WO2009150993A1 - Procédé de correction d’un signal d’image - Google Patents

Procédé de correction d’un signal d’image Download PDF

Info

Publication number
WO2009150993A1
WO2009150993A1 PCT/JP2009/060254 JP2009060254W WO2009150993A1 WO 2009150993 A1 WO2009150993 A1 WO 2009150993A1 JP 2009060254 W JP2009060254 W JP 2009060254W WO 2009150993 A1 WO2009150993 A1 WO 2009150993A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
value
correction
signal value
control signal
Prior art date
Application number
PCT/JP2009/060254
Other languages
English (en)
Japanese (ja)
Inventor
忠幸 廿楽
Original Assignee
スクルドエンタープライズ有限会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by スクルドエンタープライズ有限会社 filed Critical スクルドエンタープライズ有限会社
Publication of WO2009150993A1 publication Critical patent/WO2009150993A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/001—Texturing; Colouring; Generation of texture or colour
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B21/00—Teaching, or communicating with, the blind, deaf or mute
    • G09B21/001—Teaching or communicating with blind persons
    • G09B21/006—Teaching or communicating with blind persons using audible presentation of the information
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours

Definitions

  • the present invention relates to a signal correction method for an image signal used in a display device or the like.
  • a process for faithfully reproducing the color of a subject is performed using an R (red) signal, a G (green) signal, and a B (blue) signal which are three primary color signals. Further, although it has been possible to adjust a desired color as an image quality adjustment process, correction is performed at a certain rate, a specific color is converted into a specific color, or the like. Note that there are R signal, G signal, B signal, Y (luminance signal), CbCr (color) signal and the like as image signals generally adopted in the display device.
  • R signal, G signal, B signal, etc. As a way of expressing these R signal, G signal, B signal, etc., as an example expressed in digital, it is expressed as 0 to 255 when expressed in 8 bits, a real number from 0 to 1 when expressed as analog, and further expressed as 0% to 100%, etc. There is a way. Furthermore, it is standardized to represent a wider color gamut, such as the xvYCC standard. That is, a color gamut represented by a negative real number of 0 or less or a real number of 1 or more is also used. In the following description, unless otherwise specified, it is expressed as 0 to 255 quantized with digital 8 bits. The numbers after the decimal point are rounded and expressed as an integer.
  • a general color vision person who is a healthy person to faithfully reproduce the image signal including the R signal, the G signal, and the B signal, which are the three primary color signals.
  • green has a variety of colors, from a warm yellowish green to a bluish cold green. Among them, warm-colored dark green is almost indistinguishable from brown for people with color blindness. A bright green, brownish brown, may appear brown to people with color blindness. The deep greens of Japanese broad-leaved forests are indistinguishable from brown.
  • the dark color means a pure color that does not include other color components other than the color.
  • JP 11-175050 A JP 2000-306074 PR Japanese Patent No. 4139433 International Publication No. 2008/032528 Japanese Patent Application No. 2006-157301
  • a bright red character in a black character string is emphasized, and the character can be read even in a dark background.
  • those who suffer from the first color blindness whose red cones do not function have a variety of colors ranging from warm yellowish green to bluish cold green, among which warm warm dark green is , Almost indistinguishable from brown.
  • the brownish green which is a brilliant green, may appear pure brown.
  • the deep greens of Japanese broad-leaved forests are indistinguishable from brown.
  • green with a strong bluish color like the green on the road sign, is unlikely to be mistaken for brown.
  • An object of the present invention is to provide a signal correction method for a display device.
  • the desired color signal value and the color signal value other than the desired color signal are obtained.
  • a correction signal is generated, and the amount of correction is controlled by the control signal generated from the color signal values other than the two colors and the desired reference signal value, and the input image signal is corrected.
  • an R input terminal, a G input terminal, and a B input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal, which are three primary color signals
  • B reference signal generating means for generating and outputting a desired B reference signal for the B signal
  • G reference signal generating means for generating and outputting a desired G reference signal for the G signal
  • B control signal generating means connected to the B input terminal and generating a B control signal based on an input B signal and a B reference signal value, and outputting the B control signal to a subsequent stage
  • G control signal generating means connected to the G input terminal and generating a G control signal based on an input G signal and a G reference signal value
  • G connected to the R input terminal, the G input terminal, and the B control signal generating means generates a G correction signal for the G signal based on the input R signal, G signal, and B control signal, and outputs the G correction signal to the subsequent stage.
  • Correction signal generation means B connected to the R input terminal, the B input terminal, and the G control signal generation means, generates a B correction signal for the B signal based on the input R signal, B signal, and G control signal, and outputs the B correction signal to the subsequent stage.
  • Correction signal generation means G correction means connected to the G input terminal and the G correction signal generating means, for correcting the G signal inputted from the G input terminal based on the inputted G correction signal, and outputting a corrected signal; B correction means connected to the B input terminal and the B correction signal generating means, correcting the B signal input from the B input terminal based on the input B correction signal, and outputting a corrected signal; An R output terminal for outputting an R signal connected to the R input terminal; A G output terminal for outputting a G signal connected to the G correction means; An image signal correction method performed by an image signal correction unit including a B output terminal that outputs a B signal connected to the B correction unit, The B control signal generating means does not generate a B control signal when the B signal value is larger than the B reference signal value, and generates a B control signal when the B signal value is smaller than the B reference signal value.
  • the B control signal generates a B control signal that is inversely proportional to the B signal value and proportional to a difference value between the B signal value and the B reference signal value;
  • the G control signal generation means does not generate a G control signal when the G signal value is larger than the G reference signal value, and generates a G control signal when the G signal value is smaller than the G reference signal value.
  • the G control signal generates a G control signal that is inversely proportional to the G signal value and proportional to a difference value between the G signal value and the G reference signal value;
  • the G correction signal generation means does not generate a G correction signal when the R signal value is smaller than the G signal value multiplied by the desired coefficient GK1, and the R signal value increases the G signal value by the desired coefficient GK1.
  • a G correction signal is generated, The G correction signal is generated as the R signal value is larger or the G signal value is smaller. Conversely, the G correction signal is generated as the R signal value is smaller or the G signal value is larger.
  • the signal value is small, that is, proportional to the R signal value and inversely proportional to the G signal value, and further, the correction signal value and the correction range are determined from the relationship between the R signal value and the G signal value by the coefficient GK1.
  • the operation result to be adjusted The magnitude is adjusted by dividing by the desired coefficient GK2, and the magnitude of the value is further controlled by the B control signal, that is, G is inversely proportional to the desired coefficient GK2 and proportional to the B control signal.
  • the B correction signal generation means When the B correction signal generation means is smaller than the value obtained by multiplying the B signal value by the desired coefficient BK1, no B correction signal is generated, and the R signal value is multiplied by the desired coefficient BK by the B signal value. If greater than the value, generate a B correction signal, The B correction signal is generated as the R signal value is larger or the B signal value is smaller. Conversely, the B correction signal is generated as the R signal value is smaller or the B signal value is larger. The signal value becomes smaller, that is, proportional to the R signal value and inversely proportional to the B signal value, and further, the correction signal value and the correction range are determined from the relationship between the R signal value and the B signal value by the coefficient BK1.
  • the operation result to be adjusted The magnitude is adjusted by dividing by the desired coefficient BK2, and the magnitude of the value is further controlled by the G control signal, that is, B is inversely proportional to the desired coefficient BK2 and proportional to the G control signal.
  • Generating a correction signal A step in which the G correction means performs correction by adding the G correction signal to the input G signal, and outputs the corrected G signal;
  • the image signal correcting method of the image signal correcting means is characterized in that
  • Correction when the G signal is corrected, according to the B control signal generated based on the B signal value and the B reference signal value, the correction signal generated based on the R signal value and the G signal value, Correction can be performed by changing the correction amount.
  • This corrects only dark red, generates a G correction signal that tends to be proportional to the R signal value and inversely proportional to the G signal value or the B signal value.
  • a correction added to the signal is performed to change the appearance of red. That is, as the R signal value, which is dark red, increases, or as the G signal value or B signal value decreases, a larger correction amount of G correction signal is added. Conversely, the smaller the R signal value, or the larger the G signal value or B signal value, the smaller the correction amount.
  • the B signal is greater than the desired reference signal value, no correction signal is generated.
  • the correction amount is changed according to the G control signal generated based on the G signal value and the G reference signal value, the correction signal generated based on the R signal value, and the B signal value. Can be corrected.
  • a B correction signal that tends to be proportional to the R signal value and is inversely proportional to the G signal value or the B signal value is generated.
  • a correction added to the signal is performed to change the appearance of red. That is, as the R signal value, which is dark red, increases, or as the G signal value or B signal value decreases, a B correction signal with a larger correction amount is added.
  • the smaller the R signal value, or the larger the G signal value or B signal value the smaller the correction amount.
  • An image signal correction method is executed that makes it possible to achieve both reduction in the size of the image signal.
  • the invention according to claim 2 is an R input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal that are three primary color signals, a G input terminal, and a B input terminal; R reference signal generating means for generating and outputting a desired R reference signal for the R signal; R control signal generating means connected to the R input terminal and generating an R control signal based on an input R signal and an R reference signal value, and outputting the R control signal to a subsequent stage; B connected to the G input terminal, the B input terminal, and the R control signal generation means, generates a B correction signal for the B signal based on the input G signal, B signal, and R control signal, and outputs the B correction signal to the subsequent stage.
  • Correction signal generation means B correction means connected to the B input terminal and the B correction signal generating means, correcting the B signal input from the B input terminal based on the input B correction signal, and outputting a corrected signal;
  • An R output terminal for outputting an R signal connected to the R input terminal;
  • a G output terminal for outputting a G signal connected to the G input terminal;
  • An image signal correction method performed by an image signal correction unit including a B output terminal that outputs a B signal connected to the B correction unit,
  • the R control signal generating means does not generate an R control signal when the R signal value is larger than the R reference signal value, and generates an R control signal when the R signal value is smaller than the R reference signal value.
  • the R control signal generates an R control signal that is inversely proportional to the R signal value and proportional to a difference value between the R signal value and the R reference signal value;
  • the B correction signal generating means is smaller than the value obtained by multiplying the B signal value by the desired coefficient BK1, no B correction signal is generated, and the G signal value is multiplied by the desired coefficient BK by the B signal value. If greater than the value, generate a B correction signal, The B correction signal is generated as the G signal value is larger or the B signal value is smaller. On the contrary, as the G signal value is smaller or the B signal value is larger, the correction signal is generated.
  • the value is small, that is, proportional to the G signal value and inversely proportional to the B signal value, and the correction signal value and the correction range are adjusted by the relationship between the G signal value and the B signal value by the coefficient BK1.
  • the operation result The magnitude is adjusted by dividing by the desired coefficient BK2, and the magnitude of the value is further controlled by the R control signal, that is, B is inversely proportional to the desired coefficient BK2 and proportional to the R control signal.
  • the B signal when the B signal is corrected, according to the R control signal generated based on the R signal value and the R reference signal value, and the correction signal generated based on the G signal value and the B signal value. Can be corrected by changing the correction amount.
  • This corrects only dark green, generates a B correction signal that tends to be proportional to the G signal value and inversely proportional to the R signal value or the B signal value.
  • a correction is added to the signal to change the appearance of green. That is, as the G signal value, which is dark green, increases, or as the R signal value or B signal value decreases, a B correction signal with a larger correction amount is added. Conversely, the smaller the G signal value, or the larger the R signal value or B signal value, the smaller the correction amount.
  • An image signal correction method that makes it possible to achieve compatibility with other things is executed.
  • the invention according to claim 3 is an R input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal, which are three primary color signals, a G input terminal, and a B input terminal; G reference signal generating means for generating and outputting a desired G reference signal for the G signal; R reference signal generating means for generating and outputting a desired R reference signal for the R signal; G control signal generating means connected to the G input terminal and generating a G control signal based on an input G signal and a G reference signal value; R control signal generating means connected to the R input terminal and generating an R control signal based on an input R signal and an R reference signal value, and outputting the R control signal to a subsequent stage; The R input terminal, the B input terminal, and the G control signal generating means are connected to generate an R correction signal for the R signal based on the input R signal, B signal, and G control signal, and output to the subsequent stage.
  • Correction signal generation means G connected to the G input terminal, the B input terminal, and the R control signal generating means, and generates a G correction signal for the G signal based on the input G signal, the B signal, and the R control signal, and outputs the G correction signal to the subsequent stage.
  • Correction signal generation means R correction means connected to the R input terminal and the R correction signal generating means, correcting the R signal input from the R input terminal based on the input R correction signal, and outputting a corrected signal; G correction means connected to the G input terminal and the G correction signal generating means, correcting the G signal input from the G input terminal based on the input G correction signal, and outputting a corrected signal; An R output terminal for outputting an R signal connected to the R correction means; A G output terminal for outputting a G signal connected to the G correction means; An image signal correction method performed by an image signal correction unit including a B output terminal that outputs a B signal connected to the B input terminal, The G control signal generation means does not generate a G control signal when the G signal value is larger than the G reference signal value, and generates a G control signal when the G signal value is smaller than the G reference signal value.
  • the G control signal generates a G control signal that is inversely proportional to the G signal value and proportional to a difference value between the G signal value and the G reference signal value;
  • the R control signal generating means does not generate an R control signal when the R signal value is larger than the R reference signal value, and generates an R control signal when the R signal value is smaller than the R reference signal value.
  • the R control signal generates an R control signal that is inversely proportional to the R signal value and proportional to a difference value between the R signal value and the R reference signal value;
  • the R correction signal generating means has a B signal value smaller than a value obtained by multiplying the R signal value by a desired coefficient RK1, no R correction signal is generated, and the B signal value is obtained by multiplying the R signal value by a desired coefficient RK1. If it is greater than the value, an R correction signal is generated, The correction signal value generated as the B signal value increases or the R signal value decreases as the R correction signal increases. Conversely, the correction signal value generated as the B signal value decreases or the R signal value increases.
  • the G correction signal generation means does not generate a G correction signal when the B signal value is smaller than the value obtained by multiplying the G signal value by the desired coefficient GK1, and the B signal value increases the G signal value by the desired coefficient GK1.
  • a G correction signal is generated,
  • the G correction signal has a larger correction signal value generated as the B signal value is larger or smaller, and conversely, a correction signal value generated as the B signal value is smaller or the G signal value is larger. Is smaller, that is, proportional to the B signal value and inversely proportional to the G signal value, and further, the correction signal value and the correction range are adjusted from the relationship between the B signal value and the G signal value by the coefficient GK1.
  • the operation result The magnitude is adjusted by dividing by the desired coefficient GK2, and the magnitude of the value is controlled by the R control signal, that is, inversely proportional to the desired coefficient GK2 and proportional to the R control signal.
  • the image signal correcting method of the image signal correcting means is characterized in that
  • Correction when correcting the R signal, according to the G control signal generated based on the G signal value and the G reference signal value, and the correction signal generated based on the R signal value and the B signal value. Correction can be performed by changing the correction amount. This corrects only dark blue, generates an R correction signal that tends to be proportional to the B signal value and inversely proportional to the R signal value or the G signal value. A correction added to the signal is performed to change the appearance of blue. That is, the larger the B signal value, which is dark blue, or the smaller the R signal value or G signal value, the larger the R correction signal is added. Conversely, the smaller the B signal value, or the larger the R signal value or G signal value, the smaller the correction amount.
  • the correction amount is set according to the R control signal generated based on the R signal value and the R reference signal value, and the correction signal generated based on the G signal value and the B signal value. It can be corrected by changing. This corrects only dark blue, generates a G correction signal that tends to be proportional to the B signal value and is inversely proportional to the R signal value or the G signal value. A correction added to the signal is performed to change the appearance of blue. That is, as the B signal value, which is dark blue, increases, or as the R signal value or G signal value decreases, a larger correction amount of G correction signal is added.
  • the smaller the B signal value, or the larger the R signal value or the G signal value the smaller the correction amount.
  • the invention according to claim 4 is an R input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal, which are three primary color signals, a G input terminal, and a B input terminal; B control signal generating means connected to the B input terminal and generating a B control signal based on a B signal inputted and a B reference signal value set in advance in advance; G control signal generating means connected to the G input terminal, for generating a G control signal based on a G signal inputted and a G reference signal value set in advance, and outputting the G control signal to a subsequent stage; Connected to the R input terminal, the G input terminal, and the B control signal generating means, and based on the R signal, the G signal, the B control signal, and the G reference signal value set in advance in advance, G correction signal generation means for generating a G correction signal and outputting it to a subsequent stage; Connected to the R input terminal, the B input terminal, and the G control signal generating means, and based on the input
  • the B control signal generates a B control signal that is inversely proportional to the B signal value and proportional to a difference value between the B signal value and the B reference signal value;
  • the G control signal generation means does not generate a G control signal when the G signal value is larger than the G reference signal value, and generates a G control signal when the G signal value is smaller than the G reference signal value.
  • the G control signal generates a G control signal that is inversely proportional to the G signal value and proportional to a difference value between the G signal value and the G reference signal value;
  • the G correction signal generating means does not generate a correction signal when the G signal is larger than the G reference signal value based on the R signal, the G signal, the G reference signal value set in advance and the B control signal.
  • the G correction signal is proportional to the R signal value, is inversely proportional to the G signal value, is proportional to the difference value between the G signal value and the G reference signal value, and is proportional to the B control signal, And a step in which the calculation is performed with a desired coefficient and the magnitude of the value is adjusted to generate the B correction signal generating means, the R signal, the B signal, a preset B reference signal value, and a G control signal. If the B signal is larger than the B reference signal value, no correction signal is generated. If the B signal is smaller than the B reference signal, a B correction signal is generated.
  • the B correction signal is proportional to the R signal value, inversely proportional to the B signal value, proportional to the difference value between the B signal value and the B reference signal value, and proportional to the G control signal, And a step of generating by adjusting the magnitude of the value by calculating with a desired coefficient.
  • the G correction unit performs correction by adding the G correction signal to the input G signal, and the corrected G signal is obtained.
  • the image signal correcting method of the image signal correcting means is characterized in that
  • the G signal when the G signal is corrected, it is proportional to the R signal value, inversely proportional to the G signal value, proportional to the difference value between the G signal value and the G reference signal value, and proportional to the B control signal.
  • the G correction signal that is inversely proportional to the B signal value and proportional to the difference value between the B signal value and the B reference signal value
  • the correction amount is changed according to each value of the R signal, the G signal, and the B signal.
  • the B signal When correcting the B signal, it is proportional to the R signal value, inversely proportional to the B signal value, proportional to the difference value between the B signal value and the B reference signal value, and proportional to the G control signal, that is, to the G signal value.
  • correction is performed by changing the correction amount according to each value of the R signal, the G signal, and the B signal. be able to.
  • correction is performed only for dark red, and a G correction signal or a B correction signal that tends to be proportional to the R signal value and inversely proportional to the G signal value or the B signal value is generated.
  • Correction for adding the correction signal to the G signal or correction for adding the B correction signal to the B signal is performed to change the appearance of red. That is, the larger the R signal value, which is dark red, or the smaller the G signal value or B signal value, the larger the G correction signal or B correction signal is added.
  • An image signal correction method is executed that makes it possible to achieve both reduction in the size of the image signal.
  • the invention according to claim 5 is an R input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal, which are three primary color signals, a G input terminal, and a B input terminal; R control signal generating means connected to the R input terminal and generating an R control signal based on an input R signal and an R reference signal value set in advance, and outputting the R control signal to a subsequent stage; Connected to the G input terminal, the B input terminal, and the R control signal generating means, and based on the input G signal, B signal, R control signal, and a preset B reference signal value, B correction signal generation means for generating a B correction signal and outputting it to a subsequent stage; B correction means connected to the B input terminal and the B correction signal generating means, correcting the B signal input from the B input terminal based on the input B correction signal, and outputting a corrected signal; An R output terminal for outputting an R signal connected to the R input terminal; A G output terminal for outputting a G signal connected to the G input
  • the R control signal generates an R control signal that is inversely proportional to the R signal value and proportional to a difference value between the R signal value and the R reference signal value;
  • the B correction signal generation means does not generate a correction signal when the B signal is larger than the B reference signal value based on the G signal, the B signal, the B reference signal value set in advance and the R control signal.
  • a B correction signal is generated,
  • the B correction signal is proportional to the G signal value, inversely proportional to the B signal value, proportional to the difference value between the B signal value and the B reference signal value, and proportional to the R control signal, And a step generated by calculating with the desired coefficient and adjusting the magnitude of the value.
  • the B correction means performs correction by adding the B correction signal to the input B signal, and the corrected B signal is obtained.
  • Output step The image signal correcting method of the image signal correcting means is characterized in that
  • the B signal when the B signal is corrected, it is proportional to the G signal value, inversely proportional to the B signal value, proportional to the difference value between the B signal value and the B reference signal value, and proportional to the R control signal.
  • a B correction signal that is inversely proportional to the signal value and proportional to the difference value between the R signal value and the R reference signal value
  • the correction amount is changed according to each value of the R signal, the G signal, and the B signal. Correction can be performed. This corrects only dark green, generates a B correction signal that tends to be proportional to the G signal value and inversely proportional to the R signal value and the B signal value. A correction is added to to change the appearance of green.
  • the invention according to claim 6 is an R input terminal, an G input terminal, and a B input terminal for inputting an image signal composed of an R signal, a G signal, and a B signal, which are three primary color signals, G control signal generating means connected to the G input terminal, for generating a G control signal based on a G signal inputted and a G reference signal value set in advance, and outputting the G control signal to a subsequent stage; R control signal generating means connected to the R input terminal and generating an R control signal based on an input R signal and an R reference signal value set in advance, and outputting the R control signal to a subsequent stage; Connected to the R input terminal, the B input terminal, and the G control signal generating means, and based on the input B signal, R signal, G control signal, and an R reference signal value set in advance in advance, R correction signal generation means for generating an R correction signal and outputting it to a subsequent stage; Connected to the G input terminal, the B input terminal, and the R control signal generating means, and
  • the G control signal generates a G control signal that is inversely proportional to the G signal value and proportional to a difference value between the G signal value and the G reference signal value;
  • the R control signal generating means does not generate an R control signal when the R signal value is larger than the R reference signal value, and generates an R control signal when the R signal value is smaller than the R reference signal value.
  • the R control signal generates an R control signal that is inversely proportional to the R signal value and proportional to a difference value between the R signal value and the R reference signal value;
  • the R correction signal generating means does not generate a correction signal when the R signal is larger than the R reference signal value based on the B signal, the R signal, the R reference signal value set in advance and the G control signal.
  • the R correction signal is proportional to the B signal value, inversely proportional to the G signal value, proportional to the difference value between the G signal value and the G reference signal value, and proportional to the G control signal, Further, a step in which the calculation is performed with a desired coefficient and the magnitude of the value is adjusted, and the G correction signal generation means includes a B signal, a G signal, a G reference signal value set in advance, and an R control signal. If the G signal is larger than the G reference signal value, no correction signal is generated. If the G signal is smaller than the G reference signal, a G correction signal is generated.
  • the G correction signal is proportional to the B signal value, inversely proportional to the G signal value, proportional to the difference value between the G signal value and the G reference signal value, and proportional to the R control signal, And a step generated by adjusting the magnitude of the value by calculating with a desired coefficient.
  • the R correction means performs correction by adding the R correction signal to the input R signal, and the corrected R signal is obtained.
  • the image signal correcting method of the image signal correcting means is characterized in that
  • the R signal when correcting the R signal, it is proportional to the B signal value, inversely proportional to the R signal value, proportional to the difference value between the R signal value and the R reference signal value, and proportional to the G control signal.
  • the correction amount is changed according to each value of the R signal, the G signal, and the B signal.
  • the G signal When correcting the G signal, it is proportional to the B signal value, inversely proportional to the G signal value, proportional to the difference value between the G signal value and the G reference signal value, and proportional to the R control signal, that is, to the R signal value.
  • correction is performed by changing the correction amount according to each value of the R signal, the G signal, and the B signal. I can do things. This corrects only dark blue, and generates an R correction signal or G correction signal that tends to be proportional to the B signal value and inversely proportional to the R signal value or G signal value. Correction of adding the correction signal to the R signal or correction of adding the G correction signal to the G signal is performed to change the appearance of blue. That is, the larger the B signal value, which is dark blue, or the smaller the R signal value or G signal value, the larger the R correction signal or G correction signal is added.
  • the desired color signal value and the color signal value other than the desired color signal are changed.
  • a corresponding correction signal is generated, and the magnitude of the correction signal is controlled by a control signal generated from a color signal value other than the two colors and a desired reference signal value, and the input image signal is corrected and output. Since this is the operation method of the image signal correction means to Only the dark red is corrected, and a G correction signal or B correction signal that tends to be proportional to the R signal value and inversely proportional to the G signal value or the B signal value is generated.
  • correction is performed only for dark blue, and an R correction signal or a G correction signal that tends to be proportional to the B signal value and is inversely proportional to the R signal value or the G signal value is generated.
  • Example 1 It is a block diagram explaining the structure of the image signal correction
  • (Example 1) It is a block diagram explaining the structure of the image signal correction
  • (Example 2) It is a block diagram explaining the structure of the image signal correction
  • (Example 3) It is a figure of the example of the representative value showing the relationship of the output signal after correction
  • a correction signal corresponding to a desired color signal value and a color signal value other than the desired color signal when correcting a desired color signal among the R, G, and B signals that are the three primary color signals of the image signal This is achieved by controlling the magnitude of the correction signal using the control signal generated from the color signal values other than the two colors and the desired reference signal value, correcting the input image signal, and outputting the signal. did.
  • the image signal correcting means 10 An input terminal 20 to which an R signal that is a red component of an image signal is input; An input terminal 21 to which a G signal which is a green component of the image signal is input; An input terminal 22 to which a B signal which is a blue component of the image signal is input; B reference signal generating means 32 for generating a desired reference signal; G reference signal generation means 31 for generating a desired reference signal; B control signal generating means 42 connected to the input terminal 22, the B reference signal generating means 32, and the G correction signal generating means 51 in the subsequent stage; A G control signal generating means 41 connected to the input terminal 21, the G reference signal generating means 31, and the B correction signal generating means 52 in the subsequent stage; G correction signal generation means 51 connected to the input terminal 20, the input terminal 21, the B control signal generation means 42, and the G correction means
  • the B reference signal necessary for the B control signal generating means 42 can be set in advance in the B control signal generating means 42. In that case, the B reference signal generating means 32 is unnecessary.
  • a value of the G reference signal necessary for the G control signal generation unit 41 can be set in the G control signal generation unit 41 in advance. In that case, the G reference signal generating means 31 is unnecessary.
  • each reference signal value is effectively corrected in a region that is difficult to see for those suffering from the first color blindness, and is not corrected in a region where the G signal and the B signal are equal to or greater than the desired reference signal value.
  • a predetermined value smaller than half of the maximum value preferably about 25% to 49% of the maximum value, and more preferably 40% of the maximum value. It may be set to about% (signal value 102).
  • a predetermined value smaller than half of the maximum value, preferably about 25% to 49% of the maximum value, and more preferably 40% of the maximum value. It may be set to about% (signal value 102).
  • various changes can be made to the extent that the effect is not hindered. If it is desired to expand the correction range, it may be more than 50%. However, considering compatibility with healthy people, it is not very desirable to make it nearly 100%. Further, in the case of a color blind person who is relatively close to a healthy person, the reference value may be reduced to narrow the correction area.
  • the B reference signal generating unit 32 and the G reference signal generating unit 31 generate 102 (40%) reference signals.
  • the input terminal 20 receives an R signal that is a red component of the image signal
  • a G signal which is a green component of the image signal is input to the input terminal 21
  • a B signal that is a blue component of the image signal is input to the input terminal 22. Therefore, the R signal is input to the G correction signal generation unit 51 and the B correction signal generation unit 52 and is output from the output terminal 70
  • the G signal is input to the G control signal generation means 41, the G correction signal generation means 51, and the G correction means 61
  • the B signal is input to the B control signal generation unit 42, the B correction signal generation unit 52, and the B correction unit 62.
  • the B control signal generation means 42 does not generate a B control signal when the B signal value is larger than the B reference signal value, and the B signal value is the B reference signal value.
  • the difference value is smaller, it is linked to the difference value obtained by subtracting the B signal value from the B reference signal value. That is, if the difference value is small, the B control signal is small, and if the difference value is large, the B control signal is large.
  • the B control signal is generated by calculating the tendency, and output to the G correction signal generation means 51 in the subsequent stage.
  • the B control signal has a characteristic that is inversely proportional to the B signal value and proportional to the difference value between the B signal value and the B reference signal value, and controls the magnitude of the correction amount of the G correction signal generation means 51 in the subsequent stage.
  • the input B signal is B, where B is 0 to 255
  • the B reference signal generated by the B reference signal generating means 32 is BS, where BS is 0 to 255 (BS ⁇ B) is a negative value
  • the generated B control signal is 0,
  • (BS ⁇ B) is a positive value
  • B control signal (BS ⁇ B) ⁇ BS, A control signal is generated. Therefore, the B control signal is 0 to 1.
  • the B control signal is determined to be in the range of 0 to 1 by the above formula, but various modifications are possible.
  • Table 1 below shows typical values of the B control signal generated based on the B signal and the B reference signal in this example. As shown in Table 1, when the input signal becomes less than the reference signal, a control signal for controlling the magnitude of the correction signal is generated, and the control signal is larger as the input signal is less than the reference value and smaller. A signal is generated, and a smaller control signal is generated as the input signal is smaller than the reference value and larger.
  • the B control signal generating means 42 adopts a system that uses an input / output comparison table to correct digitized gradation data, which is a lookup table system, to an arbitrary gradation
  • the B signal value is larger than the B reference signal value based on the information of the comparison table based on the input B signal and a predetermined B reference signal
  • the B control signal is not generated, and the B signal value is the B reference signal.
  • the difference value is smaller than the value, the smaller the difference value obtained by subtracting the B signal value from the B reference signal value, the smaller the generated B control signal, and the larger the difference value, the larger the generated B control signal. It is possible to obtain the same information as the desired calculation result. Therefore, when the B control signal generation means 42 is a lookup table system or a system equivalent thereto, the B reference signal generation means 32 may be omitted or may be incorporated in the lookup table means. A similar B control signal is obtained.
  • the G correction signal generation means 51 is uniquely determined according to the R signal value, the G signal value, and the B control signal value, that is, the correction signal is related to the magnitude of the R signal value and the G signal value.
  • a correction signal for determining the magnitude of the correction value is generated, the magnitude of the correction signal is controlled by the B control signal, and output to the G correction means 61.
  • the G correction signal generating means 51 generates a G correction signal that tends to be proportional to the R signal value, inversely proportional to the G signal value, and proportional to the B control signal.
  • GK1 is a desired coefficient, for example 2.5
  • GK2 is a desired coefficient, for example 5
  • the input R signal is R, where R is 0 to 255
  • R is 0 to 255
  • G correction signal is 0,
  • G correction signal ((R ⁇ (G ⁇ GK1)) ⁇ GK2) ⁇ B control signal
  • a G correction signal is generated.
  • GK1 and GK2 are coefficients that are desired when generating the correction signal and can be changed.
  • the generated correction signal When the value is decreased, the generated correction signal is increased. When the value is increased, the generated correction signal is decreased. .
  • this coefficient By appropriately setting this coefficient, it is possible to adjust the correction amount and the correction range, and the correction is effectively performed in a hard-to-see area where it is difficult for a person with color blindness to distinguish, and in a region where the B signal is equal to or higher than a desired reference signal value It is possible to appropriately set a range in which it is possible to achieve both the uncorrected and uncomfortable feeling for the healthy person.
  • the G correction signal generating means 51 does not generate a G correction signal based on the input R signal and G signal, and does not generate a G correction signal when the R signal value is smaller than a value obtained by multiplying the G signal value by a desired coefficient GK1. If the value is larger than the value obtained by multiplying the G signal value by a desired coefficient GK, a G correction signal is generated.
  • the G correction signal is generated as the R signal value is larger or the G signal value is smaller. Conversely, the G correction signal is generated as the R signal value is smaller or the G signal value is larger.
  • the G correction signal is proportional to the R signal value, is inversely proportional to the G signal value, and the correction signal value and the correction range are appropriately set based on the relationship between the R signal value and the G signal value by the coefficient GK1, It has a tendency to be inversely proportional to the desired coefficient GK2 and proportional to the B control signal.
  • a correction range is appropriately set based on the relationship between the coefficient, the R signal, and the G signal, and is proportional to the R signal value. It is inversely proportional, proportional to the B control signal, and has a tendency to adjust the value by a coefficient.
  • Table 2 shows representative values of the G correction signal generated based on the R signal, the G signal, and the B control signal in this example. As shown in Table 2, when the B signal value is less than the B reference signal value, the G correction signal is generated in proportion to the R signal value and inversely proportional to the G signal value.
  • the G correction signal generating means 51 adopts a method that uses an input / output comparison table to correct digitized gradation data, which is a look-up table method, to an arbitrary gradation. If the R signal value is smaller than the value obtained by multiplying the G signal value by a desired coefficient GK1 based on the R and G signals inputted, the correction signal is not generated and the R signal value is G. When the signal value is larger than the desired value GK1 times, the smaller the G signal value or the larger the R signal value, the larger the correction signal value generated, and conversely, the larger the G signal value or the R signal.
  • the desired calculation is characterized in that the smaller the value is, the smaller the correction signal value is generated.
  • the calculation result is divided by the desired coefficient GK2 for setting the magnitude of the correction signal value, and the calculation result is further calculated.
  • the desired result of operation characterized in that at control signal is controlled magnitude value, may be a similar information. Therefore, even if the G correction signal generation means 51 is a lookup table method or a method equivalent thereto, it tends to be proportional to the R signal value, and tends to be inversely proportional to the G signal value.
  • a G correction signal whose magnitude is controlled can be generated.
  • the G control signal generation means 41 does not generate a G control signal when the G signal value is larger than the G reference signal value based on the input G signal and the G reference signal, and the G signal value is the G reference signal value.
  • the difference value is smaller, it is linked to the magnitude of the difference value obtained by subtracting the G signal value from the G reference signal value, that is, the G control signal is small when the difference value is small, and the G control signal is large when the difference value is large.
  • the G control signal is generated by calculating the tendency, and output to the B correction signal generation unit 52 at the subsequent stage.
  • the G control signal has a feature that is inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value, and controls the magnitude of the correction amount of the B correction signal generation means 52 in the subsequent stage.
  • the input G signal is G, where G is 0 to 255
  • the G reference signal generated by the G reference signal generating means 31 is GS, where GS is 0 to 255
  • (GS ⁇ G) is a negative value
  • the generated G control signal is 0,
  • G control signal (GS ⁇ G) ⁇ GS, A G control signal is generated. Therefore, the G control signal is 0 to 1.
  • the G control signal is determined to be in the range of 0 to 1 by the above formula, but various modifications are possible.
  • the G control signal generation means 41 is a lookup table system or a system equivalent thereto, the G reference signal generation means 31 may be omitted or may be built in the lookup table means, as described above. A G control signal can be obtained.
  • the B correction signal generation means 52 is uniquely determined according to the R signal value, the B signal value, and the G control signal value, that is, the correction signal is related to the magnitude of the R signal value and the B signal value.
  • a correction signal for determining the magnitude of the value is generated, and the magnitude of the correction signal is controlled by the G control signal and output to the B correction means 62.
  • the B correction signal generation means 52 generates a B correction signal that tends to be proportional to the R signal value, inversely proportional to the B signal value, and proportional to the G control signal.
  • BK1 is a desired coefficient, for example 2.5
  • BK2 is a desired coefficient, for example 5
  • the input R signal is R, where R is 0 to 255
  • R is 0 to 255
  • B correction signal is 0,
  • B correction signal ((R ⁇ (B ⁇ BK1)) ⁇ BK2) ⁇ G control signal, A B correction signal is generated.
  • BK1 and BK2 are desired coefficients for generating the correction signal and can be changed.
  • the generated correction signal When the value is decreased, the generated correction signal is increased, and when the value is increased, the generated correction signal is decreased. .
  • this coefficient By appropriately setting this coefficient, it is possible to adjust the correction amount and the correction range, and it is effectively corrected in a region where it is difficult to distinguish a person with color blindness, and the G signal is equal to or greater than a desired reference signal value. It is possible to appropriately set a range in which it is possible to achieve both the uncorrected and uncomfortable feeling for a healthy person.
  • the B correction signal generation means 52 does not generate a correction signal based on the input R signal and B signal, and generates an R signal value when the R signal value is smaller than a value obtained by multiplying the B signal value by a desired coefficient BK1. Is larger than the value obtained by multiplying the B signal value by a desired coefficient BK1, a B correction signal is generated, The B correction signal is generated as the R signal value increases or the B signal value decreases. Conversely, the B correction signal is generated as the R signal value decreases or the B signal value increases.
  • the B correction signal is proportional to the R signal value, is inversely proportional to the B signal value, and the correction signal value and the correction range are appropriately adjusted from the relationship between the R signal value and the B signal value by the coefficient BK1
  • the correction range is appropriately set from the relationship between the coefficient, the R signal value, and the B signal value, and is proportional to the R signal value.
  • Inversely proportional to the value proportional to the G control signal, and has a tendency to be adjusted by a coefficient.
  • the representative values of the B correction signal generated based on the R signal, the B signal, and the G control signal in this example are the same as those in Table 2.
  • the B correction signal generating means 52 is a lookup table method or a method equivalent thereto, it tends to be proportional to the R signal value and inversely proportional to the B signal value.
  • a G correction signal whose magnitude is controlled can be generated.
  • the G correction unit 61 performs correction by adding the G signal from the input terminal 21 based on the G correction signal from the G correction signal generation unit 51, and outputs the corrected signal to the output terminal 71.
  • the B correction unit 62 performs correction by adding the B signal from the input terminal 22 based on the B correction signal from the B correction signal generation unit 52, and outputs the corrected signal to the output terminal 72.
  • the representative values of the G signal corrected by the G correction signal of this example and the representative values of the B signal corrected by the B correction signal are shown in the following Table 3 and FIG. As described above in Table 3, when the B signal value is less than the reference signal value, a G correction signal that is proportional to the R signal value and inversely proportional to the G signal value is generated.
  • a corrected value obtained by performing correction added to the G signal is shown.
  • a B correction signal proportional to the R signal value and inversely proportional to the B signal value is generated, and the B correction signal is added to the B signal. It shows the value after correction performed.
  • the original signal is output as it is in a portion without correction.
  • a correction signal related to the magnitude of the values of the R signal and the G signal is generated, and when the B signal is 0, the correction is performed. Since the control signal for controlling the amount is 1, that is, the B signal is dark red because it is dark red, the G signal is corrected. As the B signal approaches the reference signal value from 0, the correction amount decreases. If the signal value is greater than or equal to the signal value, the control signal for controlling the correction amount is 0, that is, no correction is performed because the B signal is greater than the reference signal value and not dark red.
  • a correction signal related to the magnitude of the values of the R signal and the B signal is generated, and when the G signal is 0, the control signal for controlling the correction amount is 1, that is, the G signal. Since there is no dark red, the B signal is corrected, and the correction amount decreases each time the G signal approaches the reference signal value from 0. Is 0, that is, the G signal is equal to or greater than the reference signal value, and is not dark red, so correction is not performed.
  • the correction range is set by the calculation result of (R ⁇ (G ⁇ GK1)), but the G reference set in advance for other G signals. Even if the correction signal is generated when the signal value, for example, the G signal value is less than 102 (40%), the same effect can be obtained. Furthermore, the correction amount is determined by the calculation result of (R ⁇ (G ⁇ GK1)) ⁇ GK2) ⁇ B control signal, but is proportional to the other R signal value and inversely proportional to the G signal value, and the B control.
  • the same effect can be obtained by means of adjusting the magnitude by calculating with some coefficients in proportion to the signal (inversely proportional to the B signal value and proportional to the difference value between the B signal value and the B reference signal value). Is obtained. Accordingly, a new G reference signal value for the G signal is preset in the G correction signal generating means 51, and is proportional to the R signal value and inversely proportional to the G signal value. Proportional to the difference value, proportional to the B control signal (inversely proportional to the B signal value and proportional to the difference value between the B signal value and the B reference signal value), and the size is adjusted by calculating with several coefficients. Similar effects can be obtained as a means.
  • the G reference signal value is GS
  • G control signal ((GS ⁇ G) ⁇ GS)
  • B reference signal value is BS
  • B control signal ((BS ⁇ B) ⁇ BS)
  • the B control signal is an example of 0 to 1
  • the correction range is set by the calculation result of (R ⁇ (B ⁇ BK1)), but the B reference set in advance for the other B signals. Even if the correction signal is generated when the signal value, for example, the B signal value is less than 102 (40%), the same effect can be obtained. Furthermore, the correction amount is determined by the calculation result of (R ⁇ (B ⁇ BK1)) ⁇ BK2) ⁇ G control signal, but is proportional to the other R signal values and inversely proportional to the B signal values, and the G control.
  • the same effect can be obtained by means of calculating with some coefficients and adjusting the magnitude in proportion to the signal (inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value). Is obtained. Therefore, a new B reference signal value for the B signal is preset in the B correction signal generating means 52, and is proportional to the R signal value and inversely proportional to the B signal value. Proportional to the difference value, proportional to the G control signal (inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value), and the size is adjusted by calculating with several coefficients. The same effect can be obtained as a means.
  • B reference signal value is BS
  • B control signal ((BS ⁇ B) ⁇ BS)
  • B control signal ((BS ⁇ B) ⁇ BS)
  • B control signal ((GS ⁇ G) ⁇ GS)
  • G control signal ((GS ⁇ G) ⁇ GS)
  • BS is a preset reference signal value 102
  • GS is a preset reference signal value 102
  • BK2 is a desired coefficient
  • the B control signal generated based on the B signal value and the B reference signal value the correction signal generated based on the R signal value and the G signal value
  • the correction can be performed by changing the correction amount.
  • This corrects only dark red generates a G correction signal that tends to be proportional to the R signal value and inversely proportional to the G signal value or the B signal value.
  • a correction added to the signal is performed to change the appearance of red. That is, the larger the R signal value that is dark red, or the smaller the B signal value or G signal value, the larger the G correction signal is added. Conversely, the smaller the R signal value, or the larger the B signal value or G signal value, the smaller the correction amount.
  • the correction amount is set according to the G control signal generated based on the G signal value and the G reference signal value, and the correction signal generated based on the R signal value and the B signal value. It can be corrected by changing. As a result, only the dark red is corrected, and a B correction signal that tends to be proportional to the R signal value and is inversely proportional to the G signal value or the B signal value is generated. A correction added to the signal is performed to change the appearance of red. That is, as the R signal value, which is dark red, increases, or as the G signal value or B signal value decreases, a B correction signal with a larger correction amount is added.
  • the smaller the R signal value, or the larger the G signal value or B signal value the smaller the correction amount.
  • the G signal is greater than the desired reference signal value, no correction signal is generated. For this reason, since the person who suffers from the first color blindness is effectively corrected in the hard-to-see area that is difficult to discriminate, and the G signal or B signal is not corrected in the area that is greater than the desired reference signal value, the healthy person also feels uncomfortable.
  • An image signal correction method is executed that makes it possible to achieve both reduction in the size of the image signal.
  • the image signal correcting means 10A An input terminal 20 to which an R signal that is a red component of an image signal is input; An input terminal 21 to which a G signal which is a green component of the image signal is input; An input terminal 22 to which a B signal which is a blue component of the image signal is input; R reference signal generating means 30 for generating a desired reference signal; An R control signal generating means 40 connected to the input terminal 20, the R reference signal generating means 30, and the B correction signal generating means 52 in the subsequent stage; B correction signal generation means 52 connected to the input terminal 21, the input terminal 22, the R control signal generation means 40, and the B correction means 62 in the subsequent stage; B correction means 62 connected to the input terminal 22, the B correction signal generation means 52, and the output terminal 72 in the subsequent stage; An output terminal 70 connected to the input terminal 20; An output terminal 71 connected to the input terminal 21; And an output terminal 72 connected
  • the R reference signal necessary for the R control signal generation means 40 can be set in advance in the R control signal generation means 40. In that case, the R reference signal generating means 30 is unnecessary.
  • the reference signal value is effectively corrected in a region where it is difficult to identify a person suffering from the first color blindness, and the correction is not performed in a region where the R signal is greater than the desired reference signal value.
  • a predetermined value smaller than half of the maximum value preferably about 25% to 49% of the maximum value, more preferably 40% of the maximum value (signal value 102)
  • various changes can be made to the extent that the effect is not hindered.
  • the R reference signal generation unit 30 generates 102 (40%) reference signals.
  • the image signal correction means 10A configured as described above adds a B correction signal with a larger correction amount as the G signal value, which is dark green, increases or as the R signal value or B signal value decreases. . Conversely, the smaller the G signal value, or the larger the R signal value or B signal value, the smaller the correction amount. Further, if the R signal is greater than the desired reference signal value, no correction signal is generated.
  • the input terminal 20 receives an R signal that is a red component of the image signal
  • a G signal which is a green component of the image signal is input to the input terminal 21
  • a B signal that is a blue component of the image signal is input to the input terminal 22. Therefore, the R signal is input to the R control signal generating means 40 and output at the output terminal 70
  • the G signal is input to the B correction signal generating means 52 and output at the output terminal 71,
  • the B signal is input to the B correction signal generation unit 52 and the B correction unit 62.
  • the R control signal generation unit 40 does not generate an R control signal when the R signal value is larger than the R reference signal value based on the input R signal and the R reference signal, and the R signal value is the R reference signal value.
  • the difference value is smaller, it is linked to the difference value obtained by subtracting the R signal value from the R reference signal value. That is, if the difference value is small, the B control signal is small, and if the difference value is large, the B control signal is large.
  • An R control signal is generated by calculating the tendency, and output to the B correction signal generation means 52 at the subsequent stage.
  • the R control signal has a feature that is inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value, and controls the magnitude of the correction amount of the B correction signal generation means 52 in the subsequent stage.
  • the input R signal is R, where R is 0 to 255
  • the R reference signal generated by the R reference signal generating means 30 is RS, where RS is 0 to 255 (RS ⁇ R) is a negative value
  • the generated R control signal is 0,
  • (RS ⁇ R) is a positive value
  • R control signal (RS ⁇ R) ⁇ RS
  • a control signal is generated. Therefore, the R control signal is 0 to 1.
  • the R control signal is determined to be in the range of 0 to 1 by the above formula, but various modifications are possible.
  • Table 4 shows typical values of the R control signal generated based on the R signal and the R reference signal in this example. As shown in Table 4, when the input signal becomes less than the reference signal, a control signal for controlling the magnitude of the correction signal is generated. When the input signal is less than the reference value and the value is smaller, the control signal is larger. A signal is generated, and a smaller control signal is generated as the input signal is smaller than the reference value and larger.
  • the R control signal generation means 40 is a lookup table method or a method equivalent thereto, the R reference signal generation means 30 may be omitted or may be incorporated in the lookup table means. A similar R control signal is obtained.
  • the B correction signal generation means 52 is uniquely determined according to the G signal value, the B signal value, and the R control signal value, that is, the correction signal is related to the magnitude of the G signal value and the B signal value.
  • a correction signal for determining the magnitude of the value is generated, and the magnitude of the correction signal is controlled by the R control signal and output to the B correction means 62.
  • the B correction signal generation means 52 generates a B correction signal that tends to be proportional to the G signal value, inversely proportional to the B signal value, and proportional to the R control signal.
  • BK1 is a desired coefficient, for example 2.5
  • BK2 is a desired coefficient, for example 5
  • the input G signal is G, where G is 0 to 255
  • B is 0 to 255
  • B correction signal is 0,
  • B correction signal ((G ⁇ (B ⁇ BK1)) ⁇ BK2) ⁇ R control signal
  • a correction signal B is generated.
  • BK1 and BK2 are desired coefficients for generating the correction signal and can be changed.
  • the generated correction signal When the value is decreased, the generated correction signal is increased, and when the value is increased, the generated correction signal is decreased. .
  • this coefficient By appropriately setting this coefficient, it is possible to adjust the correction amount and the correction range, and it is effectively corrected in a hard-to-see area where it is difficult for a person with color blindness to be distinguished. It is possible to appropriately set a range in which it is possible to achieve both the uncorrected and uncomfortable feeling for the healthy person.
  • the B correction signal generation means 52 does not generate a correction signal based on the input G signal and B signal, and generates a G signal value when the G signal value is smaller than a value obtained by multiplying the B signal value by a desired coefficient BK1. Is larger than the value obtained by multiplying the B signal value by a desired coefficient BK1, a B correction signal is generated, The B correction signal is generated as the G signal value increases or the B signal value decreases. Conversely, the B correction signal is generated as the G signal value decreases or the B signal value increases.
  • the B correction signal is proportional to the G signal value, is inversely proportional to the B signal value, and the correction signal value and the correction range are appropriately set based on the relationship between the G signal value and the B signal value by the coefficient BK1, It has a tendency to be inversely proportional to the desired coefficient BK2 and proportional to the R control signal.
  • a correction range is appropriately set based on the relationship between the coefficient, the G signal, and the B signal, and is proportional to the G signal value. It is inversely proportional, proportional to the R control signal, and has a tendency to adjust the value by a coefficient.
  • Table 5 below shows representative values of the B correction signal generated based on the G signal, the B signal, and the R control signal in this example. As shown in Table 5, when the R signal value is less than the R reference signal value, the B correction signal is generated in proportion to the G signal value and inversely proportional to the B signal value.
  • the B correction signal generating means 52 is a lookup table method or a method equivalent thereto, it tends to be proportional to the G signal value and inversely proportional to the B signal value.
  • the B correction signal whose size is controlled can be generated.
  • the B correction unit 62 performs correction by adding the B signal from the input terminal 22 based on the B correction signal from the B correction signal generation unit 52, and outputs the corrected signal to the output terminal 72.
  • Representative values of the B signal corrected by the B correction signal of this example are shown in the following Table 6 and FIG. As described above in Table 6, when the R signal value is less than the reference signal value, a B correction signal in a state proportional to the G signal value and inversely proportional to the B signal value is generated. A corrected value obtained by adding a signal to the B signal is shown. In addition, the original signal is output as it is in a portion without correction.
  • a correction signal related to the magnitude of the values of the G signal and the B signal is generated, and when the R signal is 0, the correction is performed.
  • the control signal for controlling the amount is 1, that is, there is no R signal and dark green, so the B signal is corrected.
  • the correction amount decreases.
  • the control signal for controlling the correction amount is 0, that is, the R signal is equal to or greater than the reference signal value and is not dark green, and thus correction is not performed.
  • the correction range is set by the calculation result of (G ⁇ (B ⁇ BK1)), but the B reference set in advance for the other B signals. Even if the correction signal is generated when the signal value, for example, the B signal value is less than 102 (40%), the same effect can be obtained. Furthermore, the correction amount is determined by the calculation result of (G ⁇ (B ⁇ BK1)) ⁇ BK2) ⁇ R control signal, but is proportional to the other G signal value and inversely proportional to the B signal value.
  • the same effect can be obtained by means of adjusting the magnitude by calculating with some coefficients in proportion to the signal (inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value). Is obtained. Therefore, a new B reference signal value for the B signal is preset in the B correction signal generating means 52, and is proportional to the G signal value and inversely proportional to the B signal value. Proportional to the difference value, proportional to the R control signal (inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value), and the size is adjusted by calculation using several coefficients. Similar effects can be obtained as a means.
  • B reference signal value is BS
  • B control signal ((BS ⁇ B) ⁇ BS)
  • B control signal ((BS ⁇ B) ⁇ BS)
  • R reference signal value is RS
  • R control signal ((RS ⁇ R) ⁇ RS)
  • RS is a preset reference signal value 102
  • BS is a reference signal value set in advance 102
  • BK2 is a desired coefficient
  • 28 is generated as a correction signal value
  • the correction amount can be changed and corrected.
  • a correction is added to the signal to change the appearance of green. That is, as the G signal value, which is dark green, increases, or as the R signal value or B signal value decreases, a B correction signal with a larger correction amount is added. Conversely, the smaller the G signal value, or the larger the R signal value or B signal value, the smaller the correction amount.
  • the image signal correction means 10B An input terminal 20 to which an R signal that is a red component of an image signal is input; An input terminal 21 to which a G signal which is a green component of the image signal is input; An input terminal 22 to which a B signal which is a blue component of the image signal is input; G reference signal generation means 31 for generating a desired reference signal; R reference signal generating means 30 for generating a desired reference signal; G control signal generating means 41 connected to the input terminal 21, the G reference signal generating means 31, and the R correction signal generating means 50 in the subsequent stage; An R control signal generating means 40 connected to the input terminal 20, the R reference signal generating means 30, and a G correction signal generating means 51 in the subsequent stage; An R correction signal generating means 50 connected to the input terminal 20, the input terminal 22, the G control signal generating means 41, and the R correcting means 60 in the subsequent stage; G correction signal generation means 51 connected to the input terminal 21, the input terminal 22, the
  • the G reference signal necessary for the G control signal generating means 41 can be set in advance in the G control signal generating means 41. In that case, the G reference signal generating means 31 is unnecessary.
  • the R reference signal necessary for the R control signal generation means 40 can be set in advance in the R control signal generation means 40. In that case, the R reference signal generating means 30 is unnecessary.
  • each reference signal value is effectively corrected in an area where it is difficult for a person suffering from third color blindness to discern, and is not corrected in an area where the R signal or G signal is greater than the desired reference signal value.
  • a predetermined value smaller than half of the maximum value preferably about 25% to 49% of the maximum value, and more preferably 40% of the maximum value. It may be set to about% (signal value 102).
  • a predetermined value smaller than half of the maximum value, preferably about 25% to 49% of the maximum value, and more preferably 40% of the maximum value. It may be set to about% (signal value 102).
  • various changes can be made to the extent that the effect is not hindered. If it is desired to expand the correction range, it may be more than 50%. However, considering compatibility with healthy people, it is not very desirable to make it nearly 100%. Further, in the case of a color blind person who is relatively close to a healthy person, the reference value may be reduced to narrow the correction area.
  • the G reference signal generation unit 31 and the R reference signal generation unit 30 generate 102 (40%) reference signals.
  • the image signal correction means 10B configured as described above has a larger correction amount of R correction signal or G correction signal as the B signal value, which is dark blue, increases, or as the R signal value or G signal value decreases. Added. Conversely, the smaller the B signal value, or the larger the R signal or G signal, the smaller the correction amount. Further, if the R signal or G signal is greater than the desired reference signal value, no correction signal is generated.
  • the input terminal 20 receives an R signal that is a red component of the image signal
  • a G signal which is a green component of the image signal is input to the input terminal 21
  • a B signal that is a blue component of the image signal is input to the input terminal 22. Therefore, the R signal is input to the R control signal generation means 40, the R correction signal generation means 50, and the R correction means 60
  • the G signal is input to the G control signal generation means 41, the G correction signal generation means 51, and the G correction means 61
  • the B signal is input to the R correction signal generation unit 50 and the G correction signal generation unit 51 and is output from the output terminal 72.
  • the G control signal generator 41 does not generate a G control signal when the G signal value is larger than the G reference signal value based on the input G signal and the G reference signal, and the G signal value is the G reference signal value.
  • the difference value is smaller, it is linked to the magnitude of the difference value obtained by subtracting the G signal value from the G reference signal value. That is, if the difference value is small, the G control signal is small, and if the difference value is large, the G control signal is large.
  • the G control signal is generated by calculating the tendency, and output to the R correction signal generation means 50 in the subsequent stage.
  • the G control signal has a feature that is inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value, and controls the magnitude of the correction amount of the R correction signal generation means 50 in the subsequent stage.
  • the input G signal is G, where G is 0 to 255
  • the G reference signal generated by the G reference signal generating means 31 is GS, where GS is 0 to 255
  • (GS ⁇ G) is a negative value
  • the generated G control signal is 0,
  • G control signal (GS ⁇ G) ⁇ GS, A control signal is generated. Therefore, the G control signal is 0 to 1.
  • the G control signal is determined to be in the range of 0 to 1 by the above formula, but various modifications are possible.
  • Table 7 below shows representative values of the G control signal generated based on the G signal and the G reference signal in this example. As shown in Table 7, a control signal for controlling the magnitude of the correction signal is generated when the input signal becomes less than the reference signal, and the control signal is larger as the input signal is less than the reference value and smaller. A signal is generated, and a smaller control signal is generated as the input signal is smaller than the reference value and larger.
  • the G control signal generation means 41 is a lookup table method or a method equivalent thereto, the G reference signal generation means 31 may be omitted or may be incorporated in the lookup table means. A similar G control signal can be obtained.
  • the R correction signal generation means 50 is uniquely determined according to the B signal value, the R signal value, and the G control signal value, that is, the correction signal is related to the magnitude of the B signal value and the R signal value.
  • a correction signal for determining the magnitude of the value is generated, and the magnitude of the correction signal is controlled by the G control signal and output to the R correction means 60.
  • the R correction signal generation means 50 generates an R correction signal that tends to be proportional to the B signal value, inversely proportional to the R signal value, and proportional to the G control signal value.
  • RK1 is a desired coefficient, for example 2.5
  • RK2 is a desired coefficient, for example 5
  • the input R signal is R, where R is 0 to 255
  • R is 0 to 255
  • R correction signal is 0,
  • R correction signal ((B ⁇ (R ⁇ RK1)) ⁇ RK2) ⁇ G control signal, An R correction signal is generated.
  • RK1 and RK2 are desired coefficients for generating the correction signal and can be changed.
  • the generated correction signal When the value is decreased, the generated correction signal is increased. When the value is increased, the generated correction signal is decreased. .
  • this coefficient By appropriately setting this coefficient, it is possible to adjust the correction amount and the correction range, and it is effectively corrected in a region in which a person with color blindness is difficult to distinguish and difficult to see. It is possible to appropriately set a range in which it is possible to achieve both the uncorrected and uncomfortable feeling for a healthy person.
  • the R correction signal generation means 50 does not generate an R correction signal when the B signal value is smaller than a value obtained by multiplying the R signal value by a desired coefficient RK1, based on the input B signal and the R signal, and generates the B signal. If the value is larger than the R signal value multiplied by the desired coefficient RK1, an R correction signal is generated, The R correction signal is generated as the B signal value is larger or the R signal value is smaller. Conversely, the R correction signal is generated as the B signal value is smaller or the R signal value is larger.
  • the R correction signal is proportional to the B signal value, is inversely proportional to the R signal value, and the correction signal value and the correction range are appropriately set based on the relationship between the B signal value and the R signal value by the coefficient RK1, It has a tendency to be inversely proportional to the desired coefficient RK2 and proportional to the G control signal.
  • a correction range is appropriately set based on the relationship between the coefficient, the B signal, and the R signal, and is proportional to the B signal value. It is inversely proportional, proportional to the G control signal, and has a tendency to adjust the value by a coefficient.
  • Table 8 shows representative values of the R correction signal generated based on the B signal, the R signal, and the G control signal in this example. As shown in Table 8, when the G signal value is less than the G reference signal value, the R correction signal is generated in proportion to the B signal value and inversely proportional to the R signal value.
  • the R correction signal generation means 50 is a lookup table method or a method equivalent thereto, it tends to be proportional to the B signal value and inversely proportional to the R signal value.
  • An R correction signal whose size is controlled can be generated.
  • the R control signal generation unit 40 does not generate an R control signal when the R signal value is larger than the R reference signal value based on the input R signal and the R reference signal, and the R signal value is the R reference signal value.
  • the difference value is smaller, it is linked to the difference value obtained by subtracting the R signal value from the R reference signal value. That is, if the difference value is small, the R control signal is small, and if the difference value is large, the R control signal is large.
  • the R control signal is generated and output to the G correction signal generation means 51 in the subsequent stage.
  • the R control signal has a feature that is inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value, and controls the magnitude of the correction amount of the G correction signal generation means 51 in the subsequent stage.
  • the input R signal is R, where R is 0 to 255
  • the R reference signal generated by the R reference signal generating means 30 is RS, where RS is 0 to 255 (RS ⁇ R) is a negative value
  • the generated R control signal is 0,
  • (RS ⁇ R) is a positive value
  • R control signal (RS ⁇ R) ⁇ RS
  • a control signal is generated. Therefore, the R control signal is 0 to 1.
  • the R control signal is determined to be in the range of 0 to 1 by the above formula, but various modifications are possible.
  • the R control signal generation means 40 is a lookup table system or a system equivalent thereto, the R reference signal generation means 30 may not be provided or may be incorporated in the lookup table means, as described above. R control signal can be obtained.
  • the G correction signal generation means 51 is uniquely determined according to the G signal value, the B signal value, and the R control signal value, that is, the correction signal is related to the magnitude of the G signal value and the B signal value.
  • a correction signal for determining the magnitude of the value is generated, and the magnitude of the correction signal is controlled by the R control signal and output to the G correction means 61.
  • the G correction signal generating means 51 generates a G correction signal that tends to be proportional to the B signal value, inversely proportional to the G signal value, and proportional to the R control signal.
  • GK1 is a desired coefficient, for example 2.5
  • GK2 is a desired coefficient, for example 5
  • the input G signal is G, where G is 0 to 255
  • G is 0 to 255
  • B is 0 to 255
  • G correction signal is 0,
  • B- (G ⁇ GK1)) is a positive value
  • G correction signal ((B ⁇ (G ⁇ GK1)) ⁇ GK2) ⁇ R control signal
  • a G correction signal is generated.
  • GK1 and GK2 are coefficients that are desired when generating the correction signal and can be changed.
  • the generated correction signal When the value is decreased, the generated correction signal is increased. When the value is increased, the generated correction signal is decreased. .
  • this coefficient By appropriately setting this coefficient, it is possible to adjust the correction amount and the correction range, and it is effectively corrected in a hard-to-see area where it is difficult for a person with color blindness to be distinguished. It is possible to appropriately set a range in which it is possible to achieve both the uncorrected and uncomfortable feeling for a healthy person.
  • the G correction signal generation means 51 does not generate a correction signal when the B signal value is smaller than the value obtained by multiplying the G signal value by a desired coefficient GK1, and the B signal value Is larger than a value obtained by multiplying the G signal value by a desired coefficient GK1, a G correction signal is generated.
  • the G correction signal is generated as the B signal value increases or the G signal value decreases.
  • the G correction signal is generated as the B signal value decreases or the G signal value increases.
  • the G correction signal is proportional to the B signal value, is inversely proportional to the G signal value, and the correction signal value and the correction range are appropriately set based on the relationship between the B signal value and the G signal value by the coefficient GK1, It has a tendency to be inversely proportional to the desired coefficient GK2 and proportional to the R control signal. That is, a correction range is appropriately set based on the relationship between the coefficient, the B signal, and the G signal, and is proportional to the B signal value. It is inversely proportional, proportional to the R control signal, and has a tendency to adjust the value by a coefficient.
  • the representative values of the G correction signal generated based on the B signal, the G signal, and the R control signal in this example are the same as those in Table 8.
  • the G correction signal generation means 51 is a lookup table method or a method equivalent thereto, it tends to be proportional to the B signal value and inversely proportional to the G signal value.
  • the G control signal whose magnitude is controlled can be generated.
  • the R correction unit 60 performs correction by adding the R signal from the input terminal 20 based on the R correction signal from the R correction signal generation unit 50, and outputs the corrected signal to the output terminal 70.
  • the G correction unit 61 performs correction by adding the G signal from the input terminal 21 based on the G correction signal from the G correction signal generation unit 51, and outputs the corrected signal to the output terminal 71.
  • the representative values of the R signal corrected by the R correction signal of this example and the representative values of the G signal corrected by the G correction signal are shown in the following Table 9 and FIG.
  • a correction signal related to the magnitude of the values of the R signal and the B signal is generated, and when the G signal is 0, the correction is performed.
  • the control signal for controlling the amount is 1, that is, the G signal is dark blue because there is no G signal, and the R signal is corrected. As the G signal approaches the reference signal value from 0, the correction amount decreases. If the signal value is greater than or equal to the signal value, the control signal for controlling the correction amount is 0, that is, the G signal is equal to or greater than the reference signal value and is not dark blue.
  • a correction signal related to the magnitude of the values of the G signal and the B signal is generated.
  • the control signal for controlling the correction amount is 1, that is, the R signal. Since there is no dark blue, the G signal is corrected and the correction amount decreases each time the R signal approaches the reference signal value from 0.
  • a control signal for controlling the correction amount Is that is, no correction is made because the R signal is greater than the reference signal value and not dark blue.
  • the correction range is set according to the calculation result of (B ⁇ (R ⁇ RK1)), but the R reference set in advance for other R signals. Even if a correction signal is generated with a signal value, for example, an R signal value of less than 102 (40%), the same effect can be obtained. Further, the correction amount is determined by the calculation result of ((B ⁇ (R ⁇ RK1)) ⁇ RK2) ⁇ G control signal, but is proportional to the other B signal value and inversely proportional to the R signal value.
  • a means for adjusting the magnitude by calculating with some coefficients in proportion to the control signal (inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value).
  • An effect is obtained.
  • a new R reference signal value for the R signal is preset in the R correction signal generating means 50, and is proportional to the B signal value and inversely proportional to the R signal value, and the difference between the R signal value and the R reference signal value.
  • a means for adjusting the magnitude by calculating with some coefficients, proportional to the G control signal (inversely proportional to the G signal value and proportional to the difference value between the G signal value and the G reference signal value). The same effect can be obtained.
  • R reference signal value is RS
  • R control signal ((RS ⁇ R) ⁇ RS)
  • R control signal ((RS ⁇ R) ⁇ RS)
  • G reference signal value is GS
  • G control signal ((GS ⁇ G) ⁇ GS)
  • the G control signal is an example of 0 to 1
  • the correction range is set by the calculation result of (B ⁇ (G ⁇ GK1)), but the G reference set in advance for other G signals. Even if the correction signal is generated when the signal value, for example, the G signal value is less than 102 (40%), the same effect can be obtained.
  • the correction amount is determined by the calculation result of ((B ⁇ (G ⁇ GK1)) ⁇ GK2) ⁇ R control signal, but is proportional to the other B signal value and inversely proportional to the G signal value, R
  • a means for adjusting the magnitude by calculating with some coefficients in proportion to the control signal (inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value).
  • An effect is obtained.
  • a new G reference signal value for the G signal is preset in the G correction signal generating means 51, and is proportional to the B signal value and inversely proportional to the G signal value.
  • Proportional to the difference value, proportional to the R control signal (inversely proportional to the R signal value and proportional to the difference value between the R signal value and the R reference signal value), and the size is adjusted by calculation using several coefficients. Similar effects can be obtained as a means.
  • the G reference signal value is GS
  • G control signal ((GS ⁇ G) ⁇ GS)
  • R reference signal value is RS
  • R control signal ((RS ⁇ R) ⁇ RS)
  • the R control signal is an example of 0 to 1
  • RS is a preset reference signal value 102
  • GS is a preset reference signal value 102
  • GK2 is a desired coefficient
  • the G control signal generated based on the G signal value and the G reference signal value the correction signal generated by the R signal value and the B signal value
  • This corrects only dark blue generates an R correction signal that tends to be proportional to the B signal value and inversely proportional to the R signal value or the G signal value.
  • a correction added to the signal is performed to change the appearance of blue. That is, the larger the B signal value, which is dark blue, or the smaller the R signal value or G signal value, the larger the R correction signal is added. Conversely, the smaller the B signal value, or the larger the R signal value or G signal value, the smaller the correction amount.
  • the correction amount is set according to the R control signal generated based on the R signal value and the R reference signal value, and the correction signal generated based on the G signal value and the B signal value. It can be corrected by changing. This corrects only dark blue, generates a G correction signal that tends to be proportional to the B signal value and is inversely proportional to the R signal value or the G signal value. A correction added to the signal is performed to change the appearance of blue. That is, as the B signal value, which is dark blue, increases, or as the R signal value or G signal value decreases, a larger correction amount of G correction signal is added.
  • the smaller the B signal value, or the larger the R signal value or the G signal value the smaller the correction amount.
  • the R signal is greater than the desired reference signal value, no correction signal is generated. For this reason, a person suffering from third color blindness is effectively corrected in an area where it is difficult to discern, and an area where the R signal or G signal is greater than a desired reference signal value is not corrected, so that a healthy person also feels strange
  • An image signal correction method is executed that makes it possible to achieve both reduction in the size of the image signal.
  • the number of quantization bits representing the three primary color signals is a desired number of bits other than 8 bits, or a desired number of bits other than 8 bits, and a quantization method including a sign bit that can represent negative However, the same effect can be obtained.
  • the control signal generation means and the correction signal generation means can perform desired correction by using an input / output comparison table to correct digitized gradation data, which is a lookup table method, to an arbitrary gradation.
  • an input / output comparison table to correct digitized gradation data, which is a lookup table method, to an arbitrary gradation.
  • it is possible to generate a correction value having a desired linear or curvilinear output characteristic with respect to the input and it is possible to generate a correction signal in which the value is uniquely determined for the input and the output, and the same effect can be obtained.
  • the color space represented by the image signal is an sRGB color system and a color system that can be uniquely converted, for example, an RGBA color system, a YIQ color system, a YCbCr color system, or a YPbPr color system, Alternatively, the same effect can be obtained even when correction is performed in the XYZ color system, the xyY color system, or the xvYCC color system.
  • the above embodiment can be applied to the case of using other colors. For example, similar image signal processing corresponding to weak colors can be performed for yellow, magenta, cyan, and the like used for image formation.
  • the desired color signal value and the color signal value other than the desired color signal are changed.
  • a corresponding correction signal is generated, and the magnitude of the correction signal is controlled by a control signal generated from a color signal value other than the two colors and a desired reference signal value, and the input image signal is corrected and output. Since this is the operation method of the image signal correction means to Only the dark red is corrected, and a G correction signal or B correction signal that tends to be proportional to the R signal value and inversely proportional to the G signal value or the B signal value is generated.
  • the correction of adding to the G signal or the correction of adding the B correction signal to the B signal can be performed to change the appearance of red. For this reason, since the person who suffers from the first color blindness is effectively corrected in the hard-to-see area that is difficult to discriminate, and is not corrected in the area where the G signal or the B signal is higher than the desired reference signal value, the healthy person also feels uncomfortable. It is possible to execute an image signal correction method that makes it possible to achieve both reduction in the size of the image signal. Furthermore, correction is performed only for dark green, and a B correction signal that tends to be proportional to the G signal value and inversely proportional to the R signal value or the B signal value is generated, and this B correction signal is converted into the B signal.
  • Correction of adding a signal to the R signal or correction of adding a G correction signal to the G signal can be performed to change the appearance of blue. For this reason, a person suffering from third color blindness is effectively corrected in an area where it is difficult to discern, and an area where the R signal or G signal is higher than the desired reference signal value is not corrected, so that a healthy person also feels uncomfortable. Therefore, it is possible to execute an image signal correction method that makes it possible to achieve both reduction in the size of the image signal.
  • an image display that is difficult to distinguish and difficult to see for persons suffering from the first color blindness or the third color blindness is effectively color-corrected only in a difficult-to-see region that is difficult to distinguish, and a region that is greater than a desired reference signal value Then, since the correction is not performed, it is possible to provide a display device characterized in that both a sense of incongruity can be reduced for a healthy person and that both can be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Health & Medical Sciences (AREA)
  • Color Image Communication Systems (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Image Processing (AREA)

Abstract

Pour les patients atteints de protanopie, le rouge foncé (R = 255, V = 0, B = 0) apparaît pratiquement noir, ne pouvant être distingué du noir. Le vert foncé du système de couleurs chaudes est difficile à distinguer du brun. La présente invention concerne un procédé d’utilisation d’un moyen de correction de signaux d’images qui est caractérisé en ce que, si un signal d’entrée représente du rouge foncé, le signal est corrigé pour générer ainsi un signal d’image présentant un désagrément moindre également pour les personnes n’ayant pas de déficience, par l’utilisation d’un moyen de génération de signal de commande qui commande la magnitude d’une valeur de signal de correction dans un stade ultérieur de façon à corriger le rouge foncé en rouge légèrement mélangé à du blanc (R = 255, V = 51, B = 51) ou en vermillon dont la longueur d’onde est plus courte (vers l’orange) (R = 255, V = 51, B = 0), d’un moyen de génération de signal de correction qui génère un signal de correction, et d’un moyen de correction qui corrige le signal d’entrée avec le signal de correction et émet le signal corrigé.
PCT/JP2009/060254 2008-06-08 2009-06-04 Procédé de correction d’un signal d’image WO2009150993A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2008150001 2008-06-08
JP2008-150001 2008-06-08
JP2009065908A JP4360655B1 (ja) 2008-06-08 2009-03-18 画像信号補正方法
JP2009-065908 2009-03-18

Publications (1)

Publication Number Publication Date
WO2009150993A1 true WO2009150993A1 (fr) 2009-12-17

Family

ID=41393518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/060254 WO2009150993A1 (fr) 2008-06-08 2009-06-04 Procédé de correction d’un signal d’image

Country Status (2)

Country Link
JP (1) JP4360655B1 (fr)
WO (1) WO2009150993A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11175050A (ja) * 1997-12-16 1999-07-02 Hitachi Ltd 色覚障害者用表示システム
JP2000306074A (ja) * 1999-04-20 2000-11-02 Ntt Data Corp 色覚障害者用カラーパレット生成方法及び方式
JP2006157301A (ja) * 2004-11-26 2006-06-15 Ryobi System Solutions:Kk 画素処理装置
WO2008032528A1 (fr) * 2006-09-13 2008-03-20 Konica Minolta Holdings, Inc. procédé de conversion d'image, dispositif de conversion d'image et programme de conversion d'image
JP4139433B1 (ja) * 2007-05-15 2008-08-27 スクルド・エンタープライズ有限会社 画像信号補正方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11175050A (ja) * 1997-12-16 1999-07-02 Hitachi Ltd 色覚障害者用表示システム
JP2000306074A (ja) * 1999-04-20 2000-11-02 Ntt Data Corp 色覚障害者用カラーパレット生成方法及び方式
JP2006157301A (ja) * 2004-11-26 2006-06-15 Ryobi System Solutions:Kk 画素処理装置
WO2008032528A1 (fr) * 2006-09-13 2008-03-20 Konica Minolta Holdings, Inc. procédé de conversion d'image, dispositif de conversion d'image et programme de conversion d'image
JP4139433B1 (ja) * 2007-05-15 2008-08-27 スクルド・エンタープライズ有限会社 画像信号補正方法

Also Published As

Publication number Publication date
JP4360655B1 (ja) 2009-11-11
JP2010021986A (ja) 2010-01-28

Similar Documents

Publication Publication Date Title
KR100834762B1 (ko) 이 기종간 색역 사상 방법 및 장치
EP2023642B1 (fr) Dispositif d'affichage d'image couleur et dispositif de conversion de couleur
US7583838B2 (en) Color saturation adjusting apparatus and method used for a display system
JP4495126B2 (ja) 特定の色属性を調整する装置とその方法
EP2487892A1 (fr) Procédé et appareil de conversion d'images à contrôle de luminosité
JP5370761B2 (ja) 映像信号処理装置および表示装置
JP5495338B2 (ja) 画像信号処理装置及び画像信号処理方法
KR20170102638A (ko) 디스플레이 장치의 색상 조정 방법 및 장치
JPH0657047B2 (ja) 彩度調整方法及び装置
JP4139433B1 (ja) 画像信号補正方法
JP4360655B1 (ja) 画像信号補正方法
JP2010130562A (ja) 色域拡大方法および表示装置
EP1895781B1 (fr) Dispositif et procédé de réglage de la saturation de couleur
JP2008289168A (ja) 画像信号補正方法
JP2001518248A (ja) カラーリーガライゼーション
KR100463831B1 (ko) 인간 시각 특성을 이용한 최적화 화질 추출장치 및 방법
CN112581390A (zh) 一种图像色彩增强方法、装置、设备及可读存储介质
EP3503017A1 (fr) Procédé et dispositif d'affichage
US6829061B1 (en) Method for determining gray levels in a printer
JP2005328276A (ja) カラー画像形成システム
KR20140078571A (ko) 영상 처리 장치, 영상 처리 방법 및 프로그램
JP5476108B2 (ja) 表示装置
JP2008281819A (ja) カラー表示装置
Faust Enhanced Color-to-Gray Conversion
JP3987077B2 (ja) 色彩画像調整方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09762423

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09762423

Country of ref document: EP

Kind code of ref document: A1