CN113096060A - Positioning method and device for color abnormal lamp beads and storage medium - Google Patents

Positioning method and device for color abnormal lamp beads and storage medium Download PDF

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CN113096060A
CN113096060A CN201911333550.4A CN201911333550A CN113096060A CN 113096060 A CN113096060 A CN 113096060A CN 201911333550 A CN201911333550 A CN 201911333550A CN 113096060 A CN113096060 A CN 113096060A
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display screen
screen image
color
lamp bead
lamp
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CN113096060B (en
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章琦杰
蓝明华
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Hangzhou Hikvision Digital Technology Co Ltd
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Hangzhou Hikvision Digital Technology Co Ltd
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    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/0002—Inspection of images, e.g. flaw detection
    • G06T7/0004—Industrial image inspection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/60—Analysis of geometric attributes
    • G06T7/62—Analysis of geometric attributes of area, perimeter, diameter or volume
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/70—Determining position or orientation of objects or cameras
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/90—Determination of colour characteristics
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/10—Image acquisition modality
    • G06T2207/10024—Color image
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30108—Industrial image inspection
    • G06T2207/30121—CRT, LCD or plasma display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00—Indexing scheme for image analysis or image enhancement
    • G06T2207/30—Subject of image; Context of image processing
    • G06T2207/30242—Counting objects in image
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

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Abstract

The invention provides a method, a device and a storage medium for positioning a lamp bead with abnormal color, wherein the method comprises the following steps: obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified; aiming at a display screen image of which the lamp bead only emits each monochromatic light of RGB three monochromatic lights, the following operations are executed: analyzing and determining the size of each lamp bead in the display screen image, and determining the reference size of each lamp bead in the display screen image according to the size of each lamp bead; performing color extraction based on each monochromatic light of the other two monochromatic lights on the display screen image to obtain an image corresponding to each monochromatic light of the other two monochromatic lights; and performing binarization processing on the image corresponding to each of the other two monochromatic lights, analyzing a communication area in the image after the binarization processing, and determining the position of the color abnormal lamp bead in the display screen image according to the analyzed communication area and the reference size of the lamp bead in the display screen image.

Description

Positioning method and device for color abnormal lamp beads and storage medium
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for positioning a lamp bead with abnormal color and a storage medium.
Background
The conventional lamp bead positioning method is to perform binarization on image data, extract the center of a lamp bead according to a connected domain of the image data after binarization, and then position the center point of the lamp bead in a row-by-row or column-by-column mode according to a certain search step length.
The accuracy of the lamp bead positioning method depends on a given search step length to a certain extent, the search step length is determined according to the lamp distance of the lamp bead image, so that the influence of the size of the actual lamp bead image is large, and after all the lamp beads are positioned, whether the light-emitting color of each lamp bead is normal needs to be further judged, so that the lamp beads with abnormal colors are found out.
Therefore, in the positioning process of the existing color abnormal lamp beads, the searching step length needs to be given, the influence of the size of the image of the actual lamp beads is large, and the color abnormal lamp beads need to be found out after the positions of all the lamp beads are positioned, so that the calculated amount is large, and the detection time is long.
Disclosure of Invention
In view of this, the present invention provides a method, an apparatus, and a storage medium for positioning a color abnormal bead, which do not require a given search step length, are less affected by the size of the actual bead image, and have a smaller calculation amount.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for positioning a color abnormal lamp bead comprises the following steps:
obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified;
aiming at the display screen image that the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB after the display screen is electrified, the following operations are executed:
respectively performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and the reference size of the lamp beads in the display screen image is determined according to the size of each lamp bead in the display screen image.
The utility model provides a positioner of unusual lamp pearl of colour, includes:
the acquisition unit is used for acquiring a display screen image of which the lamp bead only emits each of RGB three monochromatic lights after the display screen is electrified;
the processing unit is used for only emitting display screen images of each of RGB three monochromatic lights to the lamp beads after the display screen is electrified, and executing the following operations:
performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
A non-transitory computer readable storage medium storing instructions which, when executed by a processor, cause the processor to perform the steps in the method of locating a color-anomalous lamp bead as described above.
An electronic device comprising a non-transitory computer readable storage medium, a processor, and a computer program stored on the non-transitory computer readable storage medium and executable on the processor, the processor implementing the following steps when executing the program:
obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified;
aiming at the display screen image that the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB after the display screen is electrified, the following operations are executed:
respectively performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
According to the technical scheme, the display screen image in which the lamp beads in the display screen only emit each of the three RGB monochromatic lights is respectively obtained, the color extraction based on each of the other two monochromatic lights is carried out on the display screen image only emitting each of the three RGB monochromatic lights, and the binarization processing is carried out to enable the lamp beads emitting one of the other two monochromatic lights to be highlighted in the corresponding extracted image, so that the positions of the color abnormal lamp beads in the display screen can be found out from the highlighted connected domain according to the reference size of the lamp beads in the display screen image. It can be seen that in the technical scheme of the invention, the search step length does not need to be given, so that the influence of the size of the actual lamp bead image is small; in addition, the positions of the color abnormal lamp beads in the display screen image can be highlighted through binarization processing only by extracting the color of each monochromatic light in the other two monochromatic lights from the display screen image of each monochromatic light in the RGB three monochromatic lights emitted by the lamp beads, the positions of all the lamp beads are not needed to be positioned in the whole process, and therefore the calculation amount is small, and the detection time is short.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a flowchart of a method for locating a color-abnormal lamp bead according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for locating a color-abnormal bead according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a connected component detection process for a display screen image according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the width and height of the minimum circumscribed rectangle of the connected domain of each bead according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a process of analyzing positions of color abnormal beads in a display screen image according to an embodiment of the present invention;
FIG. 6 is a flowchart of a method for locating a bead with an abnormal color in accordance with an embodiment of the present invention;
FIG. 7 is a flowchart of a method for locating a four-color abnormal lamp bead according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a positioning device for a color abnormal lamp bead according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the embodiment of the invention, the central points of the lamp beads are not positioned in a row-by-row or column-by-column mode based on the search step length, but the color extraction based on each monochromatic light of other two monochromatic lights is carried out on the display screen image only emitting each monochromatic light of RGB three monochromatic lights, and the lamp beads emitting each monochromatic light of other two monochromatic lights are highlighted in the corresponding extracted image through binarization processing, so that the positions of the color abnormal lamp beads in the display screen image can be determined, and the positions of the color abnormal lamp beads in the display screen are finally determined. Because the whole process only needs to position the abnormal lamp beads, the calculated amount is small, and the detection time is correspondingly short.
The method provided by the present invention will be described in detail with reference to specific examples.
Example one
Referring to fig. 1, fig. 1 is a flowchart of a method for positioning a color abnormal lamp bead according to an embodiment of the present invention, and as shown in fig. 1, the method mainly includes the following steps:
step 101, obtaining a display screen image of which the lamp bead only emits each of RGB three monochromatic lights after the display screen is electrified.
In the embodiment of the invention, the display screen can be an LED display screen, an LCD display screen, an OLED display screen and the like.
In practical application, each lamp bead in the display screen is composed of at least one light-emitting component capable of emitting different monochromatic light, only a light-emitting component emitting certain monochromatic light or all light-emitting components can emit light under the control of the display screen controller, for example, under the condition that each lamp bead in the display screen is composed of three light-emitting components only emitting red light, only emitting green light and only emitting blue light, when only the light-emitting component emitting red light emits light, the whole lamp bead only emits red light; when only the light-emitting component emitting green light emits light, the whole lamp bead only emits green light; when only the light-emitting component emitting blue light emits light, the whole lamp bead only emits blue light; when all three light-emitting components emitting only red light, only green light and only blue light emit light, the whole lamp bead emits mixed light of three monochromatic lights of red, green and blue (for example, emits white light).
In this step 101, a display screen image is obtained in which the lamp bead emits only each of three kinds of monochromatic light of RGB after the display screen is powered on, that is, a display screen image in which the lamp bead emits only red light, a display screen image in which the lamp bead emits only green light, and a display screen image in which the lamp bead emits only blue light are obtained.
102, aiming at a display screen image of which the lamp bead only emits each monochromatic light of three monochromatic lights of RGB, executing the following operation steps 1021 and 1023 to determine the position of the abnormal color lamp bead in the display screen image.
In the embodiment of the invention, the position of the lamp bead emitting one of the other two monochromatic lights in the display screen image is determined by analyzing the display screen image emitting each monochromatic light of the three monochromatic lights of RGB (namely step 1021 and 1023), and the lamp beads emitting other monochromatic lights are abnormal in color.
Step 1021, analyzing and determining the size of each lamp bead in the display screen image, and determining the reference size of the lamp bead in the display screen image according to the size of each lamp bead;
step 1022, performing color extraction based on each monochromatic light of the other two monochromatic lights on the display screen image to obtain an image corresponding to each monochromatic light of the other two monochromatic lights;
here, in an image obtained by extracting a color of the display screen image based on a certain monochromatic light, the difference between the gray value of the pixel point at the position of the bead emitting the monochromatic light and the gray value of the pixel point at the position of other beads is more obvious.
And 1023, performing binarization processing on the image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of the color abnormal lamp bead in the display screen image according to the analyzed communicated region and the reference size of the lamp bead in the display screen image.
After the image corresponding to each monochromatic light in other two monochromatic lights is subjected to binarization processing, the position of the lamp bead emitting the monochromatic light in the other two monochromatic lights can be highlighted, and therefore the position of the lamp bead with abnormal color can be determined by detecting the connected domain and utilizing the reference size of the lamp bead in the image of the display screen. For example, when a display screen image with beads emitting only green light is subjected to red light-based color extraction, if a red bead (a bead with abnormal color) exists in the display screen image, the position of the red bead is highlighted, so that the position of the red bead can be determined by subsequent connected domain detection and comparison of reference sizes of beads in the display screen image.
It can be seen that, in the embodiment of the present invention shown in fig. 1, a display screen image in which a lamp bead emits only each of three monochromatic lights of RGB after the display screen is powered on is respectively obtained, a color extraction based on each of the other two monochromatic lights is performed on the display screen image in which only each of the three monochromatic lights of RGB is emitted, so as to obtain an image corresponding to each of the other two monochromatic lights, binarization processing is performed on the image corresponding to each of the other two monochromatic lights, so that a color abnormal lamp bead in the image is highlighted, and then a position of the color abnormal lamp bead in the display screen image is determined according to a connected domain detection result and a reference size of the lamp bead in the display screen image. In the whole processing procedure, need not give the search step length and fix a position all lamp pearls through the mode row by row or row by row, consequently receive the influence of actual lamp pearl image size less, and only need through carrying out the colour extraction based on every monochromatic light in other two kinds of monochromatic lights to the display screen image, and cooperate binaryzation to handle and communicate the domain detection and can analyze and determine the unusual lamp pearl position of colour, need not fix a position all lamp pearl positions and carry out the position analysis of the unusual lamp pearl of colour again, consequently the calculated amount is less, detection speed is faster.
Example two
Referring to fig. 2, fig. 2 is a flowchart of a method for positioning a bead with abnormal color according to an embodiment of the present invention, and as shown in fig. 2, the method specifically includes the following steps:
step 201, obtaining a display screen image of which the lamp bead only emits each of the three kinds of monochromatic light of RGB after the display screen is electrified.
Through this step 201, a display screen image in which the lamp beads emit red light only, a display screen image in which the lamp beads emit green light only, and a display screen image in which the lamp beads emit blue light only can be obtained.
Step 202, aiming at the display screen image of which the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB, the following operation step 2021 and 2023d is executed to determine the position of the color abnormal lamp bead in the display screen image.
In the embodiment of the invention, the position of the lamp bead emitting one of the other two monochromatic lights in the display screen image is determined by analyzing the display screen image emitting each monochromatic light of the three monochromatic lights of RGB (namely step 2021 and step 2023d), and the lamp bead emitting one of the other two monochromatic lights is the abnormal-color lamp bead.
Step 2021, analyzing and determining the size of each lamp bead in the display screen image, and determining the reference size of each lamp bead in the display screen image according to the size of each lamp bead.
In the embodiment of the invention, the size of the lamp bead comprises height and width.
The analyzing and determining the height and the width of each lamp bead in the display screen image specifically comprises the following steps:
s11, detecting the connected domain of the display screen image to obtain the connected domain of each lamp bead in the display screen image;
s12, determining the minimum external rectangle of the connected domain of each lamp bead in the display screen image, and taking the height and the width of the minimum external rectangle as the height and the width of the lamp bead respectively.
Through the above steps S11 to S12, the connected domain of each bead and the minimum circumscribed rectangle of each connected domain in the display screen image can be determined by analysis, as shown in fig. 3 in particular, and the height and width of the minimum circumscribed rectangle of the connected domain of each bead are respectively taken as the height and width of the bead, so that the height and width of all beads in the display screen image shown in fig. 4 can be finally obtained.
In the embodiment of the invention, the reference size of the lamp bead in the display screen image comprises a reference height and a reference width.
The method for determining the reference height and the reference width of the lamp beads in the display screen image according to the height and the width of each lamp bead specifically may be: and calculating the average height and the average width of the lamp beads in the display screen image, and respectively determining the average height and the average width as the reference height and the reference width of the lamp beads in the display screen image.
For example, assuming that there are n lamp beads in the display screen image, the reference height Href of the lamp bead in the display screen image is (H1+ H2+ H3+ … + Hn)/n, and the reference width Wref is (W1+ W2+ W3+ … + Wn)/n, where Hi and Wi are the height and width of the ith lamp bead, respectively.
Step 2022, performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to the one of the other two monochromatic lights.
Here, in an image obtained by extracting a color of the display screen image based on a certain monochromatic light, the difference between the gray value of the pixel point at the position of the bead emitting the monochromatic light and the gray value of the pixel point at the position of other beads is more obvious.
Taking the display screen image as an example of a display screen image in which the lamp beads only emit green light, color extraction based on each of the remaining 2 kinds of monochromatic light may be performed on the display screen image, assuming that the first image on the left side in fig. 5 is a display screen image in which the lamp beads only emit green light after the display screen is powered on, two lamp beads in a white square frame in the display screen image emit red light (the two lamp beads emitting red light are color abnormal lamp beads), and the other lamp beads all emit green light, performing color extraction based on red light on the display screen image may obtain an image corresponding to red light (i.e., an image of an R channel), and performing color extraction based on blue light on the display screen image may obtain an image corresponding to blue light (i.e., an image of a B channel), as shown in particular in the image of the second column in fig. 5.
Step 2023a, performing binarization processing on the image corresponding to each of the other two monochromatic lights, and analyzing a connected region in the binarized image.
In the embodiment of the present invention, the specific method for performing binarization processing on the image corresponding to each of the other two monochromatic lights is as follows: and calculating the average gray value of each pixel point in the image, taking the average gray value as a binarization threshold value, and performing binarization processing on the image according to the binarization threshold value.
After the image corresponding to each of the other two monochromatic lights is binarized, the bead emitting the monochromatic light in the image corresponding to the monochromatic light of the other two monochromatic lights can be highlighted, as shown in the third column of images in fig. 5. For example, by performing binarization processing on an image corresponding to red light, the position of red light can be highlighted, as shown by the lower image in the third column of images in fig. 5, the positions of two beads of red light are highlighted; after the image corresponding to the blue light is binarized, the position of the bead emitting blue light can be highlighted, as shown in the upper image in the third column image in fig. 5, since there is no bead emitting blue light in the image, the position of the bead emitting blue light is highlighted.
Step 2023b, determining the minimum external rectangle of each analyzed connected region;
2023c, calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image respectively;
step 2023d, if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside the preset threshold range [1- Δ t, 1+ [ delta ] t, determining that the connected region is not the position of the lamp beads with abnormal color, otherwise, determining that the connected region is the position of the lamp beads with abnormal color.
In the embodiment of the present invention, Δ t is a preset value, and a value of Δ t is between 0 and 1, for example, 0.1. In this step 2023d, filtering the connected domain, which is different from the reference size of the bead in the display screen image, and only keeping the connected domain whose size is different from the reference size of the bead in the display screen image, where the result of filtering the connected domain is shown in the fourth column of images in fig. 5, and the connected domain does not exist after filtering the connected domain in the image of the channel B, so that it can be determined that the display screen image does not have a bead with a blue color that is abnormal; and 2 connected domains exist after the connected domains in the image of the R channel are filtered, so that 2 abnormal color lamp beads emitting red light can be determined to exist in the display screen image.
In consideration of the fact that lamp beads with the same specification are generally adopted in the same display screen, the size difference between the lamp beads is not large. Therefore, in the embodiment of the invention, the analyzed size of the connected region is compared with the reference size of the lamp beads in the display screen image, the connected region with smaller size difference is determined as the position of the abnormal-color lamp beads, and the connected region with larger size difference is filtered out, so that the accuracy of identifying the abnormal-color lamp beads is improved.
The above steps 2023a to 2023d are a specific way of the step 1023 in the embodiment of the present invention shown in fig. 1. The above steps 2023b to 2023d are a specific implementation manner of determining the position of the color abnormal bead in the display screen image according to the analyzed connected region and the reference size of the bead in the display screen image in the above step 1023.
It should be noted that, in the embodiment of the present invention shown in fig. 1, this embodiment, and the following embodiments shown in fig. 6 and fig. 7, the analysis of the connected domain and the determination of the minimum bounding rectangle for the display screen image where the lamp bead only emits a certain monochromatic light are performed by using the light emitting device emitting the monochromatic light as a unit, that is, the analyzed connected domain, the minimum bounding rectangle, and the like are substantially the connected domain and the minimum bounding rectangle corresponding to the light emitting device emitting the monochromatic light. Therefore, the finally determined position of the bead with the abnormal color should be the position of the light-emitting component emitting the monochromatic light of the color, but since the light-emitting component itself is a component of the bead, the determined position of the light-emitting component is regarded as the position of the bead containing the light-emitting component in the embodiment of the present invention.
It can be seen that, compared with the embodiment of the present invention shown in fig. 1, in the embodiment of the present invention shown in fig. 2, in addition to the advantages of the embodiment of the present invention shown in fig. 1, when the color extraction based on each monochromatic light of the other two monochromatic lights is performed on the display screen image, and the position of the bead with the abnormal color is determined by matching with the binarization processing and the connected domain detection, the size of each connected domain is compared with the reference size of the bead in the display screen image to implement the connected domain filtering, so that the accuracy of identifying the bead with the abnormal color can be effectively improved.
EXAMPLE III
Referring to fig. 6, fig. 6 is a flowchart of a method for positioning a bead with abnormal three colors according to an embodiment of the present invention, and as shown in fig. 6, the method specifically includes the following steps:
step 601, obtaining a display screen image of which the lamp bead only emits each of RGB three monochromatic lights after the display screen is electrified.
Step 602, aiming at the display screen image only emitting each of the three monochromatic lights of RGB, the following operation steps 6021-6023e are executed to determine the position of the color abnormal lamp bead in the display screen image.
And 6021, analyzing and determining the size of each lamp bead in the display screen image, and determining the reference size (including the reference height and the reference width) of each lamp bead in the display screen image according to the size of each lamp bead.
And 6022, extracting the color of the display screen image based on each of the other two kinds of monochromatic light to obtain an image corresponding to the monochromatic light of the other two kinds of monochromatic light.
And 6023a, performing binarization processing on the image corresponding to each of the other two monochromatic lights, and analyzing a connected region in the binarized image.
Step 6023b, determining the minimum circumscribed rectangle of each analyzed connected area;
step 6023c, calculating the ratio of the height and width of the minimum circumscribed rectangle of the connected region to the reference height and reference width of the lamp bead in the display screen image;
the above steps 601-6023c are the same as the steps 201-2023c in the embodiment of the invention shown in fig. 2, and are not described again.
And 6023d, if the ratio of the height of the minimum circumscribed rectangle of the connected region to the reference height of the lamp bead in the display screen image and the ratio of the width of the minimum circumscribed rectangle of the connected region to the reference width of the lamp bead in the display screen image are outside the preset threshold range [1- Δ t, 1+ [ delta ] t, determining that the connected region is not the position of the lamp bead with abnormal color, otherwise, further executing 6023 e.
In consideration of the fact that lamp beads with the same specification are generally adopted in the same display screen, the size difference between the lamp beads is not large. Therefore, in the embodiment of the present invention, the analyzed size of the connected region is compared with the reference size of the bead in the display screen image, the connected region with the larger size difference is filtered, and the connected region with the smaller size difference can be further determined, that is, step 6023e is performed.
And 6023e, judging whether the color of the connected region in the display screen image is consistent with the light-emitting color of the lamp bead in the display screen image, if so, determining that the connected region is not the position of the lamp bead with the abnormal color, and if not, determining that the connected region is the position of the lamp bead with the abnormal color.
In this step 6023e, after the connected domains that are not much different from the reference sizes of the lamp beads in the display screen image are determined, the colors of the corresponding positions of the connected domains in the display screen image are compared with the light emitting colors of the lamp beads in the display screen image, if the colors are consistent, the positions are not considered to be the positions of the lamp beads with abnormal colors, and if the colors are not consistent, the positions are considered to be the positions of the lamp beads with abnormal colors.
The above steps 6023a to 6023e may implement step 1023 in the embodiment of the present invention shown in fig. 1. In the above steps 2023b to 2023e, the operation step of determining the position of the color abnormal light bead in the display screen image according to the analyzed connected region, the reference height and the reference width in the above step 1023 can be realized.
It can be seen that, compared with the embodiment of the present invention shown in fig. 2, in addition to the advantages of the embodiment of the present invention shown in fig. 2, after each connected domain close to the reference size of the lamp bead in the display screen image is determined, the determined connected domain is further compared with the light emitting color of the lamp bead in the display screen image, and only the connected domain with inconsistent color comparison is determined as the position of the color abnormal lamp bead. Through the contrast of the color of each connected domain and the luminous color of the lamp beads in the display screen image, the accuracy rate of identifying the abnormal-color lamp beads can be further improved.
Example four
Referring to fig. 7, fig. 7 is a flowchart of a method for positioning a four-color abnormal lamp bead according to an embodiment of the present invention, and as shown in fig. 7, the method mainly includes the following steps:
and 701, obtaining a display screen image of which the lamp bead only emits each of RGB three monochromatic lights after the display screen is electrified.
Step 702, for the acquired display screen image emitting only each of the three RGB monochromatic lights, the following operation steps 7021 and 7023 are performed to determine the position of the color abnormal bead in the display screen image.
7021, analyzing and determining the size of each lamp bead in the display screen image, and determining the reference size of the lamp bead in the display screen image according to the size of each lamp bead;
7022, extracting the color of the display screen image based on each of the other two monochromatic lights to obtain an image corresponding to each of the other two monochromatic lights;
7023, performing binarization processing on the image corresponding to each of the other two monochromatic lights, analyzing a connected region in the binarized image, and determining the position of the color abnormal lamp bead in the display screen image according to the analyzed connected region and the reference size of the lamp bead in the display screen image.
The above steps 701-7023 are the same as the implementation principle of the steps 101-1023 in the embodiment of the invention shown in fig. 1, and are not described again.
Step 703, summarizing the number of the abnormal color lamp beads, if the ratio of the number of the abnormal color lamp beads to the total number of the lamp beads in the display screen exceeds a preset threshold value, determining that the quality inspection of the display screen is unqualified, otherwise, determining that the quality inspection of the display screen is qualified.
In the embodiment of the invention, after the step 7021-7023 is executed for the display screen image only emitting each monochromatic light of the three monochromatic lights of RGB, the position of the color abnormal lamp bead in the display screen image can be determined. After determining the position of the color abnormal lamp bead in the display screen image emitting only each of the three RGB monochromatic lights, the step 703 may be further performed to determine the quality inspection result of the display screen.
In the embodiment of the invention, when the display screen is determined to be unqualified in quality inspection, the positions of the color abnormal lamp beads in the display screen can be further output, so that a production line detector can manually review the unqualified display screen.
It can be seen that, in the embodiment of the present invention shown in fig. 7, compared with the embodiment of the present invention shown in fig. 1, after the position of the color abnormal bead in the display screen is determined, whether the display screen is qualified or not is further determined according to the proportion of the color abnormal bead, and for the unqualified display screen, the position of the color abnormal bead can be further output so as to facilitate subsequent manual review of the unqualified display screen.
The above detailed description of the positioning method of the color abnormal lamp bead in the embodiment of the present invention, and the embodiment of the present invention further provides a positioning device of the color abnormal lamp bead, which is described in detail below with reference to fig. 8.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a positioning device for a color abnormal lamp bead according to an embodiment of the present invention, as shown in fig. 8, the device includes:
the acquisition unit 801 is used for acquiring a display screen image of which the lamp bead only emits each of three kinds of monochromatic light of RGB after the display screen is electrified;
the processing unit 802 is configured to, for a display screen image in which a lamp bead emits only each of three kinds of monochromatic light, namely RGB after the display screen is powered on, perform the following operations:
performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
In the arrangement shown in figure 8 of the drawings,
the size of the lamp bead comprises height and width;
the processing unit 802 determines the height and width of each bead in the display screen image, and includes:
detecting a connected domain of the display screen image to obtain the connected domain of each lamp bead in the display screen image;
and determining the minimum external rectangle of the connected domain of each lamp bead in the display screen image, and taking the height and the width of the minimum external rectangle as the height and the width of the lamp bead respectively.
In the arrangement shown in figure 8 of the drawings,
the reference size of the lamp bead comprises a reference height and a reference width;
the processing unit 802 determines the reference size of the lamp bead in the display screen image according to the size of each lamp bead in the display screen image, and includes:
and calculating the average height and the average width of the lamp beads in the display screen image, and respectively determining the average height and the average width as the reference height and the reference width of the lamp beads in the display screen image.
In the arrangement shown in figure 8 of the drawings,
the processing unit 802, when performing binarization processing on an image corresponding to each of the other two monochromatic lights, is configured to:
and calculating the average gray value of each pixel point in the image, taking the average gray value as a binarization threshold value, and performing binarization processing on the image according to the binarization threshold value.
In the arrangement shown in figure 8 of the drawings,
the reference dimension of the lamp bead comprises: a reference height and a reference width;
the processing unit 802 determines the position of the bead with abnormal color in the display screen image according to the analyzed connected region and the reference size of the bead in the display screen image, and includes:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
and if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1 plus delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise, determining that the connected region is the position of the lamp beads with abnormal color.
In the arrangement shown in figure 8 of the drawings,
the reference dimension of the lamp bead comprises: a reference height and a reference width;
the processing unit 802 determines the position of the bead with abnormal color in the display screen image according to the analyzed connected region and the reference size of the bead in the display screen image, and includes:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1+ [ delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise,
and further judging whether the color of the connected region in the display screen image is consistent with the light-emitting color of the lamp beads in the display screen image, if so, determining that the connected region is not the position of the lamp beads with abnormal color, and if not, determining that the connected region is the position of the lamp beads with abnormal color.
In the arrangement shown in figure 8 of the drawings,
the device further comprises a quality inspection unit 803, which is used for summarizing the number of the color abnormal lamp beads after the processing unit 802 determines the position of the color abnormal lamp beads in the display screen image which only emits each of the three kinds of monochromatic light of RGB, if the ratio of the number of the color abnormal lamp beads to the total number of the lamp beads in the display screen exceeds a preset threshold value, the quality inspection of the display screen is determined to be unqualified, otherwise, the quality inspection of the display screen is determined to be qualified.
In the arrangement shown in figure 8 of the drawings,
the quality inspection unit 803, after determining that the display screen quality inspection is not qualified, is further configured to: and outputting the position of the lamp bead with the abnormal color in the display screen.
An embodiment of the present invention also provides a non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps in the method for positioning a color abnormal lamp bead as shown in fig. 1, 2, 6, and 7.
An embodiment of the present invention further provides an electronic device, as shown in fig. 9, where the electronic device 900 includes a non-transitory computer-readable storage medium 901, a processor 902, and a computer program stored on the non-transitory computer-readable storage medium 901 and executable on the processor 902, and the processor executes the program to implement the following steps:
obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified;
aiming at the display screen image that the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB after the display screen is electrified, the following operations are executed:
respectively performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (18)

1. A method for positioning a lamp bead with abnormal color is characterized by comprising the following steps:
obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified;
aiming at the display screen image that the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB after the display screen is electrified, the following operations are executed:
respectively performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
2. The method of claim 1,
the size of the lamp bead comprises height and width;
the height and the width of each lamp bead in the display screen image are determined by adopting the following method:
detecting a connected domain of the display screen image to obtain the connected domain of each lamp bead in the display screen image;
and determining the minimum external rectangle of the connected domain of each lamp bead in the display screen image, and taking the height and the width of the minimum external rectangle as the height and the width of the lamp bead respectively.
3. The method of claim 1,
the reference size of the lamp bead comprises a reference height and a reference width;
the method for determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image comprises the following steps:
and calculating the average height and the average width of the lamp beads in the display screen image, and respectively determining the average height and the average width as the reference height and the reference width of the lamp beads in the display screen image.
4. The method of claim 1,
the method for carrying out binarization processing on the image corresponding to each of the other two monochromatic lights comprises the following steps:
and calculating the average gray value of each pixel point in the image, taking the average gray value as a binarization threshold value, and performing binarization processing on the image according to the binarization threshold value.
5. The method of claim 1,
the reference dimension comprises a reference height and a reference width;
according to the analyzed connected region and the reference size of the lamp beads in the display screen image, determining the positions of the lamp beads with abnormal colors in the display screen image, and the method comprises the following steps:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
and if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1 plus delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise, determining that the connected region is the position of the lamp beads with abnormal color.
6. The method of claim 1,
the reference dimension comprises a reference height and a reference width;
according to the analyzed connected region and the reference size of the lamp beads in the display screen image, determining the positions of the lamp beads with abnormal colors in the display screen image, and the method comprises the following steps:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1+ [ delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise,
and further judging whether the color of the connected region in the display screen image is consistent with the light-emitting color of the lamp beads in the display screen image, if so, determining that the connected region is not the position of the lamp beads with abnormal color, and if not, determining that the connected region is the position of the lamp beads with abnormal color.
7. The method of claim 1,
the method further comprises the following steps: after the positions of the color abnormal lamp beads in each display screen image only emitting monochromatic light are determined, the number of the color abnormal lamp beads is collected, if the ratio of the number of the color abnormal lamp beads to the total number of the lamp beads in the display screen exceeds a preset threshold value, the quality inspection of the display screen is determined to be unqualified, and if not, the quality inspection of the display screen is determined to be qualified.
8. The method of claim 7,
after determining that the quality inspection of the display screen is not qualified, the method further comprises the following steps: and outputting the position of the lamp bead with the abnormal color in the display screen.
9. The utility model provides a positioner of unusual lamp pearl of colour which characterized in that, the device includes:
the acquisition unit is used for acquiring a display screen image of which the lamp bead only emits each of RGB three monochromatic lights after the display screen is electrified;
the processing unit is used for only emitting display screen images of each of RGB three monochromatic lights to the lamp beads after the display screen is electrified, and executing the following operations:
performing color extraction based on each monochromatic light of the other two monochromatic lights on the display screen image to obtain an image corresponding to each monochromatic light of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
10. The apparatus of claim 9,
the size of the lamp bead comprises height and width;
the processing unit determines the height and width of each lamp bead in the display screen image, and comprises:
detecting a connected domain of the display screen image to obtain the connected domain of each lamp bead in the display screen image;
and determining the minimum external rectangle of the connected domain of each lamp bead in the display screen image, and taking the height and the width of the minimum external rectangle as the height and the width of the lamp bead respectively.
11. The apparatus of claim 9,
the reference size of the lamp bead comprises a reference height and a reference width;
the processing unit determines the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image, and comprises the following steps:
and calculating the average height and the average width of the lamp beads in the display screen image, and respectively determining the average height and the average width as the reference height and the reference width of the lamp beads in the display screen image.
12. The apparatus of claim 9,
the processing unit, when carrying out binarization processing to the image corresponding to each of the other two monochromatic lights, is used for:
and calculating the average gray value of each pixel point in the image, taking the average gray value as a binarization threshold value, and performing binarization processing on the image according to the binarization threshold value.
13. The apparatus of claim 9,
the reference dimension of the lamp bead comprises: a reference height and a reference width;
the processing unit determines the position of the color abnormal lamp bead in the display screen image according to the analyzed connected region and the reference size of the lamp bead in the display screen image, and comprises the following steps:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
and if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1 plus delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise, determining that the connected region is the position of the lamp beads with abnormal color.
14. The apparatus of claim 9,
the reference dimension of the lamp bead comprises: a reference height and a reference width;
the processing unit determines the position of the color abnormal lamp bead in the display screen image according to the analyzed connected region and the reference size of the lamp bead in the display screen image, and comprises the following steps:
determining the minimum circumscribed rectangle of each analyzed connected region;
calculating the ratio of the height and the width of the minimum external rectangle of the connected region to the reference height and the reference width of the lamp bead in the display screen image;
if the ratio of the height of the minimum external rectangle of the connected region to the reference height of the lamp beads in the display screen image and the ratio of the width of the minimum external rectangle of the connected region to the reference width of the lamp beads in the display screen image are outside a preset threshold range [ 1-delta t, 1+ [ delta t ], determining that the connected region is not the position of the lamp beads with abnormal color, otherwise,
and further judging whether the color of the connected region in the display screen image is consistent with the light-emitting color of the lamp beads in the display screen image, if so, determining that the connected region is not the position of the lamp beads with abnormal color, and if not, determining that the connected region is the position of the lamp beads with abnormal color.
15. The apparatus of claim 9,
the device further comprises a quality inspection unit, wherein the quality inspection unit is used for summarizing the number of the color abnormal lamp beads after the processing unit determines the position of the color abnormal lamp beads in the display screen image which only emits each of the three RGB monochromatic lights, if the ratio of the number of the color abnormal lamp beads to the total number of the lamp beads in the display screen exceeds a preset threshold value, the quality inspection of the display screen is determined to be unqualified, and if not, the quality inspection of the display screen is determined to be qualified.
16. The apparatus of claim 15,
the quality inspection unit is further used for: and outputting the position of the lamp bead with the abnormal color in the display screen.
17. A non-transitory computer readable storage medium storing instructions, wherein the instructions, when executed by a processor, cause the processor to perform the steps in the method for locating a color-anomalous lamp bead of any one of claims 1 to 8.
18. An electronic device comprising a non-transitory computer readable storage medium, a processor, and a computer program stored on the non-transitory computer readable storage medium and executable on the processor, wherein the processor implements the following steps when executing the program:
obtaining a display screen image of each of RGB three monochromatic lights emitted by a lamp bead after the display screen is electrified;
aiming at the display screen image that the lamp bead only emits each monochromatic light of the three monochromatic lights of RGB after the display screen is electrified, the following operations are executed:
respectively performing color extraction based on each of the other two monochromatic lights on the display screen image to obtain an image corresponding to each of the other two monochromatic lights;
performing binarization processing on an image corresponding to each of the other two monochromatic lights, analyzing a communicated region in the binarized image, and determining the position of a bead with abnormal color in the display screen image according to the analyzed communicated region and the reference size of the bead in the display screen image; and determining the reference size of the lamp beads in the display screen image according to the size of each lamp bead in the display screen image.
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