CN107734314B - Image processing apparatus and optical projection system - Google Patents
Image processing apparatus and optical projection system Download PDFInfo
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- CN107734314B CN107734314B CN201610655292.1A CN201610655292A CN107734314B CN 107734314 B CN107734314 B CN 107734314B CN 201610655292 A CN201610655292 A CN 201610655292A CN 107734314 B CN107734314 B CN 107734314B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
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- Color Image Communication Systems (AREA)
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- Facsimile Image Signal Circuits (AREA)
Abstract
The present invention relates to a kind of image processing apparatus and including the optical projection system of the image processing apparatus.Described image processing unit includes light emitting device, image processing apparatus and light valve.Wherein, light emitting device is for being emitted at least the first, second two kinds of color lights, image processing apparatus is for obtaining and analyzing every frame input image data, and it is adjusted for the grayscale value for meeting predetermined condition in input picture, light valve is used to modulate the light of the light emitting device outgoing according to described image processing unit grayscale value adjusted, to form display image.
Description
Technical field
The present invention relates to projection art, in particular to a kind of image processing apparatus and optical projection system.
Background technique
Existing optical projection system generally comprises light emitting device, light valve and image processing apparatus, the light emitting device outgoing is red,
Green, blue three-color light, described image processing unit, which obtains input image data and controls the light valve, receives described three kinds
Color light and according to input image data modulation image.However, the light emitting device is because fluorescent powder efficiency is bad and aging etc.
Reason is frequently present of the problem of certain color of light insufficient (such as red light is insufficient), influences the projected picture effect of the optical projection system
Fruit.
Summary of the invention
To solve the bad technical problem of prior art projection systems project picture effect, it is necessary to provide a kind of picture effect
The preferable image processing apparatus of fruit.
Further, a kind of optical projection system including aforementioned image processing apparatus is provided.
A kind of image processing apparatus, for obtaining the image data of image to be displayed, described image data include it is described to
It shows the grayscale value of the first color of the pixel of image and is different from least one second color of first color
Grayscale value, the collection region of the first color according to image to be displayed described in described image data acquisition, the pooling zone
The grayscale value of the first color of pixel is higher than one first preset gray scale value in domain, and the area of the collection region is greater than one in advance
If area, the color grayscale value of the pixel of the peripheral region of collection region described in the image to be displayed is adjusted to be formed and be adjusted
Image data after whole so that the grayscale value of the pixel of the peripheral region first color adjusted and it is described at least
A kind of ratio of the grayscale value of second color before adjustment compared to becoming smaller.The image data adjusted is for exporting to light valve
With modulation image.
Preferably, described image processing unit is by the grayscale of corresponding first color of pixel in the peripheral region
Value is adjusted to the first color adjustment grayscale value, and the first color adjustment grayscale value is less than the grayscale value of first color, and
The first color adjustment grayscale value is the grayscale value of first color and the difference of one first reference grayscale value.
Preferably, described image processing unit gradually adjusts the peripheral region along the pointing needle far from the collection region
The grayscale value of whole first color, and described first gradually becomes smaller with reference to grayscale value along the direction far from the collection region.
Preferably, the first of each pixel of the peripheral region is equal with reference to grayscale value.
Preferably, described first is the average value and one of grayscale value before the corresponding adjustment of first color with reference to grayscale value
The product of regulation coefficient, the regulation coefficient are more than or equal to 1/4 and are less than or equal to 1/2.
Preferably, described image processing unit is by corresponding at least one second face of pixel in the peripheral region
Color grayscale value is adjusted to the second color adjustment grayscale value, and the original gray-scale value of second color is greater than described at least one second
Color grayscale value, and second color adjustment grayscale value is the original gray-scale value and one second of at least one second color
With reference to the sum of grayscale value.
Preferably, it described second is gradually become smaller with reference to grayscale value along the direction far from the collection region.
Preferably, described the second of each pixel of the peripheral region is equal with reference to grayscale value.
Preferably, described second with reference to grayscale value be before at least one second color adjusts the average value of grayscale value with
The product of one regulation coefficient, the regulation coefficient are more than or equal to 1/4 and are less than or equal to 1/2.
Preferably, if grayscale value and described second before at least one second color adjustment are super with reference to the sum of grayscale value
The highest grayscale value of at least one second color is crossed, then using the highest grayscale value of at least one second color as institute
State the second color adjustment grayscale value.
Preferably, the first color is stated as red, and at least one second color is green or blue.
Preferably, the peripheral region is adjacent and is surrounded on the outside of the collection region, and the peripheral region lateral profile with
The profile in the outside of the collection region is consistent.
A kind of optical projection system, including aforementioned image processing apparatus and a light emitting device and a light valve, the light emitting device
For being emitted the light of first color and at least one second color, the light valve is used for according to described image processing dress
The light that grayscale value adjusted modulates the light emitting device outgoing is set, to form display image.
Compared with prior art, described image processing unit is by the ash of the pixel of the peripheral region of the collection region
Rank value adjustment, so that the average value of the first color adjustment grayscale value of each pixel of the peripheral region and the second color adjust
Ratio between the average value of grayscale value reduces, and then the first colour brightness of the peripheral region of the collection region reduces or the
Second colors brightness increases, and according to the visual characteristic of human eye, the color degree of comparison of the collection region and its peripheral region increases, and makes
User's visual effect that the first color for obtaining the collection region is brighter, improves primary the first color of light of electro-optical device deficiency and leads
Cause the problem of influencing the projected picture effect of the optical projection system.
Detailed description of the invention
Fig. 1 is the schematic diagram of optical projection system in first embodiment of the invention.
Fig. 2 is the planar structure schematic diagram of colour wheel shown in Fig. 1.
Fig. 3 is the schematic diagram of a frame input picture to be shown.
Fig. 4 is to correspond to red pixel shown in Fig. 3 to carry out color adjustment compensation schematic diagram.
Main element symbol description
| Optical projection system | 100 |
| Light emitting device | 10 |
| Light source | 11 |
| Colour wheel | 13 |
| Dodging device | 15 |
| Light valve | 20 |
| Image processing apparatus | 30 |
| Control mould group | 31 |
| Image analysis mould group | 35 |
| Projection lens | 40 |
| Input picture | a |
| First sub-frame images | a1 |
| Second sub-frame images | a2 |
| Third sub-frame images | a3 |
| Collection region | 91 |
| Peripheral region | 93 |
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out specific
Description.
Referring to Fig. 1, Fig. 1 is the schematic diagram of optical projection system 100 in first embodiment of the invention.Embodiment of the present invention
There is provided a kind of optical projection system 100 comprising light emitting device 10, light valve 20, image processing apparatus 30 and projection lens 40.It shines
Device 10 is for being emitted and providing display light, wherein light emitting device 10 at least provides the light and at least one of the first color
The light of the second color of kind.Light valve 20 is for being selectively provided to projection lens for light under the control of image processing apparatus 30
40 perform image display.In present embodiment, the optical projection system 100 further includes the necessity such as projection screen or non-essential structure
Feature, therefore not to repeat here.
In present embodiment, the light emitting device 10 is emitted the first color, the second color and three kinds of colors of third color
Light.Specifically, light emitting device 10 includes light source 11, colour wheel 13 and dodging device 15.The light source 11 swashs for generating one
It shines, it is preferred that the exciting light is ultraviolet light.The light source 11 can be light emitting diode, laser diode or other solid
State light source.Colour wheel 13 is used for the excitation according to 11 emergent rays of light source to which outgoing is different from the light of 11 wavelength of light of light source
Line.Dodging device 15 is for receiving the light that colour wheel 13 is emitted, so that equalizing light rays.
Specifically, referring to Fig. 2, wherein, Fig. 2 is the planar structure schematic diagram of colour wheel 13 shown in Fig. 1.On the colour wheel 13
Carry wavelength conversion material.The colour wheel 13 is rotated by the driving of a driving device (not shown).
The colour wheel 13 is a colour wheel structure substantially in the form of annular discs comprising first the 131, second segmentation of segmentation 133, the
Three segmentations 135, described three are segmented into the identical sector structure of size.
Wherein, three are corresponded on colour wheel 13 and different wave length transition material is respectively set, wherein the first segmentation 131 can
Convert incident light into the first color light；Incident light can be switched to the second color light by the second segmentation 133；Third segmentation 135
Third color light can be converted incident light into.The wavelength conversion material can be fluorescent powder, quanta point material or can incite somebody to action
Exciting light is converted into the other materials of the stimulated light of appropriate color.
In present embodiment, first color light is feux rouges, and second color light is green light, the third face
Coloured light line is blue light.In present embodiment, the first color light wavelength conversion material layer be red fluorescence powder, described second
Color light wavelength conversion material layer is green emitting phosphor, and the third color light wavelength conversion material layer is blue-fluorescence
Powder.
Ground is changed, in other embodiments of the present invention, when light source 11 is blue excitation light source, colour wheel 13 is corresponding
Third segmentation 133 can need not the setting fluorescent powder of wavelength convert, it is only necessary to be arranged scattering material make from colour wheel 13 the
The blue light of three segmentation outgoing is more uniform or third segmentation 133 is directly disposed as light-transmitting layer, so that light source 11 is emitted
Light.
The light valve 20 is located in the transmission path of the light of the colour wheel 13 outgoing.The light energy that the colour wheel 13 is emitted
Enough it is incident on the light valve 20.Through modulated first color light of the light valve 20, the second color light, third color light
It reaches projection lens and carries out projection-display image.It is appreciated that the light valve 20 can be liquid crystal display die set (Liquid
Crystal Display, LCD), reflection-type display module (Liquid of the liquid crystal display die set in conjunction with CMOS integrated circuit
Crystal on Silicon, LCoS), data micro-mirror device (Digital Micromirror Device, DMD) etc..
Described image processing unit 30 includes control mould group 31 and image analysis mould group 35.The control mould group 31 is to open
Open or close the movement of colour wheel 13 described in the light source 11, drive control and image modulation.
Described image parses mould group 35 and receives picture signal, and is parsed to obtain in each frame image to be shown
The corresponding image data of each pixel, wherein the image data includes each pixel in image to be shown
The grayscale value of corresponding each color.Further, output signal of the described image parsing mould group 35 also according to control mould group 31 is to institute
It states image data and is modulated processing.
Wherein, described image parsing mould group 35 obtains image data, and described image data include the image to be shown
Pixel the first color grayscale value and be different from first color at least one second color grayscale value.This
In embodiment, described image data include that the first color of each pixel of image, the second color are corresponding with third color
Grayscale value.
Referring to Fig. 3, Fig. 3 is the schematic diagram of a frame input picture to be shown.Wherein, each frame input figure to be shown
As a includes the first sub-frame images a1, the second sub-frame images a2 and third sub-frame images a3 of different colours.Wherein, the first son
The red pixel of corresponding first color of frame image a1, the green pixel of corresponding second color of the second sub-frame images a2, third subframe
Image a3 corresponds to the blue pixel of third color.It is appreciated that the first sub-frame images a1, the second sub-frame images a2 and third
Frame image a3 combination constitutes input picture a to be shown, and realizes colored display, meanwhile, three sub-frame images are pressed
Projection lens 40 is transmitted separately to according to time sequencing.
Further, referring to Fig. 4, wherein, Fig. 4 is to be adjusted for the corresponding grayscale of the first colored pixels shown in Fig. 3
Compensate schematic diagram.
Firstly, corresponding input picture a defines a collection region 91, the first face of the corresponding input picture continuous image vegetarian refreshments
The area that color original gray-scale value is above region shared by one first preset gray scale and the continuous image vegetarian refreshments is greater than a preset area,
In other words, the grayscale value for collection region 91 being corresponded in the first sub-frame images a1 is above first preset gray scale.
It is appreciated that collection region 91 it is corresponding three the first sub-frame images of sub-frame images a1, the second sub-frame images a2 with
And the coordinate position of third sub-frame images a3 is identical.It should be noted that collection region 91 is in input picture in present embodiment
Coordinate position is only to illustrate in a, and in other embodiments of the present invention, collection region 91 can be positioned at any of input picture a
Position, it's not limited to that, meanwhile, the quantity of collection region 91 is not limited only to 1 yet, and quantity can also be 2,3
A or other quantity.
Further, definition is adjacent and ring seal surrounds the region of the collection region 91 as peripheral region 93, and should
The lateral profile of peripheral region 93 is consistent with the profile in 91 outsides of the collection region, that is to say the outboard wheel of the peripheral region 93
It is wide identical and of different sizes as the chamfered shape in 91 outsides of the collection region, in other words, the wheel in 91 outsides of the collection region
Exterior feature is that the lateral profile equal proportion of the peripheral region 93 expands to be formed.Ground is changed, in other change embodiments of the present invention,
Peripheral region 93 also may not need the encirclement collection region 91 of closure.
Described image parsing mould group 35 is parsed according to input image data, therefore, it is determined that whether collection region 91 meets
The area that first color original gray-scale value is above region shared by first preset gray scale and continuous image vegetarian refreshments is greater than described
Preset area.When collection region 91 meets aforementioned condition, then image analysis mould group 35 exports a first adjustment signal to control
Mould group 31 controls mould group 31 then according to the first adjustment signal to second, third color original gray-scale value in peripheral region 93
It is adjusted, to reach the brightness ratio reduced in peripheral region 93 between first color and the second color, third color, example
Such as reduce the grayscale value of the first color, or increase the grayscale value of the second color, third color, otherwise, when collection region 91 simultaneously
When not meeting aforementioned condition, control mould group 31 is with image analysis mould group 35 and without externally enclosing the first color, second in region 93
Color, the original gray-scale value of third color are adjusted.
The average value and other colors of the first color original gray-scale value are defined, such as the second color or third color is original
Ratio between the average value of grayscale value is the first initial value.When control mould group 31 receives the first adjustment signal, then
First initial value is adjusted to the first adjustment value, wherein the first adjustment value is less than first initial value.
Specifically, the first color original gray-scale value of the corresponding at least pixel of peripheral region 93 is adjusted to the first face
Color adjustment grayscale value, so that the average value and second of the first color adjustment grayscale value of each pixel of the peripheral region 93
It is the first adjustment value that color, third color, which adjust the ratio between the average value of grayscale value,.
For first color adjustment grayscale value less than the first color original gray-scale value, the first color adjusted value can be the
The difference of one color original gray-scale value and one first reference grayscale value, wherein the first reference grayscale value is positive integer.As a result,
The corresponding grayscale value of the first color after being adjusted in peripheral region 93 is small compared to the grayscale value before adjustment, so that outside
Enclose in region 93 first color compared to the second color, the brightness ratio of third color is opposite reduces, then the in collection region 91
The brightness value of one color increases relative to peripheral region 93, to reach the visually benefit to collection region 91 to the first color
It repays, improves the visual effect of the first color.
In present embodiment, described first is gradually become smaller with reference to grayscale value along the direction far from the collection region 91, from
And the first colour vision effect is made to obtain gentle compensation transition.
Ground is changed, corresponding first is equal with reference to grayscale value in peripheral region 93, and the size of the first reference grayscale value
It can be selected according to the practical adjustment effect of image, the first reference grayscale value is the first color original gray-scale value
1/2,1/3 or the 1/4 of average gray-scale value.In other words, if the average gray-scale value of the first color original gray-scale value is Y1, the
One reference grayscale value is the average value Y1 of the first color original gray-scale value and the product of a regulation coefficient, and the regulation coefficient is greater than
Equal to 1/4 and it is less than or equal to 1/2.Since corresponding first is equal with reference to grayscale value in peripheral region 93, image can be effectively reduced
Parse the data processing complexity of mould group 35.
Ground is changed, in second embodiment of the invention, by the second of the corresponding at least pixel of peripheral region 93
Color original gray-scale value adjusts to the second color and adjusts grayscale value, so that the first face of each pixel of the peripheral region 93
Ratio between the average value of color adjustment grayscale value and the average value of the second color adjustment grayscale value is the first adjustment value.Its
In, the second color adjusts grayscale value and is greater than the second color original gray-scale value, and the second color adjusted value can be former for the second color
Beginning grayscale value refers to the sum of being superimposed for grayscale value with one second.It is appreciated that described second is also positive integer with reference to grayscale value.
The corresponding grayscale value of the second color after being adjusted in peripheral region 93 as a result, is compared to the grayscale value before adjustment
Greatly, so that the brightness of first color is opposite with the second color-ratio in peripheral region 93 reduces, then the in collection region 91
The brightness value of one color increases relative to peripheral region 93, is visually reached collection region 91 to the first color with reaching
Compensation improves the visual effect of the first color.
In present embodiment, described second is gradually become smaller with reference to grayscale value along the direction far from the collection region 91, with
So that the first colour vision effect obtains gentle compensation transition.
Preferably, when the second color original gray-scale value and described second are greater than the second color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using the second color highest grayscale as the second color.
Preferably, each pixel corresponding second is equal with reference to grayscale value in peripheral region 93, and second refers to grayscale
The size of value can be selected according to the practical adjustment effect of image, and described second is original for second color with reference to grayscale value
1/2,1/3 or the 1/4 of the average gray-scale value of grayscale value, if the average gray-scale value of the second color original gray-scale value is Y2, the
Two reference grayscale values are the average value Y2 of the second color original gray-scale value and the product of a regulation coefficient, and the regulation coefficient is greater than
Equal to 1/4 and it is less than or equal to 1/2.Each pixel corresponding second is equal with reference to grayscale value in peripheral region 93, to reduce figure
As the data processing complexity of parsing mould group 35.
Ground is changed, in third embodiment of the invention, by the third of the corresponding at least pixel of peripheral region 93
Color original gray-scale value adjusts to third color and adjusts grayscale value, so that the first face of each pixel of the peripheral region 93
Ratio between the average value of average value and third color the adjustment grayscale value of color adjustment grayscale value is the first adjustment value.Its
In, third color adjusts grayscale value and is greater than third color original gray-scale value, and the third color adjusted value can be former for third color
Beginning grayscale value and a third are with reference to the sum of grayscale value.It is appreciated that the third is also positive integer with reference to grayscale value.
The corresponding grayscale value of third color after being adjusted in peripheral region 93 as a result, is compared to the grayscale value before adjustment
Greatly, so that in peripheral region 93 brightness of first color it is opposite with third color-ratio reduce so that in collection region 91
The brightness value of first color increases relative to peripheral region 93, to visually reach collection region 91 to the first color
Compensation improves the visual effect of the first color.
In present embodiment, the third is gradually become smaller with reference to grayscale value along the direction far from the collection region.
Preferably, when third color original gray-scale value and the third are greater than third color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using third color highest grayscale as third color.
Preferably, the corresponding third of each pixel is equal with reference to grayscale value in peripheral region 93, and third refers to grayscale
The size of value can be selected according to the practical adjustment effect of image, and the third is that the third color is original with reference to grayscale value
1/2,1/3 or the 1/4 of the average gray-scale value of grayscale value, if the average gray-scale value of third color original gray-scale value is Y3, the
Three reference grayscale values are the average value Y3 of third color original gray-scale value and the product of a regulation coefficient, and the regulation coefficient is greater than
Equal to 1/4 and it is less than or equal to 1/2.The corresponding third of each pixel is equal with reference to grayscale value in peripheral region 93, to reduce figure
As the data processing complexity of parsing mould group 35.
Ground is changed, in four embodiment of the invention, by the corresponding at least pixel of peripheral region 93 corresponding the
Second colors original gray-scale value adjusts to the second color and adjusts grayscale value, and third color original gray-scale value is adjusted to third face
Color adjustment grayscale value, so that the average value and the of the first color adjustment grayscale value of each pixel of the peripheral region 93
Two, the ratio between the average value of third color adjustment grayscale value is the first adjustment value.Wherein, the second color adjusts grayscale
Value is greater than the second color original gray-scale value, and the second color adjusted value can be the second color original gray-scale value and second ginseng
The sum of grayscale value is examined, the third color adjustment grayscale value is greater than third color original gray-scale value, the third color adjusted value
It can be third color original gray-scale value and the third with reference to the sum of grayscale value.
The rear corresponding grayscale value of second, third color is adjusted in peripheral region 93 as a result, compared to the ash before adjustment
Rank value is big, reduces so that the brightness of first color is opposite with second, third color-ratio in peripheral region 93, so that collecting
The brightness value of first color increases relative to peripheral region 93 in region 91, to visually reach collection region 91 to the
The compensation of one color improves the visual effect of the first color.
In present embodiment, described second, third is gradually become smaller with reference to grayscale value along the direction far from the collection region.
Preferably, when the second color original gray-scale value and described second are greater than the second color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using the second color highest grayscale as the second color.Meanwhile when third color is former
Beginning grayscale value and the third are greater than third color highest grayscale value with reference to the sum of grayscale value, i.e. when 255 grayscale, then by third face
Color highest grayscale adjusts grayscale value as third color.
Preferably, each pixel corresponding second is equal with reference to grayscale value in peripheral region 93, and each pixel is corresponding
Third it is equal with reference to grayscale value, and second, third can be carried out with reference to size of grayscale value according to the practical adjustment effect of image
Selection, for example, may respectively be the first, second, third color original gray-scale value average gray-scale value 1/2,1/3 or 1/
4, to reduce the data processing complexity of image analysis mould group 35.
Ground is changed, it is in fifth embodiment of the invention, the corresponding at least pixel of peripheral region 93 is corresponding
First color original gray-scale value adjusts to the first color and adjusts grayscale value, meanwhile, the second color original gray-scale value is adjusted to the
Second colors adjust grayscale value so that each pixel of the peripheral region 93 the first color adjustment grayscale value average value with
It is the first adjustment value that second color, which adjusts the ratio between the average value of grayscale value,.Wherein, the first color adjusts grayscale value
Less than the first color original gray-scale value, the first color adjusted value can refer to grayscale with first for the first color original gray-scale value
The difference of value, meanwhile, the second color adjusts grayscale value and is greater than the second color original gray-scale value, and the second color adjusted value can be the
Second colors original gray-scale value is with one second with reference to the sum of grayscale value.
The corresponding grayscale value of the first color after being adjusted in peripheral region 93 as a result, is compared to the grayscale value before adjustment
It is small, and the corresponding grayscale value of the second color is big compared to the grayscale value before adjustment, so that the first color in peripheral region 93
Brightness it is opposite with the second color-ratio reduce so that the brightness value of first color is relative to peripheral region 93 in collection region 91
Increase, to visually reach the compensation to the first color to collection region 91, improves the visual effect of the first color.
In present embodiment, described first and second is gradually become smaller with reference to grayscale value along the direction far from the collection region.
Preferably, when the second color original gray-scale value and described second are greater than the second color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using the second color highest grayscale as the second color.
Preferably, each pixel corresponding first is equal with reference to grayscale value in peripheral region 93, and each pixel is corresponding
It is second equal with reference to grayscale value, and first, second can carry out with reference to the size of grayscale value according to the practical adjustment effect of image
Selection, for example, may respectively be the first, second color original gray-scale value average gray-scale value 1/2,1/3 or 1/4, to subtract
The data processing complexity of small image analysis mould group 35.
Ground is changed, it is in sixth embodiment of the invention, the corresponding at least pixel of peripheral region 93 is corresponding
First color original gray-scale value adjusts to the first color and adjusts grayscale value, meanwhile, third color original gray-scale value is adjusted to the
Three colors adjust grayscale value so that each pixel of the peripheral region 93 the first color adjustment grayscale value average value with
It is the first adjustment value that third color, which adjusts the ratio between the average value of grayscale value,.Wherein, the first color adjusts grayscale value
Less than the first color original gray-scale value, the first color adjusted value can refer to grayscale with first for the first color original gray-scale value
The difference of value, meanwhile, third color adjusts grayscale value and is greater than third color original gray-scale value, and the third color adjusted value can be the
Three color original gray-scale values and a third are with reference to the sum of grayscale value.
The corresponding grayscale value of the first color after being adjusted in peripheral region 93 as a result, is compared to the grayscale value before adjustment
It is small, and the corresponding grayscale value of third color is big compared to the grayscale value before adjustment, so that the first color in peripheral region 93
Brightness it is opposite with third color-ratio reduce so that the brightness value of first color is relative to peripheral region 93 in collection region 91
Increase, to visually reach the compensation to the first color to collection region 91, improves the visual effect of the first color.
In present embodiment, described first and third is gradually become smaller with reference to grayscale value along the direction far from the collection region.
Preferably, when third color original gray-scale value and the third are greater than third color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using third color highest grayscale as third color.
Preferably, each pixel corresponding first is equal with reference to grayscale value in peripheral region 93, and each pixel is corresponding
Third it is equal with reference to grayscale value, and first, third can be carried out with reference to the size of grayscale value according to the practical adjustment effect of image
Selection, for example, may respectively be described first, third color original gray-scale value average gray-scale value 1/2,1/3 or 1/4, to subtract
The data processing complexity of small image analysis mould group 35.
Ground is changed, it is in seventh embodiment of the invention, the corresponding at least pixel of peripheral region 93 is corresponding
First color original gray-scale value adjusts to the first color and adjusts grayscale value, meanwhile, the second color original gray-scale value is adjusted to the
Second colors adjust grayscale value, and third color original gray-scale value is adjusted to third color and adjusts grayscale value, so that described
The average value of the first color adjustment grayscale value of each pixel of peripheral region 93 and putting down for second, third color adjustment grayscale value
Ratio between mean value is the first adjustment value.Wherein, the first color adjustment grayscale value is less than the first color original gray-scale value,
The first color adjusted value can be the difference of the first color original gray-scale value and the first reference grayscale value, meanwhile, the second color tune
Whole grayscale value be greater than the second color original gray-scale value, the second color adjusted value can for the second color original gray-scale value with it is described
Second is greater than third color original gray-scale value, the third color with reference to the sum of grayscale value, the third color adjustment grayscale value
Adjusted value can be third color original gray-scale value and the third with reference to the sum of grayscale value.
The corresponding grayscale value of the first color after being adjusted in peripheral region 93 as a result, is compared to the grayscale value before adjustment
It is small, and the corresponding grayscale value of second, third color is big compared to the grayscale value before adjustment, so that first in peripheral region 93
The brightness of color it is opposite with second, third color-ratio reduce so that in collection region 91 first color brightness value relative to
Peripheral region 93 increases, to visually reach the compensation to the first color to collection region 91, improves the view of the first color
Feel effect.
In present embodiment, the direction of the first, second, third reference grayscale value edge far from the collection region is gradually
Become smaller.
Preferably, when the second color original gray-scale value and described second are greater than the second color most high ash with reference to the sum of grayscale value
When rank value, i.e. 255 grayscale, then grayscale value is adjusted using the second color highest grayscale as the second color.Meanwhile when third color is former
Beginning grayscale value and the third are greater than third color highest grayscale value with reference to the sum of grayscale value, i.e. when 255 grayscale, then by third face
Color highest grayscale adjusts grayscale value as third color.
Preferably, each pixel corresponding first is equal with reference to grayscale value in peripheral region 93, and each pixel is corresponding
It is second equal with reference to grayscale value, the corresponding third of each pixel is equal with reference to grayscale value, and the first, second, third reference
The size of grayscale value can be selected according to the practical adjustment effect of image, such as may respectively be first, second, third face
1/2,1/3 or the 1/4 of the average gray-scale value of color original gray-scale value, to reduce the data processing complex of image analysis mould group 35
Degree.
Compared with prior art, the optical projection system 100 is by the pixel of the peripheral region 93 of the collection region 91
Grayscale value adjustment so that each pixel of the peripheral region 93 the first color adjustment grayscale value average value and the second face
Ratio between the average value of color adjustment grayscale value reduces, and then the first color of the peripheral region 93 of the collection region 91 is bright
Degree reduces or the second colour brightness increases, according to the visual characteristic of human eye, the face of the collection region 91 and its peripheral region 93
Color ratio increases degree, user's visual effect that the first color for obtaining the collection region 91 is brighter, improves due to shining
First color of light deficiency leads to the problem of influencing the projected picture effect of the optical projection system 100 in device 10.
Claims (13)
1. a kind of image processing apparatus, it is characterised in that:
Described image processing unit is used to obtain the image data of image to be displayed, and described image data include the figure to be shown
The grayscale value of first color of the pixel of picture and be different from first color at least one second color grayscale value,
The collection region of the first color according to image to be displayed described in described image data acquisition, pixel in the collection region
The grayscale value of first color of point is higher than one first preset gray scale value, and the area of the collection region is greater than a preset area,
The color grayscale value for adjusting the pixel of the peripheral region of collection region described in the image to be displayed is adjusted to be formed
Image data, so that the grayscale value of the pixel of the peripheral region first color adjusted and described at least one the
The ratio of the grayscale value of second colors before adjustment compared to becoming smaller；
The image data adjusted is for exporting to light valve with modulation image.
2. image processing apparatus as described in claim 1, it is characterised in that: described image processing unit is by the peripheral region
The grayscale value of corresponding first color of middle pixel is adjusted to the first color adjustment grayscale by the first color original gray-scale value
Value, the first color adjustment grayscale value is less than the first color original gray-scale value, and first color adjusts grayscale value
For the difference of the first color original gray-scale value and one first reference grayscale value.
3. image processing apparatus as claimed in claim 2, it is characterised in that: described image processing unit is collected along far from described
The pointing needle in region gradually adjusts the grayscale value of first color to the peripheral region, and described first refers to grayscale value edge
Direction far from the collection region gradually becomes smaller.
4. image processing apparatus as claimed in claim 2, it is characterised in that: the first of each pixel of the peripheral region
It is equal with reference to grayscale value.
5. image processing apparatus as claimed in claim 2, it is characterised in that: the first reference grayscale value is first face
The product of the average value of grayscale value and a regulation coefficient before the corresponding adjustment of color, the regulation coefficient are more than or equal to 1/4 and are less than
Equal to 1/2.
6. image processing apparatus as described in claim 1, it is characterised in that: described image processing unit is by the peripheral region
The grayscale value of corresponding at least one second color of middle pixel is adjusted to the second color adjustment grayscale value, second face
Color adjustment grayscale value is greater than the original gray-scale value of at least one second color, and second color adjustment grayscale value is institute
The original grayscale value and one second of at least one second color is stated with reference to the sum of grayscale value.
7. image processing apparatus as claimed in claim 6, it is characterised in that: described second with reference to the separate remittance in grayscale value edge
The direction in collection region gradually becomes smaller.
8. image processing apparatus as claimed in claim 6, it is characterised in that: each pixel of the peripheral region it is described
Second is equal with reference to grayscale value.
9. image processing apparatus as claimed in claim 6, it is characterised in that: the second reference grayscale value is described at least one
The average value of grayscale value and the product of a regulation coefficient before the second color of kind adjusts, the regulation coefficient are more than or equal to 1/4 and small
In equal to 1/2.
10. image processing apparatus as claimed in claim 6, it is characterised in that: if before at least one second color adjustment
Grayscale value and described second with reference to the sum of grayscale value be more than at least one second color highest grayscale value, then will be described
The highest grayscale value of at least one second color adjusts grayscale value as second color.
11. image processing apparatus as described in claim 1, it is characterised in that: first color is red, and described at least one
The second color of kind is green or blue.
12. the image processing apparatus as described in claim 1-11 any one, it is characterised in that:
The peripheral region is adjacent and is surrounded on the outside of the collection region, and the peripheral region lateral profile and the collection region
The profile in outside is consistent.
13. a kind of optical projection system, including image processing apparatus described in claim 1-12 any one and a light emitting device
With a light valve, the light emitting device is used to be emitted the light of first color and at least one second color, the light valve
For modulating the light of the light emitting device outgoing according to described image processing unit grayscale value adjusted, to form display figure
Picture.
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| CN201610655292.1A CN107734314B (en) | 2016-08-11 | 2016-08-11 | Image processing apparatus and optical projection system |
| PCT/CN2017/081259 WO2018028237A1 (en) | 2016-08-11 | 2017-04-20 | Image processing device and projection system |
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| CN201610655292.1A CN107734314B (en) | 2016-08-11 | 2016-08-11 | Image processing apparatus and optical projection system |
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| CN109358468A (en) * | 2018-11-30 | 2019-02-19 | 青岛海信激光显示股份有限公司 | A kind of laser light source drive control method and laser projection display method |
| CN109283783A (en) * | 2018-11-30 | 2019-01-29 | 青岛海信激光显示股份有限公司 | A kind of laser projection method and device |
| CN111445825A (en) * | 2020-03-17 | 2020-07-24 | 福建华佳彩有限公司 | Method and device for improving high and low gray scales |
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| WO2018028237A1 (en) | 2018-02-15 |
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