CN106412575B - method and device for detecting display - Google Patents
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- CN106412575B CN106412575B CN201610821285.4A CN201610821285A CN106412575B CN 106412575 B CN106412575 B CN 106412575B CN 201610821285 A CN201610821285 A CN 201610821285A CN 106412575 B CN106412575 B CN 106412575B
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- 238000000034 method Methods 0.000 title claims abstract description 60
- 230000007547 defect Effects 0.000 claims abstract description 87
- 238000001514 detection method Methods 0.000 claims description 59
- 239000006185 dispersion Substances 0.000 claims description 26
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 21
- 239000003086 colorant Substances 0.000 claims description 10
- 101100117236 Drosophila melanogaster speck gene Proteins 0.000 claims description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
the invention discloses a method for detecting a display, which is characterized by comprising the steps of controlling an image signal generator to generate a chessboard image, controlling the image signal generator to send the chessboard image to a display to be detected so that the display displays the received chessboard image, controlling a camera to shoot the chessboard image displayed on the display and obtain the chessboard image shot by the camera, judging whether the number of corner points of the obtained chessboard image is H, H is (N +1) × (M +1), judging that the display has no obvious display defects if the corner points are H, and judging that the display has obvious display defects if the corner points are not H.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of method and devices of detection display.
Background technology
Usually, television set producing line has a test station to be whether the display for testing TV has after group installs television set
Abnormal, detection content includes picture brightness, color saturation etc., also includes that display screen picture is abnormal with the presence or absence of display, such as bright
Point, dim spot, bright line, concealed wire, crackle, negative and positive screen, local offset etc. are abnormal.The way of most of television factories is at present：When
Assembly line comes on TV machine circulation to after this test station, worker with connect in advance picture signal generator HDMI wire (or
Person's VGA line) other end be connected to television set, then corresponding channel is switched to remote controler, as the channels HDMI or VGA are logical
Road, television set display image signals generator input image, worker then detect by an unaided eye television set display picture
Whether brightness, color saturation etc. normal, and judge display whether have bright spot, dim spot, bright line, concealed wire, crackle, negative and positive screen,
Local offset etc. is abnormal, and then worker is again marked with the presence or absence of abnormal and specific abnormal conditions the television set.
The scheme of above-mentioned detection has the following defects：By using artificial judgement television set display picture brightness whether
Normally and whether screen has the mode of the exception such as bright spot, dim spot, bright line, concealed wire, crackle, negative and positive screen, local offset to be easy out
It now judges by accident, and for needing for the application scenarios that a large amount of display is detected, the detection efficiency of said program is low
Under.
Invention content
The embodiment of the present invention proposes a kind of method and device of detection display, is detected using automation standard, essence
Exactness is high, can accurately detect that display whether there is display defect.
In a first aspect, the embodiment of the present invention proposes a kind of method of detection display, including：
It controls picture signal generator and generates checkerboard image, and control described image signal generator by the checkerboard image
It is sent to display to be detected, so that the display shows the checkerboard image received；Wherein, the chess
Disk image includes N × M grid, and the checkerboard image includes at least two different grid colors, and in the horizontal or vertical
On the color of arbitrary neighborhood grid be different；
Control camera shoots the checkerboard image shown on the display, and obtains the chessboard figure that the camera takes
Picture；
Judge whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M+1)；
If so, judging that obvious display defect is not present in the display；
If it is not, judging the display, there are obvious display defects.
With reference to first aspect, it in the first possible realization method of first aspect, is received in the display
In checkerboard image, the color phase of the identical all grids of distance of the central point of the checkerboard image received apart from the display
Together, then the method for the detection display further includes：
It, will be apart from accessed checkerboard image when judging that obvious display defect is not present in the display
The identical grid of distance of central point calculates the dispersion degree of the color of each group of grid as same group of grid；
Judge whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；
If so, judging the display, there are negative and positive screen defects；
If it is not, then judging that negative and positive screen defect is not present in the display.
With reference to first aspect, in second of possible realization method of first aspect, the method for the detection display
Further include：
When judging that obvious display defect is not present in the display, in accessed checkerboard image
Each grid, calculates the ratio shared by the corresponding frequency range of each color in the grid, and by each color in the grid
Ratio shared by corresponding frequency range is ranked up from big to small；
Judge to be more than ratio with the presence or absence of the ratio shared by the frequency range for having sequence second in the grid of the checkerboard image
Threshold value；
If so, judging the display, there are the defects of bright concealed wire or crackle；
If it is not, then judging the display, there is no the defects of bright concealed wire or crackle.
With reference to first aspect, in the third possible realization method of first aspect, the method for the detection display
Further include：
The display brightness value of each grid is obtained from accessed checkerboard image；
For each grid, calculate both the display brightness value of the grid and normal brightness value corresponding with the grid it
Between luminance difference；
The quadratic sum for calculating the luminance difference of all grids obtains the luminance deviation degree of the checkerboard image；
Judge whether the luminance deviation degree is more than luminance deviation threshold value；
If so, judge that the brightness of the display is partially dark or partially bright, or the judgement display exist local speck or
Blackening；
If it is not, then judging that the brightness of the display is normal.
With reference to first aspect, in the 4th kind of possible realization method of first aspect, the method for the detection display
Further include：
Judging the display, there are every in when obvious display defect, calculating accessed checkerboard image
The coordinate of one angle point；
According to the coordinate of each angle point, from the angle for selecting the grid being not belonging in the checkerboard image in the angle point
The angle point of coordinate；
Using the angle point of selection fall as in the display, there are obvious display defects in grid region
Region.
Correspond in a first aspect, the embodiment of the present invention second aspect propose it is a kind of detection display device, including：
Display module is controlled, generates checkerboard image for controlling picture signal generator, and control described image signal hair
The checkerboard image is sent to display to be detected by raw device so that the display by the checkerboard image received into
Row display；Wherein, the checkerboard image includes N × M grid, and the checkerboard image includes at least two different grid colors,
And the color of the arbitrary neighborhood grid in the horizontal or on vertical is different；
Taking module is controlled, shoots the checkerboard image shown on the display for controlling camera, and described in acquisition
The checkerboard image that camera takes；
Angle point judgment module, for judging whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M
+1)；
First determination module, for when the angle point quantity of accessed checkerboard image be for H when, judge the display
There is no obvious display defects；
Second determination module, for when the angle point quantity of accessed checkerboard image is not H, judging the display
There are obvious display defects.
It is received in the display in the first possible realization method of second aspect in conjunction with second aspect
In checkerboard image, the color phase of the identical all grids of distance of the central point of the checkerboard image received apart from the display
Together, then the device of the detection display further includes：
Dispersion degree computing module will be away from for when judging that obvious display defect is not present in the display
Identical grid is as same group of grid with a distance from central point from accessed checkerboard image, and calculates each group of grid
The dispersion degree of color；
Dispersion degree judgment module, for judging whether that the dispersion degree of the color of one group of grid is more than discrete threshold
Value；
Third determination module, for when being more than discrete threshold values there are the dispersion degree of the color of one group of grid, judging
There are negative and positive screen defects for the display；
4th determination module, for when being more than discrete threshold values there is no the dispersion degree for the color for having one group of grid, sentencing
Negative and positive screen defect is not present in the fixed display.
In conjunction with second aspect, in second of possible realization method of second aspect, the device of the detection display
Further include：
Color-ratio computing module is used for when judging that obvious display defect is not present in the display, for
Each grid in accessed checkerboard image calculates the ratio shared by the corresponding frequency range of each color in the grid,
And the ratio shared by the corresponding frequency range of each color in the grid is ranked up from big to small；
Color-ratio judgment module, for judging in the grid of the checkerboard image with the presence or absence of the frequency for having sequence second
The ratio of Duan Suozhan is more than proportion threshold value；
5th determination module, for when there are the ratios shared by the frequency range of sequence second in the grid of the checkerboard image
When more than proportion threshold value, judging the display, there are the defects of bright concealed wire or crackle；
6th determination module, for when there is no the ratios shared by the frequency range for having sequence second in the grid of the checkerboard image
When example is more than proportion threshold value, judging the display, there is no the defects of bright concealed wire or crackle.
In conjunction with second aspect, in the third possible realization method of second aspect, the device of the detection display
Further include：
Display brightness acquisition module, the display brightness for obtaining each grid from accessed checkerboard image
Value；
Luminance difference computing module, display brightness value for for each grid, calculating the grid and with the grid
The luminance difference of corresponding normal brightness value between the two；
Luminance deviation computing module, the quadratic sum of the luminance difference for calculating all grids, obtains the checkerboard image
Luminance deviation degree；
Luminance deviation judgment module, for judging whether the luminance deviation degree is more than luminance deviation threshold value；
7th determination module, for when the luminance deviation degree is more than luminance deviation threshold value, judging the display
Brightness it is partially dark or partially bright, or there is local speck or blackening in the judgement display；
8th determination module, for when the luminance deviation degree is not more than luminance deviation threshold value, judging the display
The brightness of device is normal.
In conjunction with second aspect, in the 4th kind of possible realization method of second aspect, the device of the detection display
Further include：
Angular coordinate computing module, for, there are when obvious display defect, calculating institute in the judgement display
The coordinate of each angle point in the checkerboard image got；
Angle point chooses module, for the coordinate according to each angle point, is selected from the angle point and is not belonging to the chess
The angle point of the angular coordinate of grid in disk image；
Defect area determining module, for using the angle point of selection fall grid region deposited as in the display
In the region of obvious display defect.
Implement the embodiment of the present invention, has the advantages that：
The method of detection display provided in an embodiment of the present invention generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the display shows the checkerboard image received, and use phase
Machine shoots the image that display is shown；Since the checkerboard image includes N × M grid, the checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical be it is different, can be accurate
Determine position and the quantity of grid angle point, so can by the angle point quantity of the checkerboard image for judging to get from camera whether
Judge that the display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, this method can
It is directly executed by processor, the process for detecting display has unified examination criteria, and objectivity is strong, suitable for largely showing
Show the application scenarios that device is detected.And the device of detection display provided in an embodiment of the present invention has with the above method
Identical technical characteristic, thus the present apparatus reaches consistent with the technique effect of the above method.
Description of the drawings
Fig. 1 is the structural schematic diagram of one embodiment of the system of detection display provided by the invention；
Fig. 2 is the flow diagram of one embodiment of the method for detection display provided by the invention；
Fig. 3 is the implementation that detection display whether there is negative and positive screen in the method provided by the invention for detecting display
The flow diagram of example；
Fig. 4 is the image signal of one embodiment of the checkerboard image in the method for detection display provided by the invention
Figure；
Fig. 5 be detection display provided by the invention method in detection display lacking with the presence or absence of bright concealed wire or crackle
The flow diagram of sunken one embodiment；
Fig. 6 is the flow of one embodiment of the brightness of detection display in the method provided by the invention for detecting display
Schematic diagram；
Fig. 7 is the structural schematic diagram of one embodiment of the device of detection display provided by the invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Since the method for detection display provided by the invention needs display to carry out luminescence display, then when shooting
When the image that display is shown, external light source can influence the image captured by camera, therefore the process of detection display exists below
It is detected in dark place, processor 01, picture signal generator 02 and camera 04 is placed in dark place, as shown in Figure 1, Fig. 1 is this
The structural schematic diagram of one embodiment of the system for the detection display that invention provides, processor 01 and picture signal generator 02
Connection, the image signal line (HDMI wire or VGA line) of picture signal generator 02 are connected to the port (HDMI of tested display 03
Port or VGA port)；Then after processor 01 receives detection request signal, following detection will be executed：
It is the flow diagram of one embodiment of the method for detection display provided by the invention, this method referring to Fig. 2
It is executed by processor 01, including step S1 to S3, specially：
S1, processor 01 controls picture signal generator 02 and generates checkerboard image, and controls described image signal generator
02 is sent to the checkerboard image display 03 to be detected, so that the checkerboard image that the display 03 will receive
It is shown；Wherein, the checkerboard image includes N × M grid, and the checkerboard image includes at least two different grid face
Color, and the color of the arbitrary neighborhood grid in the horizontal or on vertical is different；
S2, processor 01 controls camera 04 and shoots the checkerboard image shown on the display 03, and obtains the phase
The checkerboard image that machine 04 takes；
S3, processor 01 judge whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M+1)；If
It is to judge that obvious display defect is not present in the display 03；If it is not, it is apparent to judge that the display 03 exists
Display defect.
It should be noted that display shows that checkerboard image will can entirely show that picture one divides for multiple regions, chessboard
Image is due to including at least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical is not
Identical, then the angle point on checkerboard image can be calculated by existing angle point algorithm, and on the other hand due to chessboard figure
Seem it is prefabricated by picture signal generator 02 in advance, then display 03 do not have display defect under the premise of, it is shown
The angle point quantity of checkerboard image be to determine, if it is detected that the angle point quantity come is different from the angle point quantity of former checkerboard image,
Illustrate that display 03 has the display defect of obviously opposite large area, and handles can control alarm module at this time, such as
Alarm lamp 05 is alarmed.
In addition, the detection process of above-mentioned steps S1 to S3 can accurately detect display 03 with the presence or absence of apparent
Defect, and be that can not detected by the method that above-mentioned angle point judges for excessively tiny defect, it is also necessary to after progress
Continuous part is accurate to be checked, can check non-obvious defect, such as small bright line, concealed wire, small crackle, small bright
The defects of spot, blackening.Thus when judgement display 03 there is no obvious display defect it is likely that there are non-aobvious and
When the display defect seen, the case where following detection display 03 is with the presence or absence of negative and positive screen can be executed：
Due to display 03 be usually LED LCD CRT construction, thus display 03 display when using backlight photograph
Bright mode, thus judge display 03 whether negative and positive screen the problem of, need to carry out on the basis of the central point of display or axis
The color distortion of symmetrical comparison grid.So when display 03 is shown, received based on above-mentioned control display 03
The checkerboard image by picture to be shown for above-mentioned requirements arrived, it is also necessary in the checkerboard image that the display 03 receives
In, show that the color of the identical all grids of the distance of the central point of the checkerboard image received is identical described in command range
, then specific detection process can be found in Fig. 3, and Fig. 3 is that detection display is in the method provided by the invention for detecting display
No there are the flow diagrams of one embodiment of negative and positive screen, including step S4 and S5, specially：
S4, processor 01 (judge described aobvious when judging that obvious display defect is not present in the display 03
Show that device 03 there may be display defect that is non-aobvious and seeing), by the distance phase of the central point apart from accessed checkerboard image
Same grid calculates the dispersion degree of the color of each group of grid as same group of grid；
It should be noted that as shown in figure 4, Fig. 4 is the checkerboard image in the method provided by the invention for detecting display
One embodiment image schematic diagram, the checkerboard image in Fig. 4 includes 5 × 5 grids, using lateral coding mode as chessboard figure
As being numbered, and by above-mentioned, " the identical grid of distance of the central point apart from accessed checkerboard image is as same group
The requirement of grid " is grouped, then the grid of number 1,5,21 and 25 is same group of grid, number 2,4,6,10,16,20,22
Grid with 25 is same group of grid, so can analogize classifying.
Below by by taking one group of grid of number 1,5,21 and 25 as an example, description calculates the discrete journey of the color of this group of grid
Degree, can be described in a manner of variance or standard deviation：If the color of number 1,5,21 and 25 grids be divided into R1.G1.B1,
R5.G5.B5, R21.G21.B21 and R25.G25.B25, the then color of this group of grid of the dispersion degree of the color of this group of grid
Variance D (1,5,21,25) or standard deviation
S5, processor 01 judge whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；If so,
Processor 01 judges the display 03, and there are negative and positive screen defects；If it is not, then processor 01 judges that the display 03 is not present
Negative and positive screen defect.
The color of same group of grid in the checkerboard image that will be shown received due to the display 03 is
It is identical, then for after display 03 shows image and using same group of chess in the checkerboard image of the shooting acquisition of camera 04
Lattice, it is only necessary to the difference of more mutual color performance, you can judge the phenomenon that display 03 whether there is negative and positive screen.Because
If the dispersion degree value of the color of the same group of grid in the image that shooting obtains is excessive, illustrate that there are colors for this group of grid
The excessive grid of difference, since display 03 shows that this this grid is shown based on same color, then the difference mistake shown
Greatly, then the phenomenon that proving display 03 there are negative and positive screens.
On the other hand, it when judging that obvious defect is not present in display 03, can also continue to execute following inspection
It surveys display 03 and whether there is bright concealed wire or the defect compared with crackle, as shown in figure 5, Fig. 5 is detection display provided by the invention
Display 03 is detected in the method for device 03 with the presence or absence of the flow diagram of one embodiment of the defect of bright concealed wire or crackle, tool
Body is：
S6, processor 01 (judge described aobvious when judging that obvious display defect is not present in the display 03
Show that device 03 there may be display defect that is non-aobvious and seeing), for each grid in accessed checkerboard image, calculate
Ratio in the grid shared by the corresponding frequency range of each color, and will be shared by the corresponding frequency range of each color in the grid
Ratio is ranked up from big to small；
S7, processor 01 judge in the grid of the checkerboard image with the presence or absence of the ratio shared by the frequency range for having sequence second
Example is more than proportion threshold value；If so, processor 01 judges the display 03, there are the defects of bright concealed wire or crackle；If it is not, then
Processor 01 judges the display 03, and there is no the defects of bright concealed wire or crackle.
It should be noted that when getting checkerboard image, color histogram point can be made to each grid in the image
Analysis, in color histogram, such as the grid should be the color lump of black, but the bright line of green is generated in the color lump of black,
Then the green frequency range in the color histogram has protrusion, then can determine that the grid, there are the defects of bright concealed wire or crackle.It is false
If the picture of whole display 03 uniformly shows the image of same color, rather than above-mentioned grid, then detect in this picture
Ratio shared by each shown color corresponding frequency band, it is more likely that the ratio shared by second frequency range of sorting is simultaneously little
(protrusion unobvious), it is more likely that be judged as normal phenomenon, but due to the protrusion be limited to it is a certain in this checkerboard image
In a grid, e.g. 5 × 5 checkerboard image, for same ratio threshold value, accuracy improves 25 times, therefore of the invention
The defect accuracy that embodiment is detected bright concealed wire or crackle using checkerboard image is high.
While detecting display 03 with the presence or absence of obvious defect, the brightness (packet of display 03 also can detect
Include whole or part brightness) it displays whether normally, as shown in fig. 6, Fig. 6 is in the method provided by the invention for detecting display
The flow diagram of one embodiment of the brightness of display, including step S8 to S11 are detected, specially：
S8, processor 01 obtain the display brightness value of each grid from accessed checkerboard image；
S9, processor 01 calculate the display brightness value of the grid and standard corresponding with the grid for each grid
The luminance difference of brightness value between the two；
S10, processor 01 calculate the quadratic sum of the luminance difference of all grids, obtain the luminance deviation of the checkerboard image
Degree；
S11, processor 01 judge whether the luminance deviation degree is more than luminance deviation threshold value；If so, described in judgement
The brightness of display 03 is partially dark or partially bright, or the judgement display has local speck or blackening；If it is not, then judging described aobvious
Show that the brightness of device 03 is normal.
It should be noted that before being detected to aforementioned display device 03, a normal display of display is taken to carry out
Sample collection controls the normal displays and shows above-mentioned checkerboard image, and control the checkerboard image of the shooting display of camera 04, from
Normal brightness value of the display brightness value as the grid of each grid is obtained in 04 collected checkerboard image of camera.For one
The display brightness value of a grid is determined as：The color of the grid be color range shared respectively in red-green-blue (0~
255) quantity, after the color ranges of three primary colours is added and divided by the 3 color range values that are obtained be display brightness value.
Going out display 03 there are when obvious display defect by above-mentioned Corner Detection, can also further determine that
The specific region of the display defect, determining method are specific as follows：
There are when obvious display defect, calculate accessed chessboard judging the display 03 for processor 01
The coordinate of each angle point in image；
Processor 01 is not belonging to from being selected in the angle point in the checkerboard image according to the coordinate of each angle point
The angle point of the angular coordinate of grid；
Processor 01 using the angle point of selection fall grid region it is apparent as existing in the display 03
Display defect region.
In addition, processor 01 will differentiate that result includes being placed on outside dark place at one after obtaining any of the above-described differentiation result
As a result in display, and, when detecting that exception, processor 01 can also control the alarm module being placed on outside dark place, such as
Alarm lamp 05 carries out alert process.
The method of detection display provided in an embodiment of the present invention generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the display shows the checkerboard image received, and use phase
Machine shoots the image that display is shown；Since the checkerboard image includes N × M grid, the checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical be it is different, can be accurate
Determine position and the quantity of grid angle point, so can by the angle point quantity of the checkerboard image for judging to get from camera whether
Judge that the display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, this method can
It is directly executed by processor, the process for detecting display has unified examination criteria, and objectivity is strong, suitable for largely showing
Show the application scenarios that device is detected.
It is the structural schematic diagram of one embodiment of the device of detection display provided by the invention, the device referring to Fig. 7
For floppy disk system, it is arranged in above-mentioned processor, whole flows of the method for the detection display of above-mentioned offer, the device can be provided
It specifically includes：
Display module 11 is controlled, generates checkerboard image for controlling picture signal generator, and control described image signal
The checkerboard image is sent to display to be detected by generator, so that the checkerboard image that the display will receive
It is shown；Wherein, the checkerboard image includes N × M grid, and the checkerboard image includes at least two different grid face
Color, and the color of the arbitrary neighborhood grid in the horizontal or on vertical is different；
Taking module 12 is controlled, shoots the checkerboard image shown on the display for controlling camera, and obtain institute
State the checkerboard image that camera takes；
Angle point judgment module 13, for judging whether the angle point quantity of accessed checkerboard image is H, H=(N+1) ×
(M+1)；
First determination module 14, for when the angle point quantity of accessed checkerboard image be for H when, judge the display
Obvious display defect is not present in device；
Second determination module 15, for when the angle point quantity of accessed checkerboard image is not H, judging the display
There are obvious display defects for device.
It is received in the display in the first possible realization method of second aspect in conjunction with second aspect
In checkerboard image, the color phase of the identical all grids of distance of the central point of the checkerboard image received apart from the display
Together, then the device of the detection display further includes：
Dispersion degree computing module 16 is used for when judging that obvious display defect is not present in the display, will
The identical grid of distance of central point apart from accessed checkerboard image calculates each group of grid as same group of grid
Color dispersion degree；
Dispersion degree judgment module 17, for judging whether that it is discrete that the dispersion degree of the color of one group of grid is more than
Threshold value；
Third determination module 18, for when being more than discrete threshold values there are the dispersion degree of the color of one group of grid, sentencing
There are negative and positive screen defects for the fixed display；
4th determination module 19, for when there is no the dispersion degree for the color for having one group of grid be more than discrete threshold values when,
Judge that negative and positive screen defect is not present in the display.
In conjunction with second aspect, in second of possible realization method of second aspect, the device of the detection display
Further include：
Color-ratio computing module 20 is used for when judging that obvious display defect is not present in the display, right
Each grid in accessed checkerboard image calculates the ratio shared by the corresponding frequency range of each color in the grid
Example, and the ratio shared by the corresponding frequency range of each color in the grid is ranked up from big to small；
Color-ratio judgment module 21 has sequence second for judging to whether there is in the grid of the checkerboard image
Ratio shared by frequency range is more than proportion threshold value；
5th determination module 22, for when there are the ratios shared by the frequency range of sequence second in the grid of the checkerboard image
When example is more than proportion threshold value, judging the display, there are the defects of bright concealed wire or crackle；
6th determination module 23, for when there is no shared by the frequency range for having sequence second in the grid of the checkerboard image
When ratio is more than proportion threshold value, judging the display, there is no the defects of bright concealed wire or crackle.
In conjunction with second aspect, in the third possible realization method of second aspect, the device of the detection display
Further include：
Display brightness acquisition module 24, the display brightness for obtaining each grid from accessed checkerboard image
Value；
Luminance difference computing module 25, display brightness value for for each grid, calculating the grid and with the chess
The luminance difference of the corresponding normal brightness value of lattice between the two；
Luminance deviation computing module 26, the quadratic sum of the luminance difference for calculating all grids obtain the chessboard figure
The luminance deviation degree of picture；
Luminance deviation judgment module 27, for judging whether the luminance deviation degree is more than luminance deviation threshold value；
7th determination module 28, for when the luminance deviation degree is more than luminance deviation threshold value, judging the display
The brightness of device is partially dark or partially bright, or the judgement display has local speck or blackening；
8th determination module 29, it is described aobvious for when the luminance deviation degree is not more than luminance deviation threshold value, judging
Show that the brightness of device is normal.
In conjunction with second aspect, in the 4th kind of possible realization method of second aspect, the device of the detection display
Further include：
Angular coordinate computing module 30, for, there are when obvious display defect, being calculated in the judgement display
The coordinate of each angle point in accessed checkerboard image；
Angle point chooses module 31, for the coordinate according to each angle point, is selected from the angle point described in being not belonging to
The angle point of the angular coordinate of grid in checkerboard image；
Defect area determining module 32, for using the angle point of selection fall grid region as in the display
There are the regions of obvious display defect.
The device of detection display provided in an embodiment of the present invention generates checkerboard image by controlling picture signal generator
And it is sent to display to be detected, so that the display shows the checkerboard image received, and use phase
Machine shoots the image that display is shown；Since the checkerboard image includes N × M grid, the checkerboard image includes
At least two different grid colors, and the color of the arbitrary neighborhood grid in the horizontal or on vertical be it is different, can be accurate
Determine position and the quantity of grid angle point, so can by the angle point quantity of the checkerboard image for judging to get from camera whether
Judge that the display whether there is obvious display defect for grid angle quantity, accuracy is high.In addition, in the present apparatus
It is placed in processor, there is unified examination criteria to the process of display detection, objectivity is strong, is suitable for a large amount of display
The application scenarios being detected.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer read/write memory medium
In, the program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. a kind of method of detection display, which is characterized in that including：
It controls picture signal generator and generates checkerboard image, and control described image signal generator and send the checkerboard image
To display to be detected, so that the display shows the checkerboard image received；Wherein, the chessboard figure
As including N × M grid, the checkerboard image includes at least two different grid colors, and in the horizontal or on vertical
The color of arbitrary neighborhood grid is different；
Control camera shoots the checkerboard image shown on the display, and obtains the checkerboard image that the camera takes；
Judge whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M+1)；
If so, judging that obvious display defect is not present in the display；
If it is not, judging the display there are obvious display defect, calculate each in accessed checkerboard image
The coordinate of a angle point；According to the coordinate of each angle point, from selecting the chess being not belonging in the checkerboard image in the angle point
The angle point of the angular coordinate of lattice；Using the angle point of selection fall grid region it is obvious as existing in the display
The region of display defect.
2. the method for detection display as described in claim 1, which is characterized in that in the chessboard figure that the display receives
As in, the color of the identical all grids of distance of the central point of the checkerboard image received apart from the display is identical, then
It is described detection display method further include：
It, will be apart from the center of accessed checkerboard image when judging that obvious display defect is not present in the display
The identical grid of distance of point calculates the dispersion degree of the color of each group of grid as same group of grid；
Judge whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；
If so, judging the display, there are negative and positive screen defects；
If it is not, then judging that negative and positive screen defect is not present in the display.
3. the method for detection display as claimed in claim 1 or 2, which is characterized in that the method for the detection display is also
Including：
When judging that obvious display defect is not present in the display, for each in accessed checkerboard image
A grid calculates the ratio shared by the corresponding frequency range of each color in the grid, and each color in the grid is corresponded to
Frequency range shared by ratio be ranked up from big to small；
Judge to be more than proportion threshold value with the presence or absence of the ratio shared by the frequency range for having sequence second in the grid of the checkerboard image；
If so, judging the display, there are the defects of bright concealed wire or crackle；
If it is not, then judging the display, there is no the defects of bright concealed wire or crackle.
4. the method for detection display as described in claim 1, which is characterized in that the method for the detection display is also wrapped
It includes：
The display brightness value of each grid is obtained from accessed checkerboard image；
For each grid, calculate the grid display brightness value and normal brightness value corresponding with the grid between the two
Luminance difference；
The quadratic sum for calculating the luminance difference of all grids obtains the luminance deviation degree of the checkerboard image；
Judge whether the luminance deviation degree is more than luminance deviation threshold value；
If so, judge that the brightness of the display is partially dark or partially bright, or there is local speck or blackening in the judgement display；
If it is not, then judging that the brightness of the display is normal.
5. a kind of device of detection display, which is characterized in that including：
Display module is controlled, generates checkerboard image for controlling picture signal generator, and control described image signal generator
The checkerboard image is sent to display to be detected, so that the display shows the checkerboard image received
Show；Wherein, the checkerboard image includes N × M grid, and the checkerboard image includes at least two different grid colors, and
The color of arbitrary neighborhood grid in transverse direction or on vertical is different；
Taking module is controlled, shoots the checkerboard image shown on the display for controlling camera, and obtain the camera
The checkerboard image taken；
Angle point judgment module, for judging whether the angle point quantity of accessed checkerboard image is H, H=(N+1) × (M+1)；
First determination module, for when the angle point quantity of accessed checkerboard image be for H when, judge that the display is not deposited
In obvious display defect；
Second determination module, for when the angle point quantity of accessed checkerboard image is not H, judging that the display exists
Obvious display defect；
Angular coordinate computing module, for judging the display there are when obvious display defect, acquired in calculating
To checkerboard image in each angle point coordinate；
Angle point chooses module, for the coordinate according to each angle point, is selected from the angle point and is not belonging to the chessboard figure
The angle point of the angular coordinate of grid as in；
Defect area determining module, for using the angle point of selection fall grid region it is aobvious as existing in the display
And the region for the display defect being clear to.
6. the device of detection display as claimed in claim 5, which is characterized in that in the chessboard figure that the display receives
As in, the color of the identical all grids of distance of the central point of the checkerboard image received apart from the display is identical, then
It is described detection display device further include：
Dispersion degree computing module is used for when judging that obvious display defect is not present in the display, will be apart from institute
The identical grid of distance of the central point of the checkerboard image got calculates the color of each group of grid as same group of grid
Dispersion degree；
Dispersion degree judgment module, for judging whether that the dispersion degree of the color of one group of grid is more than discrete threshold values；
Third determination module is used for when being more than discrete threshold values there are the dispersion degree of the color of one group of grid, described in judgement
There are negative and positive screen defects for display；
4th determination module, for when being more than discrete threshold values there is no the dispersion degree for the color for having one group of grid, judging institute
It states display and negative and positive screen defect is not present.
7. such as the device of detection display described in claim 5 or 6, which is characterized in that the device of the detection display is also
Including：
Color-ratio computing module is used for when judging that obvious display defect is not present in the display, for being obtained
Each grid in the checkerboard image got calculates the ratio shared by the corresponding frequency range of each color in the grid, and will
Ratio in the grid shared by the corresponding frequency range of each color is ranked up from big to small；
Color-ratio judgment module, for judging in the grid of the checkerboard image with the presence or absence of the frequency range institute for having sequence second
The ratio accounted for is more than proportion threshold value；
5th determination module, for when there are the ratios shared by the frequency range of sequence second to be more than in the grid of the checkerboard image
When proportion threshold value, judging the display, there are the defects of bright concealed wire or crackle；
6th determination module, for when there is no the ratio shared by the frequency range for having sequence second is big in the grid of the checkerboard image
When proportion threshold value, judging the display, there is no the defects of bright concealed wire or crackle.
8. the device of detection display as claimed in claim 5, which is characterized in that the device of the detection display also wraps
It includes：
Display brightness acquisition module, the display brightness value for obtaining each grid from accessed checkerboard image；
Luminance difference computing module, display brightness value for for each grid, calculating the grid and corresponding with the grid
Normal brightness value luminance difference between the two；
Luminance deviation computing module, the quadratic sum of the luminance difference for calculating all grids, obtains the bright of the checkerboard image
Spend extent of deviation；
Luminance deviation judgment module, for judging whether the luminance deviation degree is more than luminance deviation threshold value；
7th determination module, for when the luminance deviation degree is more than luminance deviation threshold value, judging the bright of the display
Degree is partially dark or partially bright, or the judgement display has local speck or blackening；
8th determination module, for when the luminance deviation degree is not more than luminance deviation threshold value, judging the display
Brightness is normal.
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| CN109167994A (en) * | 2018-09-12 | 2019-01-08 | 中国科学院西安光学精密机械研究所 | Image acquisition system |
| WO2020061736A1 (en) * | 2018-09-25 | 2020-04-02 | 西安诺瓦电子科技有限公司 | Failure detection method, apparatus and system for display device, and computer readable medium |
| CN110109274B (en) * | 2019-06-11 | 2022-04-12 | 江苏毅昌科技有限公司 | Picture detection device and method for liquid crystal display screen |
| CN112464936B (en) * | 2020-12-11 | 2022-12-20 | 合肥维信诺科技有限公司 | Positioning method and positioning device for abnormal display area of display module |
| CN116708793B (en) * | 2023-08-09 | 2024-01-30 | 腾讯科技（深圳）有限公司 | Video transmission method, device, equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325021A (en) * | 2007-06-15 | 2008-12-17 | 中华映管股份有限公司 | Method for detecting burning phenomenon of display |
| CN101425246A (en) * | 2007-10-31 | 2009-05-06 | 台湾薄膜电晶体液晶显示器产业协会 | Method and device for detecting ghost phenomenon of display |
| CN104517276A (en) * | 2013-09-28 | 2015-04-15 | 沈阳新松机器人自动化股份有限公司 | Checker corner detection method |
Family Cites Families (1)
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-
2016
- 2016-09-13 CN CN201610821285.4A patent/CN106412575B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101325021A (en) * | 2007-06-15 | 2008-12-17 | 中华映管股份有限公司 | Method for detecting burning phenomenon of display |
| CN101425246A (en) * | 2007-10-31 | 2009-05-06 | 台湾薄膜电晶体液晶显示器产业协会 | Method and device for detecting ghost phenomenon of display |
| CN104517276A (en) * | 2013-09-28 | 2015-04-15 | 沈阳新松机器人自动化股份有限公司 | Checker corner detection method |
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