CN107590802B - Television display consistency detection method, storage medium and detection equipment - Google Patents
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Abstract
The invention discloses a television display consistency detection method, a storage medium and detection equipment, wherein the method comprises the following steps: A. when the reference television displays the test image, acquiring and storing reference image data output by a reference television mainboard; controlling the tested television to display the test image and acquiring test image data output by a mainboard of the tested television; B. calculating the similarity between the test image data and the reference image data according to the test image data and the reference image data; C. and judging whether the similarity is greater than a preset value, and if so, judging that the display of the tested television is consistent with that of the reference television. The invention solves the problems of large judgment error and low test efficiency when the television display consistency in the television array is judged through human eye observation in the prior art.
Description
Technical Field
The invention relates to the field of television detection, in particular to a television display consistency detection method, a storage medium and detection equipment.
Background
For a television array in a television splicing wall or a broadcast demonstration hall, dozens or dozens of televisions are mostly used for forming array display, and the display characteristics of each television are required to be consistent as much as possible. In the traditional television production link, the color consistency of all televisions playing the same image is subjectively judged by human eye observation, and the method has the defects of large judgment error and low test efficiency.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a method, a storage medium, and a device for detecting display uniformity of a television, which are used to solve the problems of large determination error and low test efficiency when determining the display uniformity of the television in a television array through human eye observation in the prior art.
The technical scheme of the invention is as follows:
a television display consistency detection method comprises the following steps:
A. when the reference television displays the test image, acquiring and storing reference image data output by a reference television mainboard; controlling the tested television to display the test image and acquiring test image data output by a mainboard of the tested television;
B. calculating the similarity between the test image data and the reference image data according to the test image data and the reference image data;
C. and judging whether the similarity is greater than a preset value, and if so, judging that the display of the tested television is consistent with that of the reference television.
The television display consistency detection method comprises the following specific steps:
a1, displaying a test image through a reference television, acquiring reference image data output by a reference television mainboard, converting the reference image data into an RGB format, and storing the reference image data in the RGB format;
and A2, displaying the test image through the tested television, acquiring the test image data output by the mainboard of the tested television, and converting the test image data into test image data in an RGB format.
In the method for detecting the television display consistency, in the step B, the similarity is calculated by using any one of a point-by-point comparison method, a histogram matching method, a matrix decomposition method or an image similarity algorithm based on feature points.
The television display consistency detection method, wherein the step B specifically includes:
and respectively calculating the red similarity value r, the green similarity value g and the blue similarity value b of the test image data and the reference image data by a point-by-point comparison method and adopting a preset calculation method.
In the step C, when r, g and b are all greater than preset values, it is determined that the display of the tested television is consistent with that of the reference television.
The television display consistency detection method is characterized in that the preset value is 95%.
The television display consistency detection method, wherein the step C further comprises: and if not, adjusting the screen parameters of the corresponding primary colors of the tested television according to the similarity of the three primary colors of r, g and b and entering the step A2.
The television display consistency detection method, wherein the step C further comprises: and displaying the red similarity value r, the green similarity value g and the blue similarity value b.
A storage medium having stored thereon a plurality of instructions, wherein the instructions are adapted to be loaded by a processor and to perform the television display uniformity detection method as described above.
A detection apparatus, comprising:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions, said instructions being adapted to be loaded by a processor and to perform the television display uniformity detection method as described above.
Has the advantages that: the method comprises the steps of obtaining and storing reference image data output by a television main board when a reference television displays a test image, obtaining test image data output by the television main board when a tested television displays the same test image, and calculating the similarity between the reference image data and the test image data according to the reference image data and the test image data; when the similarity is larger than or equal to the preset value, the reference image data is similar to the test image data, the display consistency of the tested television and the reference television is judged, the artificial subjective judgment is avoided, the detection is quick, the result is accurate, and the problems that in the prior art, the judgment error is large and the test efficiency is low when the television display consistency in the television array is judged through human eye observation are solved.
Drawings
Fig. 1 is a flowchart illustrating a method for detecting display uniformity of a television according to a preferred embodiment of the present invention.
Fig. 2 is a block diagram of a preferred embodiment of the detection apparatus of the present invention.
Detailed Description
The invention provides a television display consistency detection method, a storage medium and a detection device, and the invention is further described in detail below in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A method for detecting display consistency of a television, as shown in fig. 1, includes the steps of:
s1, when the reference television displays the test image, acquiring and storing the reference image data output by the reference television mainboard; controlling the tested television to display the test image and acquiring test image data output by a mainboard of the tested television;
s2, calculating the similarity between the test image data and the reference image data according to the test image data and the reference image data;
and S3, judging whether the similarity is larger than a preset value, and if so, judging that the image display of the tested television is consistent with that of the reference television.
The method of the invention is that a television with satisfactory color is used as a reference television, then the reference television and the tested television display the same frame image (namely a test image), the reference image data output by a main board of the reference television when the reference television displays the test image and the test image data output by the main board of the tested television when the tested television displays the test image are obtained, the reference image data is used for displaying the test image on a display screen of the reference television, the test image data is used for displaying the test image on the display screen of the tested television, whether the display of the tested television and the display of the reference television are consistent can be judged by calculating the similarity between the test image data and the reference image data, namely, when the tested television and the reference television display the same frame test image, the similarity of image data signals output by the main board of the television is compared, it can be quickly judged whether the two displays are consistent.
Specifically, the step S1 specifically includes:
s11, displaying the test image through the reference television, acquiring reference image data output by a reference television mainboard, converting the reference image data into an RGB format, and storing the reference image data in the RGB format;
more specifically, when a test image is displayed on a reference television, if a first control instruction is received, storing the reference image data in the RGB format as a similarity comparison sample; the first control instruction may be issued by a first switch connected to the reference tv through a wire, or may be issued by a remote controller wirelessly connected to the reference tv, that is, when the user presses the first switch, the first control instruction is generated, and the RGB-format reference image data is stored, or when the user presses a corresponding key on the remote controller, the first control instruction is issued, and the RGB-format reference image data is stored.
And S12, displaying the test image through the tested television, acquiring the test image data output by the mainboard of the tested television, and converting the test image data into test image data in an RGB format.
When the television displays different images, the colors, the brightness degrees and the like presented by the different images are different, so that in order to improve the detection accuracy, when the consistency of the detected images of each television is detected, the test images need to be displayed, and the colors, the brightness degrees and the like when all the televisions display the same image are detected, so that the image consistency of all the televisions is judged.
And when the tested television receives a control instruction for displaying the test image, the test image is displayed on the screen, and simultaneously test image data sent by the main board of the tested television for displaying the test image is obtained. When the television displays the test image in high definition, the test image data is a video signal in an LVDS (Low-Voltage Differential Signaling) format; and when the television displays the test image in an ultra-clear mode, the test image data is a video signal in a VByOne format. The reference image data and the test image data are converted into RGB format, so that the red similarity, the green similarity and the blue similarity of the reference image data and the test image data are compared respectively through three primary colors, and the reference image data converted into the RGB format is stored, for example, the reference image data is stored in a FLASH memory, so that the display consistency detection of other follow-up tested televisions and the reference television through displaying the same frame of test image is facilitated.
Specifically, in step S2, the similarity may be calculated by any one of a point-by-point comparison method, a histogram matching method, a matrix decomposition method, or an image similarity calculation algorithm based on feature points.
Preferably, under the condition of the same resolution, the similarity between the test image data and the reference image data is calculated by adopting a point-by-point comparison method, and specifically, the red similarity value r, the green similarity value g and the blue similarity value b of the test image data and the reference image data are respectively calculated by a preset calculation method.
The specific process of the calculation method is as follows:
sequentially taking red data R1 of each pixel point in the test image data and red data R2, R1 and R2 of corresponding pixel points in the reference image data, subtracting the absolute value, and dividing the absolute value by R1+ R2 to obtain the single-point red similarity ratio R of the current test pixel point and the corresponding pixel point in the reference image data, and when R is less than a red threshold Rth (Rth is a number between 0 and 0.1), considering that the two images are similar at the pixel point, the smaller Rth is obtained, the more accurate the similarity is, and the N is the number of similar red pixelsRPerform an addition operation, i.e. NR=NR+1, otherwise, if they are not similar, then not adding one until the comparison of each pixel point in the test image data is completed to obtain NRI.e. the total number of similar red pixels in the test image, and then calculating NRDividing by the value r of the total pixel point number N (the high definition is 1920x1080 and the ultra-high definition is 3840x 2160) to obtain a red similarity value r;
sequentially subtracting the green data G1 of each pixel point in the test image data and the red data G2, G1 and G2 of the corresponding pixel point in the reference image data, and then taking the result of the subtractionThe comparison value is divided by G1+ G2 to obtain the single-point green similarity ratio G of the current test pixel point and the corresponding pixel point in the reference image data, when G is smaller than a red threshold Gth (Gth is a number between 0 and 0.1), the two images are considered to be similar at the pixel point, the smaller Gth is obtained, the more accurate the similarity is, and the number N of similar red pixels isGPerform an addition operation, i.e. NG=NG+1, otherwise, if they are not similar, then not adding one until the comparison of each pixel point in the test image data is completed to obtain NRI.e. the total number of similar red pixels in the test image, and calculating NGDividing the value g by the total pixel point number N to obtain a green similarity value g;
sequentially subtracting blue data B1 of each pixel point in the test image data and blue data B2, B1 and B2 of corresponding pixel points in the reference image data, then taking an absolute value, and dividing the absolute value by B1+ B2 to obtain a single-point blue similarity ratio B of the current test pixel point and the corresponding pixel point in the reference image data, and when B is smaller than a red threshold Bth (Bth is a number between 0 and 0.1), considering that the two images are similar at the pixel point, the smaller Bth is obtained, the more accurate the similarity is, and the N is the number of similar red pixelsBPerform an addition operation, i.e. NB=NB+1, otherwise, if they are not similar, then not adding one until the comparison of each pixel point in the test image data is completed to obtain NRI.e. the total number of similar red pixels in the test image, and calculating NBDividing the value b by the total pixel point number N to obtain a blue similarity value b.
According to the invention, through the calculation, the three-primary-color similarity of the image data output by the main boards of the tested television and the reference television, namely the red similarity value r, the green similarity value g and the blue similarity value b, is obtained when the tested television and the reference television display the same frame of test image.
In step S3, when r, g, and b are all greater than the preset values, it is determined that the image display of the measured tv set is consistent with that of the reference tv set, and when r, g, and b are not all greater than the preset values, that is, when the similarity value of at least one color of the three primary colors does not exceed the preset values, it indicates that the display of the current measured tv set is not consistent with that of the reference tv set, it can be considered that the display characteristics of the measured tv set do not reach the standard, the corresponding primary color screen parameters that do not exceed the preset values need to be adjusted according to r, g, and b, and step S2 is continued until r, g, and b are greater than the preset values, i.e., the effect that the display characteristics of the measured tv set are consistent with that of the reference tv set is achieved.
Preferably, in order to visually check the display consistency of the tested television and the reference television, when a second control instruction is received, displaying a red similarity value r, a green similarity value g and a blue similarity value b of the image display of the tested television and the reference television on corresponding display equipment, the second control instruction is sent by a second switch in wired connection with the tested television or sent by another key on the remote controller, so that the tester can adjust the screen parameters of the tested television according to the similarity test result until the display consistency of the tested television and the reference television is achieved, can detect the display consistency of the next television without artificial and subjective judgment, has accurate and quick result, therefore, the effect of accurately and quickly realizing the consistent display of the television array is achieved, and the display quality of the television array is improved.
Preferably, when a control instruction is received, the similarity of the three primary colors is output and displayed, and meanwhile, the similarity of the three primary colors is scored, and a corresponding relationship between the similarity and a score is preset, for example, when the similarity is fully divided into 10 points, when 80% < the similarity < 90%, the score corresponding to the similarity is 7 points, when the similarity is 90% < the similarity < 95%, the score corresponding to the similarity is 8 points, and when the similarity =95%, the score corresponding to the similarity is 9 points; when the similarity is greater than 95%, the score corresponding to the similarity is 10 full scores; and when a first control instruction is received, outputting and displaying the three-primary-color similarity and the corresponding score together.
Based on the method, the invention further provides a storage medium, on which a plurality of instructions are stored, wherein the instructions are suitable for being loaded by a processor and executing the television display consistency detection method.
Based on the above method, the present invention further provides a detection apparatus, as shown in fig. 2, wherein the detection apparatus includes:
a processor 100 adapted to implement instructions; and
the storage device 200 is adapted to store a plurality of instructions adapted to be loaded by the processor and to perform the television display uniformity detection method as described above.
The storage medium is a non-volatile memory such as a non-volatile FLASH memory to store the reference image data, and the data cannot be lost after power failure.
The processor can comprise an FPGA chip, and the FPGA chip specifically comprises a first format conversion module, a second format conversion module, a FLASH read-write controller and a similarity calculation module; the second format conversion module, the FLASH read-write controller and the similarity calculation module are all connected with the first format conversion module; the first format conversion module is used for converting the test image in LVDS format or VByOne format into reference image data in RGB format; the second format conversion module is used for converting the reference image data in the RGB format into the test image data in the LVDS format or the VByOne format to be displayed on the display screen of the television, so that the test equipment does not influence the display of the test image by the television while testing, namely, the test equipment provided by the invention is electrically connected between the main board of the television and the display screen of the television; the FLASH read-write controller is used for storing the reference image data into a memory, reading the reference image data from the memory and transmitting the reference image data to the similarity calculation module; the similarity calculation module is used for calculating the similarity between the test image data and the pre-stored reference image data according to the test image data and the pre-stored reference image data.
Further technical details and advantages with respect to the above-described mobile terminal and storage medium have been set forth in the above-described method and will not be described again here.
In summary, according to the detection method, the storage medium, and the detection device for television display consistency provided by the present invention, the similarity between the reference image data and the test image data is calculated by obtaining and storing the reference image data output by the television motherboard when the reference television displays the test image, and obtaining the test image data output by the television motherboard when the tested television displays the same test image; when the similarity is larger than or equal to the preset value, the reference image data is similar to the test image data, the display consistency of the tested television and the reference television is judged, the artificial subjective judgment is avoided, the detection is quick, the result is accurate, and the problems that in the prior art, the judgment error is large and the test efficiency is low when the television display consistency in the television array is judged through human eye observation are solved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A television display consistency detection method is characterized by comprising the following steps:
A. when the reference television displays the test image, acquiring and storing reference image data output by a reference television mainboard; controlling the tested television to display the test image and acquiring test image data output by a mainboard of the tested television;
B. calculating the similarity between the test image data and the reference image data according to the test image data and the reference image data, wherein the similarity comprises a red similarity value R, a green similarity value g and a blue similarity value b, the calculation method of the R comprises the steps of sequentially taking red data R1 of each pixel point in the test image data and red data R2 of corresponding pixel points in the reference image data, subtracting R1 from R2, then taking an absolute value, dividing the absolute value by R1+ R2 to obtain a single-point red similarity ratio R of the current test pixel point and the corresponding pixel point in the reference image data, and when R is smaller than a red threshold Rth, calculating the similar red pixel number NRPerform an addition operation, i.e. NR＝NR+1, otherwise, not adding one until the comparison of each pixel point in the test image data is completed to obtain NRThat is, similar red pixel points in the test image are countedCalculate NRDividing the red pixel point number by the value r of the total pixel point number N to obtain a red similarity value r; the calculation method of G comprises the steps of sequentially taking green data G1 of each pixel point in the test image data and green data G2, G1 and G2 of corresponding pixel points in the reference image data, subtracting the two values, then taking an absolute value, dividing the absolute value by G1 and G2 to obtain a single-point green similarity ratio G of the current test pixel point and the corresponding pixel point in the reference image data, and when G is smaller than a green threshold Gth, carrying out calculation on the similar number N of the green pixel pointsGPerform an addition operation, i.e. NG＝NG+1, otherwise, not adding one until the comparison of each pixel point in the test image data is completed to obtain NGNamely similar green similar pixel points in the test image, and then calculating NGDividing the value g by the total pixel point number N to obtain a green similarity value g; the calculation method of B is that the blue data B1 of each pixel point in the test image data and the blue data B2, B1 and B2 of the corresponding pixel point in the reference image data are sequentially subtracted, the absolute value is obtained, then the absolute value is divided by B1+ B2, the single-point blue similarity ratio B of the current test pixel point and the corresponding pixel point in the reference image data is obtained, and when B is smaller than a blue threshold value Bth, the number N of similar blue pixel is calculatedBPerform an addition operation, i.e. NB＝NB+1, otherwise, not adding one until the comparison of each pixel point in the test image data is completed to obtain NBI.e. similar blue similar pixel points in the test image, and then calculating NBDividing the value b by the total pixel point number N to obtain a blue similarity value b;
C. and judging whether the similarity is greater than a preset value, and if so, judging that the display of the tested television is consistent with that of the reference television.
2. The method for detecting the television display consistency according to claim 1, wherein the step a specifically comprises:
a1, displaying a test image through a reference television, acquiring reference image data output by a reference television mainboard, converting the reference image data into an RGB format, and storing the reference image data in the RGB format;
and A2, displaying the test image through the tested television, acquiring the test image data output by the mainboard of the tested television, and converting the test image data into test image data in an RGB format.
3. The method according to claim 2, wherein in step B, the similarity is calculated by any one of a point-by-point comparison method, a histogram matching method, a matrix decomposition method, or an image similarity calculation algorithm based on feature points.
4. The method for detecting the television display consistency according to claim 2, wherein the step B specifically comprises:
and respectively calculating the red similarity value r, the green similarity value g and the blue similarity value b of the test image data and the reference image data by a point-by-point comparison method and adopting a preset calculation method.
5. The method according to claim 4, wherein in step C, when r, g and b are all greater than preset values, it is determined that the display of the tested TV set is consistent with that of the reference TV set.
6. The method according to claim 4, wherein the predetermined value is 95%.
7. The method according to claim 4, wherein the step C further comprises: and if not, adjusting the screen parameters of the corresponding primary colors of the tested television according to the similarity of the three primary colors of r, g and b and entering the step A2.
8. The method according to claim 7, wherein the step C further comprises: and displaying the red similarity value r, the green similarity value g and the blue similarity value b.
9. A storage medium having stored thereon a plurality of instructions, wherein the instructions are adapted to be loaded by a processor and to perform the method for detecting tv display uniformity according to any one of claims 1-8.
10. A detection apparatus, comprising:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions, said instructions being adapted to be loaded by a processor and to perform the television display uniformity detection method according to any of claims 1 to 8.
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