CN106652860A - Display screen gray scale detection method and device - Google Patents
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- 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
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Abstract
The invention provides a display screen gray scale detection method, which comprises the following steps: judging whether a pixel difference value between adjacent pixel points in the image to be detected is larger than a preset pixel difference value or not; if so, displaying a coordinate point corresponding to the adjacent pixel point in a display image as a first color, wherein the display image is a scanned image of the coordinates of the pixel point in the image to be detected, and judging whether the number of color display lines formed by the coordinate point of the first color is equal to a preset numerical value or not, and automatically judging whether the gray scale detection of the display screen is qualified or not through the method by the number of the color display lines and the preset numerical value. The utility model provides a display screen gray scale detection device, first judgment module, first mark module, second judgment module and LED lamp, display screen gray scale detection device need not to pass through artifical the detection, has reduced personnel's cost and the precision is high.
Description
Technical field
The present invention relates to display screen technology field, more particularly to a kind of display screen GTG detection method and device.
Background technology
With the continuous progress of science and technology, the living standard of people is also greatly improved, and wherein display screen conduct
Equipment used in everyday has also obtained development at full speed, and display screen can show numeral, word, graph image of various changes etc.
Deng；Can be not only used for indoor environment and can be also used for outdoor environment, display screen with its brightness height, low operating voltage, small power consumption,
Miniaturization, life-span length, impact resistance and steady performance, are widely used in the fields such as household electrical appliances, industry and military affairs.
Existing display screen GTG detection method is with video camera display screen to be carried out taking pictures obtaining image, then by detection
The people of personnel gray-scale areas soon in image whether substantially, when each gray-scale areas in image are all substantially then to prove to show
The GTG detection of screen is qualified.
Existing display screen GTG detection method needs to go to be detected by artificial human eye, causes the precision for detecting
High and cause that personnel's is relatively costly, existing display screen GTG detection method can not led when the bright dark span of display screen is larger
Cause the result of GTG detection inaccurate.
The content of the invention
Based on this, the mesh of the present invention is to provide a kind of high display screen GTG detection method of precision and device.
A kind of display screen GTG detection method, methods described includes：
Judge the pixel value difference between the neighbor pixel in altimetric image to be checked whether more than default pixel value difference；
If so, then coordinate points corresponding with the neighbor pixel in display image are shown as into the first color, it is described aobvious
Diagram picture is the scan image of the coordinate of the pixel in the altimetric image to be checked, and judges the coordinate points shape of first color
Into color show that whether the quantity of line be equal to default value；
If so, then conclude that the GTG detection of the display screen is qualified.
Above-mentioned display screen GTG detection method, the color formed by the coordinate points of first color show line come
Represent the contact line between each gray-scale areas of the display screen, and then by judging the color show that the quantity of line is again
It is qualified that the no mode equal to the default value is detected whether the GTG that judges the display screen, when the color shows line
When quantity is equal to the default value, then the GTG detection of the display screen is qualified, and this method need not be reduced by manual detection
Personnel cost and precision is high.
Further, whether the pixel value difference between the neighbor pixel judged in altimetric image to be checked is more than default
Before the step of pixel value difference, methods described also includes：
Carry out that high exposure mode is taken pictures and low exposure mode is taken pictures respectively to the display screen, get the display screen
High exposure image and low exposure image；
Intercept the half-light image of the high exposure image and the light image of the low exposure image, and by the half-light figure
Picture and the light image are synthesized, and obtain the altimetric image to be checked；
The coordinate of the pixel in the altimetric image to be checked is scanned and obtains display image.
Further, methods described also includes：
The pixel value difference between neighbor pixel in determine the altimetric image to be checked is not more than default pixel difference
During value：
Coordinate points corresponding with the neighbor pixel in the display image are shown as into the second color.
Further, judge that the color that the coordinate points of first color are formed shows whether the quantity of line is equal to present count
The step of value, includes：
Calculate the quantity that the color shows line；
The grey exponent number of inquiry current gray detection；
The numerical value of the grey exponent number is subtracted 1 and obtains qualified numerical value；
Judge that the color shows the quantity of line and the size of the qualified numerical value.
Further, first color adopts black, and the time for exposure that the high exposure mode is taken pictures is 5 milliseconds, institute
It is 0.6 millisecond to state the time for exposure that low exposure mode takes pictures.
A kind of display screen GTG detection means, the display screen GTG detection means includes：
First judge module, for judging altimetric image to be checked in neighbor pixel between pixel value difference whether more than pre-
If pixel value difference；
First mark module, for according to the judged result of first judge module, when determining the mapping to be checked
When the pixel value difference between neighbor pixel as in is more than the default pixel value difference, to adjacent with described in display image
The corresponding coordinate points of pixel carry out color mark and form color display line；
Second judge module, for judging that whether etc. color that the coordinate points of first color are formed shows the quantity of line
In default value；
LED, for according to the judged result of second judge module, when the quantity for determining the color display line
During equal to the default value, light is sent.
Above-mentioned display screen GTG detection means, the color formed by first mark module shows line to represent
Contact line between each gray-scale areas of the display screen, so again by second judge module judge the color show
Whether the quantity of timberline is equal to the default value, described when the color shows the quantity of line equal to the default value
LED sends light, then conclude that the GTG detection of the display screen is qualified, and this method need not reduce people by manual detection
Member's cost and precision height.
Further, the display screen GTG detection means also includes：
Height exposure photo module, takes pictures for carrying out high exposure to the display screen, obtains the high exposure of the display screen
Image；
Low exposure photo module, takes pictures for carrying out low exposure to the display screen, obtains the low exposure of the display screen
Image；
Interception module, it is right for according to the result of taking pictures of the high exposure photo module and the low exposure photo module
The light image of the half-light image of the high exposure image and the low exposure image is intercepted；
Synthesis module, for according to the intercepting result of the interception module, by the high exposure image and the low exposure
Image synthesizes the altimetric image to be checked；
Scan module, for according to the composite result of the synthesis module, carrying out to the pixel of the altimetric image to be checked
Scanning obtains effect display image, and sends to first judge module and judged.
Further, the display screen GTG detection means also includes：
Second mark module, for according to the judged result of first judge module, when determining the mapping to be checked
As in neighbor pixel between pixel value difference be not more than the default pixel value difference when, in the display image with institute
Stating the corresponding coordinate points of neighbor pixel carries out color mark.
Further, second judge module includes：
First computing module, for calculating the quantity that color described in the display image shows line；
Enquiry module, for inquiring about the GTG numerical value of the current gray detection of user's setting；
Second computing module, for according to the Query Result of the enquiry module, subtracting 1 by the GTG numerical value and obtaining qualified
Numerical value；
3rd judge module, for according to the result of calculation of first computing module and second computing module, sentencing
The disconnected color shows the quantity of line and the size of the qualified numerical value.
Further, the marker color that first mark module is adopted is black, the exposure of the high exposure photo module
The light time is 5 milliseconds, and the time for exposure of the low exposure exposal model is 0.6 millisecond.
Description of the drawings
The flow chart of the display screen GTG detection method that Fig. 1 is provided for first embodiment of the invention；
The flow chart of the display screen GTG detection method that Fig. 2 is provided for second embodiment of the invention；
The structural representation of the display screen GTG detection means 100 that Fig. 3 is provided for third embodiment of the invention；
The structural representation of the display screen GTG detection means 200 that Fig. 4 is provided for fourth embodiment of the invention；
Essential element symbol description
Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.
Specific embodiment
For the ease of more fully understanding the present invention, the present invention is carried out further below in conjunction with related embodiment accompanying drawing
Explain.Embodiments of the invention are given in accompanying drawing, but the present invention is not limited in above-mentioned preferred embodiment.On the contrary, there is provided
The purpose of these embodiments be in order that disclosure of the invention face more fully.
Fig. 1 is referred to, the flow chart of the display screen GTG detection method provided for first embodiment of the invention, including step
S10 to S30.
Whether step S10, judge the pixel value difference between the neighbor pixel in altimetric image to be checked more than default pixel
Difference；
When the pixel value difference between the neighbor pixel that the step 10 is determined in the altimetric image to be checked is more than default
Pixel value difference when, execution step S20.
Coordinate points corresponding with the neighbor pixel in display image are shown as the first color by step S20；
Wherein, the display image is the scan image of the coordinate of the pixel in the altimetric image to be checked；
Step S30, judges that the color that the coordinate points of first color are formed shows whether the quantity of line is equal to present count
Value；
Step S40, draws testing result；
Wherein, when the color that the coordinate points that step S30 determines first color are formed shows quantity of line etc.
When default value, then step S40 concludes that the GTG detection of the display screen is qualified；
When step S30 determine first color coordinate points formed color show line quantity be not equal to it is pre-
If during numerical value, then step S40 concludes that the GTG detection of the display screen is unqualified.
The present embodiment shows line to represent each of the display screen by the color that first mark module is formed
Contact line between individual gray-scale areas, and then by second judge module judge whether the color shows the quantity of line again
Equal to the default value, when the color shows the quantity of line equal to the default value, the LED sends light,
Then conclude that the GTG detection of the display screen is qualified, this method need not reduce personnel cost and precision by manual detection
It is high.
Fig. 2 is referred to, the flow chart of the display screen GTG detection method provided for second embodiment of the invention, including step
S11 to S91.
Step S11, carries out respectively that high exposure mode is taken pictures and low exposure mode is taken pictures to the display screen, gets described
The high exposure image and low exposure image of display screen；
Step S21, intercepts the half-light image of the high exposure image and the light image of the low exposure image, and by institute
State half-light image and the light image is synthesized, obtain the altimetric image to be checked；
Step S31, is scanned to the coordinate of the pixel in the altimetric image to be checked and obtains display image；
Whether step S41, judge the pixel value difference between the neighbor pixel in altimetric image to be checked more than default pixel
Difference；
Wherein, judge the pixel value difference between the neighbor pixel in the altimetric image to be checked whether more than default pixel
The mode of difference is：
The mean value m of the neighbor pixel is calculated, if the original image vegetarian refreshments of the neighbor pixel is p；
If then p is not more than m-param, it is judged as that the pixel value difference between the neighbor pixel is no more than default
Pixel value difference；
If p is more than m-param, it is judged as that the pixel value difference between the neighbor pixel is more than default pixel difference
Value；
Wherein, the param be constant, can value be -255 to 255 arbitrary integer；
When the pixel value difference between the neighbor pixel that the step 41 is determined in the altimetric image to be checked is more than default
Pixel value difference when, execution step S51.
Coordinate points corresponding with the neighbor pixel in display image are shown as the first color by step S51；
When the pixel value difference between the neighbor pixel that the step 41 is determined in the altimetric image to be checked is not more than in advance
If pixel value difference when, execution step S61.
Coordinate points corresponding with the neighbor pixel in display image are shown as the second color by step S61；
Step S71, calculates the quantity that the color shows line, inquires about the grey exponent number of current gray detection；
Step S81, subtracts 1 and obtains qualified numerical value by the numerical value of the grey exponent number, and judges that the color shows line
Quantity it is whether equal with the qualified numerical value；
Step S91, draws testing result；
Wherein, when the color that the coordinate points that step S81 determines first color are formed shows quantity of line etc.
When the default value, then step S91 concludes that the GTG detection of the display screen is qualified；
When the color that the coordinate points that step S81 determines first color are formed shows that the quantity of line is not equal to institute
When stating default value, then step S91 concludes that the GTG detection of the display screen is unqualified.
Wherein, first color adopts black, and second color is using white, the exposure that the high exposure mode is taken pictures
The light time is 5 milliseconds, and the time for exposure that the low exposure mode is taken pictures is 0.6 millisecond.
The flow process of the present embodiment is：Carry out the high exposure mode respectively to the display screen to take pictures and the low exposure mould
Formula is taken pictures, and gets the high exposure image and the low exposure image, then to the high exposure image and the low exposure diagram
As being intercepted and being synthesized, and then the altimetric image to be checked is obtained, the pixel in the altimetric image to be checked is carried out after surface sweeping
Obtain the display image, then by judging the altimetric image to be checked in neighbor pixel between pixel value difference whether be more than
The mode of default pixel value difference obtains the display line, obtains the grey exponent number of the display screen current gray detection, then by institute
The numerical value for stating grey exponent number subtracts 1 and obtains qualified numerical value, and the quantity of the qualified numerical value and the display line whether phase is finally judged again
Deng, when the qualified numerical value be equal to it is described display line quantity when, then prove the display GTG detection it is qualified.
This method need not reduce personnel cost and precision be high by manual detection.
Fig. 3 is referred to, the structural representation of the display screen GTG detection means 100 provided for third embodiment of the invention,
The display screen GTG detection means 100 includes：
First judge module 10, for judging altimetric image to be checked in neighbor pixel between pixel value difference whether be more than
Default pixel value difference；
First mark module 11, it is described to be checked when determining for according to the judged result of first judge module 10
The pixel value difference between neighbor pixel in altimetric image be more than the default pixel value difference when, in display image with it is described
The corresponding coordinate points of neighbor pixel carry out color mark and form color display line；
Second judge module 20, for judging quantity that the color that the coordinate points of first color are formed shows line whether
Equal to default value, for example when the display screen carry out be that 16 GTGs are detected when, the default value is just 15, only
When it is 15 that the color that first mark module 11 is formed shows the quantity of line, the 16 GTGs inspection of the display screen
Survey just qualified；
LED 12, for according to the judged result of second judge module 20, when the color is determined line being shown
When quantity is equal to the default value, send light, so when the display screen carry out be that 16 GTGs are detected when, only when
When the quantity of the color display line that first mark module 11 is formed is 15, the LED 12 can just send light；
The display screen GTG detection means 100 also includes：
Height exposure photo module 13, takes pictures for carrying out high exposure to the display screen, obtains the high exposure of the display screen
Light image, the half-light image of the high exposure diagram is more accurate, but the light image of the high exposure diagram due to the time for exposure compared with
It is very inaccurate that length causes gray-scale areas to be difficult to difference；
Low exposure photo module 14, takes pictures for carrying out low exposure to the display screen, obtains the low exposure of the display screen
Light image, the light image of the low exposure diagram is more accurate, but the half-light image of the low exposure diagram due to the time for exposure compared with
It is very inaccurate that short-range missile causes gray-scale areas to be difficult to difference；
Interception module 15, for according to the knot of taking pictures of the high exposure photo module 13 and the low exposure photo module 14
Really, to the high exposure image half-light image and the light image of the low exposure image is intercepted；
Synthesis module 16, for according to the intercepting result of the interception module 15, by the high exposure image and described low
Exposure image synthesizes the altimetric image to be checked；
Scan module 17, for according to the composite result of the synthesis module 16, the pixel to the altimetric image to be checked
It is scanned and obtains effect display image, and sends to first judge module 10 and judged；
Second judge module 20 includes：
First computing module 21, for calculating the quantity that color described in the display image shows line；
Enquiry module 22, for inquiring about the GTG numerical value of the current gray detection of user's setting；
Second computing module 23, for according to the Query Result of the enquiry module 22, subtracting 1 by the GTG numerical value and obtaining
Qualified numerical value；
3rd judge module 24, for being tied according to the calculating of first computing module 21 and second computing module 23
Really, judge that the color shows the quantity of line and the size of the qualified numerical value；
The marker color that first mark module 11 is adopted is black, the time for exposure of the high exposure photo module 13
For 5 milliseconds, the time for exposure of the low exposure exposal model 14 is 0.6 millisecond.
The color of the black that the present embodiment is formed by first mark module 11 shows line to represent described aobvious
Contact line between each gray-scale areas of display screen, and then by second judge module 20 judge that the color shows line again
Quantity whether be equal to the default value, when the color shows the quantity of line is equal to the default value when, the LED
12 send light, then conclude that the GTG detection of the display screen is qualified, and the present embodiment need not reduce personnel by manual detection
Cost and precision height.
Fig. 4 is referred to, the structural representation of the display screen GTG detection means 200 provided for fourth embodiment of the invention,
The fourth embodiment is more or less the same with the structure of 3rd embodiment, and its difference is that display screen GTG described in the present embodiment is examined
Surveying device 200 also includes：
Second mark module 30, it is described to be checked when determining for according to the judged result of first judge module 10
When the pixel value difference between neighbor pixel in altimetric image is not more than the default pixel value difference, in the display image
Coordinate points corresponding with the neighbor pixel carry out color mark, and the marker color that second mark module 30 is adopted is white
Color；
The design that the present embodiment passes through second mark module 30 so that the color shows line in the display image
In it is more obvious and be more easily detected, and then improve the efficiency and accurately of the display screen GTG detection means 200
Property.
The know-why of the present invention is above embodiment described, these descriptions are intended merely to explain the principle of the present invention, and
The restriction of the scope of the present invention can not be by any way construed to.Based on explanation herein, those skilled in the art is not required to
Other specific embodiments of the present invention are associated by paying performing creative labour, these modes fall within the present invention's
In protection domain.
Claims (10)
1. a kind of display screen GTG detection method, it is characterised in that methods described includes：
Judge the pixel value difference between the neighbor pixel in altimetric image to be checked whether more than default pixel value difference；
If so, then coordinate points corresponding with the neighbor pixel in display image are shown as into the first color, the display figure
As the scan image of the coordinate for the pixel in the altimetric image to be checked, and judge the coordinate points formation of first color
Color shows whether the quantity of line is equal to default value；
If so, then conclude that the GTG detection of the display screen is qualified.
2. display screen GTG detection method according to claim 1, it is characterised in that in judgement altimetric image to be checked
Before the step of whether pixel value difference between neighbor pixel is more than default pixel value difference, methods described also includes：
Carry out that high exposure mode is taken pictures and low exposure mode is taken pictures respectively to the display screen, get the high exposure of the display screen
Light image and low exposure image；
Intercept the half-light image of the high exposure image and the light image of the low exposure image, and by the half-light image and
The light image is synthesized, and obtains the altimetric image to be checked；
The coordinate of the pixel in the altimetric image to be checked is scanned and obtains display image.
3. display screen GTG detection method according to claim 1, it is characterised in that methods described also includes：
When the pixel value difference between the neighbor pixel in determining the altimetric image to be checked is not more than default pixel value difference：
Coordinate points corresponding with the neighbor pixel in the display image are shown as into the second color.
4. display screen GTG detection method according to claim 1, it is characterised in that judge the coordinate of first color
The color that point is formed shows that the quantity of line includes the step of whether being equal to default value：
Calculate the quantity that the color shows line；
The grey exponent number of inquiry current gray detection；
The numerical value of the grey exponent number is subtracted 1 and obtains qualified numerical value；
Judge that the color shows the quantity of line and the size of the qualified numerical value.
5. display screen GTG detection method according to claim 2, it is characterised in that first color adopts black,
The time for exposure that the high exposure mode is taken pictures is 5 milliseconds, and the time for exposure that the low exposure mode is taken pictures is 0.6 millisecond.
6. a kind of display screen GTG detection means, it is characterised in that the display screen GTG detection means includes：
First judge module, for judging altimetric image to be checked in neighbor pixel between pixel value difference whether more than default
Pixel value difference；
First mark module, for according to the judged result of first judge module, in the altimetric image to be checked is determined
Neighbor pixel between pixel value difference be more than the default pixel value difference when, in display image with the neighbor
The corresponding coordinate points of point carry out color mark and form color display line；
Second judge module, for judging that the color that the coordinate points of first color are formed shows whether the quantity of line is equal in advance
If numerical value；
LED, for according to the judged result of second judge module, showing that the quantity of line is equal to when the color is determined
During the default value, light is sent.
7. display screen GTG detection means according to claim 6, it is characterised in that the display screen GTG detection means
Also include：
Height exposure photo module, takes pictures for carrying out high exposure to the display screen, obtains the high exposure image of the display screen；
Low exposure photo module, takes pictures for carrying out low exposure to the display screen, obtains the low exposure image of the display screen；
Interception module, for according to the result of taking pictures of the high exposure photo module and the low exposure photo module, to described
The light image of the half-light image of high exposure image and the low exposure image is intercepted；
Synthesis module, for according to the intercepting result of the interception module, by the high exposure image and the low exposure image
Synthesize the altimetric image to be checked；
Scan module, for according to the composite result of the synthesis module, being scanned to the pixel of the altimetric image to be checked
Effect display image is obtained, and is sent to first judge module and is judged.
8. display screen GTG detection means according to claim 6, it is characterised in that the display screen GTG detection means
Also include：
Second mark module, for according to the judged result of first judge module, in the altimetric image to be checked is determined
Neighbor pixel between pixel value difference when being not more than the default pixel value difference, in the display image with the phase
The corresponding coordinate points of adjacent pixel carry out color mark.
9. display screen GTG detection means according to claim 6, it is characterised in that second judge module includes：
First computing module, for calculating the quantity that color described in the display image shows line；
Enquiry module, for inquiring about the GTG numerical value of the current gray detection of user's setting；
Second computing module, for according to the Query Result of the enquiry module, subtracting 1 by the GTG numerical value and obtaining passing number
Value；
3rd judge module, for according to the result of calculation of first computing module and second computing module, judging institute
State color and show the quantity of line and the size of the qualified numerical value.
10. display screen GTG detection means according to claim 7, it is characterised in that first mark module is adopted
Marker color be black, the time for exposure of the high exposure photo module is 5 milliseconds, the exposure of the low exposure exposal model
Time is 0.6 millisecond.
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