CN106934792B - 3D effect detection method, device and system of display module - Google Patents
3D effect detection method, device and system of display module Download PDFInfo
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Abstract
The invention provides a method, a device and a system for detecting a 3D effect of a display module, wherein the method comprises the following steps: acquiring a first image of a display fringe pattern of a display module, calculating a grating joint angle of the first image, and determining a chart arrangement angle corresponding to the grating joint angle; determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to obtain a third image with a stripe center point positioned at the center point of the display module screen; adjusting the stripe width of the third image to obtain a fourth image with the stripe width being more than or equal to the width of the display module screen; and detecting the brightness of the fourth image, and calculating a display module crosstalk value according to the detection result or calculating the display module crosstalk of the shot fourth image processed according to the preset color mapping relation. The embodiment of the invention can simply and quickly detect the 3D effect of the display module, and obtain a stable and reliable crosstalk result, thereby obtaining a stable and reliable 3D effect detection result.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method, a device and a system for detecting a 3D effect of a display module.
Background
The 3D effect of module when 3D cell-phone produces among the prior art is difficult to carry out simple quick detection owing to receive the influence of camera reduction degree, module colour temperature and module luminance, and often can appear in the testing process because the different, the different problem that makes the result of detecting the crosstalk of fringe number difference, position.
Disclosure of Invention
The invention aims to provide a method, a device and a system for detecting a 3D effect of a display module, and aims to solve the problems that the 3D effect of the module is difficult to detect simply and quickly during the production of a 3D mobile phone in the prior art, and the detection result of crosstalk is different due to different numbers and positions of stripes in the detection process.
The embodiment of the invention provides a method for detecting a 3D effect of a display module, which comprises the following steps:
acquiring a first image of a display module for displaying a fringe pattern, calculating a grating joint angle of the first image, and determining a pattern arrangement angle corresponding to the grating joint angle;
determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to enable a stripe central point of the second image to be located at a central point of a display module screen to obtain a third image;
adjusting the stripe width of the third image by adjusting the display pixels, so that the stripe width is larger than or equal to the width of a display module screen, and obtaining a fourth image;
determining the maximum brightness value and the minimum brightness value of the fourth image obtained by detection in a period of the horizontal deviation value, and calculating a crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
Wherein the calculating a grating fit angle of the first image comprises:
determining a first stripe angle of the first image according to a first row diagram parameter, and recording the first stripe angle and the first row diagram parameter;
changing the first layout parameter into a second layout parameter, determining a second stripe angle of the first image according to the second layout parameter, and recording the second stripe angle and the second layout parameter;
changing the second layout parameter into a third layout parameter, determining a third stripe angle and recording the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and calculating the grating attaching angle according to the preset number of fringe angles, the layout parameters and the relationship among the fringe angles, the layout parameters and the layout parameters, wherein the first layout parameter is a default layout parameter.
Wherein the determining a first streak angle for the first image from the first ranking parameter comprises:
determining the distribution direction of a first stripe of the first image according to the first arrangement parameter;
graying the first stripe and finding the edge of the first stripe;
analyzing the edge point set vector of the first stripe by using a principal component analysis algorithm, and fitting an edge straight line according to the point set to determine an edge line of the first stripe;
and determining the angle of the first stripe according to the edge line of the first stripe.
Wherein, prior to the adjusting the lateral offset value of the second image, the method further comprises:
acquiring a second image with stripes of different colors;
extracting the hue of the second image, and detecting boundary lines of different color stripes according to the hue;
judging whether the central line of any stripe passes through the central point of the screen of the display module;
and when the judgment result is negative, adjusting the transverse offset value of the second image.
Wherein, the determining the maximum brightness value and the minimum brightness value of the fourth image obtained by detection at a period of the horizontal deviation value, and calculating the crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module includes:
detecting the brightness value of the fourth image for each horizontal deviation value in the fourth image period, and determining the minimum brightness value and the maximum brightness value;
and calculating the crosstalk value of the display module by utilizing the ratio of the minimum brightness value to the maximum brightness value or the ratio of the minimum brightness value to the maximum brightness value and the difference value of the minimum brightness value to the minimum brightness value so as to detect the 3D effect of the display module.
Wherein, the crosstalk calculation is performed on the fourth image shot according to the preset color mapping relationship to detect the 3D effect of the display module, including:
counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image processed according to the preset color mapping relation;
aiming at any stripe, calculating the ratio of the number of secondary pixel points to the number of primary pixel points to obtain a first crosstalk value;
and calculating the average value of the N first crosstalk values, and determining the crosstalk value of the display module so as to detect the 3D effect of the display module.
Before performing crosstalk calculation on the shot fourth image processed according to the preset color mapping relationship to detect the 3D effect of the display module, the method further includes:
establishing a color mapping relation between colors in a screen of a display module and images shot by the screen of the display module;
and performing color restoration on the shot fourth image according to the color mapping relation.
Wherein the method further comprises:
and detecting the brightness values of the fourth image at different heights to calculate the crosstalk value of the display module in the space.
The embodiment of the present invention further provides a device for detecting a 3D effect of a display module, including:
the acquisition processing module is used for acquiring a first image of a display stripe image of a display module, calculating a grating joint angle of the first image, and determining a layout angle corresponding to the grating joint angle
The determining and adjusting module is used for determining that the image with the layout angle attribute is a second image, and adjusting a transverse offset value of the second image to enable a stripe center point of the second image to be located at a center point of a display module screen to obtain a third image;
the adjustment acquisition module is used for adjusting the stripe width of the third image by adjusting the display pixels, so that the stripe width is larger than or equal to the width of a display module screen to obtain a fourth image;
the calculation detection module is used for determining the maximum brightness value and the minimum brightness value obtained by detecting the fourth image under a periodic horizontal deviation value, and calculating the crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
Wherein the acquisition processing module comprises:
the first recording submodule is used for determining a first streak angle of the first image according to a first streak parameter and recording the first streak angle and the first streak parameter;
the second recording submodule is used for changing the first chart arrangement parameter into a second chart arrangement parameter, determining a second stripe angle of the first image according to the second chart arrangement parameter, and recording the second stripe angle and the second chart arrangement parameter;
the third recording submodule is used for changing the second layout parameter into a third layout parameter, determining a third stripe angle and recording the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and the calculation submodule is used for calculating the grating fitting angle according to the preset number of fringe angles, the layout parameters and the relationship among the preset number of the layout parameters, wherein the first layout parameter is a default layout parameter.
Wherein the first recording sub-module includes:
a first determining unit, configured to determine a distribution direction of a first stripe of the first image according to the first ranking parameter;
the searching unit is used for graying the first stripe and searching the edge of the first stripe;
the second determining unit is used for analyzing the edge point set vector of the first stripe by utilizing a principal component analysis algorithm and determining the edge line of the first stripe according to the point set fitting edge straight line;
and the third determining unit is used for determining the angle of the first stripe according to the edge line of the first stripe.
Wherein the apparatus further comprises:
an obtaining module, configured to obtain a second image with stripes of different colors before the determining and adjusting module adjusts the lateral offset value of the second image;
the extraction detection module is used for extracting the hue of the second image and detecting the boundary of different color stripes according to the hue;
the judging module is used for judging whether the central line of any stripe passes through the central point of the screen of the display module;
and the driving module is used for driving the determining and adjusting module to adjust the transverse offset value of the second image when the judgment result is negative.
Wherein the calculation detection module comprises:
a detection determining sub-module, configured to detect, for each lateral offset value in a cycle of the fourth image, a luminance value of the fourth image, and determine a minimum luminance value and a maximum luminance value;
and the first calculation and detection submodule is used for calculating the crosstalk value of the display module by utilizing the ratio of the minimum brightness value to the maximum brightness value or the ratio of the minimum brightness value to the maximum brightness value and the minimum brightness value difference value so as to detect the 3D effect of the display module.
Wherein the calculation detection module comprises:
the counting submodule is used for counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image processed according to the preset color mapping relation;
the calculation acquisition submodule is used for calculating the ratio of the number of the secondary pixel points to the number of the primary pixel points aiming at any stripe to acquire a first crosstalk value;
and the second calculation detection submodule is used for calculating the average value of the N first crosstalk values, determining the crosstalk value of the display module and further detecting the 3D effect of the display module.
Wherein the apparatus further comprises:
the establishing module is used for establishing a color mapping relation between colors in a screen of the display module and images shot by the screen of the display module before the calculation and detection module carries out crosstalk calculation on the shot fourth images processed according to the preset color mapping relation to detect the 3D effect of the display module;
and the restoring module is used for carrying out color restoration on the shot fourth image according to the color mapping relation.
Wherein the apparatus further comprises:
and the detection calculation module is used for detecting the brightness value of the fourth image at different heights to calculate the crosstalk value of the display module in the space.
The embodiment of the present invention further provides a 3D effect detection system for a display module, including:
an equipment chassis, the equipment chassis comprising: the lighting panel and the display module are arranged on the lighting panel and connected with the lighting panel; the CCD industrial camera is positioned right above the display module, and the detector is positioned on the same horizontal line with the CCD industrial camera and used for detecting the brightness; and
and the PC is connected with the detector, the CCD industrial camera and the lighting board respectively.
The technical scheme of the invention has the following beneficial effects:
according to the embodiment of the invention, after a first image of a stripe image displayed by a display module is obtained, a grating attaching angle of the first image is calculated, a diagram arranging angle corresponding to the grating attaching angle is determined, a second image is determined according to the diagram arranging angle, a transverse offset value of the second image is adjusted, a third image with a stripe central point positioned at the central point of a screen of the display module is obtained, the stripe width of the third image is adjusted, a fourth image with the stripe width larger than or equal to the width of the screen of the display module is obtained, then brightness detection is carried out on the fourth image, a display module crosstalk value is calculated according to a detection result or display module crosstalk calculation is carried out on a picture of the fourth image processed according to a preset color mapping relation, and a 3D effect of the display module is detected according to the calculated display module crosstalk result. The embodiment of the invention can simply and quickly detect the 3D effect of the display module and obtain a stable and reliable crosstalk result so as to further obtain a stable and reliable 3D effect detection result, thereby avoiding the problems that the 3D effect of the module is difficult to be simply and quickly detected when a 3D mobile phone is produced, and the crosstalk result is different due to different numbers and positions of stripes in the detection process.
Drawings
Fig. 1 is a first schematic view illustrating a 3D effect detection method of a display module according to an embodiment of the present invention;
FIG. 2 is a second schematic view illustrating a method for detecting a 3D effect of a display module according to an embodiment of the invention;
fig. 3 is a third schematic view illustrating a 3D effect detection method of a display module according to an embodiment of the invention;
fig. 4 is a fourth schematic view illustrating a 3D effect detection method of a display module according to an embodiment of the invention;
fig. 5 is a schematic diagram illustrating a fifth method for detecting a 3D effect of a display module according to an embodiment of the invention;
fig. 6 is a sixth schematic view illustrating a 3D effect detection method of a display module according to an embodiment of the present invention;
fig. 7 is a seventh schematic view illustrating a 3D effect detection method of a display module according to an embodiment of the invention;
fig. 8 is an eighth schematic view illustrating a method for detecting a 3D effect of a display module according to an embodiment of the invention;
fig. 9 is a schematic overall flow chart of a 3D effect detection method of a display module according to an embodiment of the present invention;
FIG. 10 is a schematic view illustrating an overall process of a 3D effect detection method of a display module according to an embodiment of the invention;
fig. 11 is a first schematic view of a 3D effect detection apparatus of a display module according to an embodiment of the present invention;
fig. 12 is a second schematic view of a 3D effect detection apparatus of a display module according to an embodiment of the invention;
fig. 13 is a schematic view of a 3D effect detection system of a display module according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a method for detecting a 3D effect of a display module, which comprises the following steps of:
s100, acquiring a first image of a display stripe image of a display module, calculating a grating joint angle of the first image, and determining a layout angle corresponding to the grating joint angle;
s200, determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to enable a stripe central point of the second image to be located at a central point of a display module screen to obtain a third image;
s300, adjusting the stripe width of the third image by adjusting the display pixels to enable the stripe width to be larger than or equal to the width of a display module screen, and obtaining a fourth image;
s400, determining the maximum brightness value and the minimum brightness value of the fourth image obtained by detection under a period of horizontal deviation value, and calculating the crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
Specifically, a first image of a display stripe image displayed by the display module is obtained, a grating attaching angle of the first image is calculated according to related parameters, and a layout angle corresponding to the grating attaching angle is determined according to a corresponding relation between the grating attaching angle and the layout angle. Wherein the related parameters at least comprise a first layout parameter, a changed layout parameter and a stripe angle determined according to the layout parameter.
After the arrangement angle is determined, determining that the image with the arrangement angle attribute is a second image, then adjusting a transverse offset value of the second image to enable a central point of a stripe to coincide with the central point of the display module screen, and determining that the second image with the central point of the stripe coinciding with the central point of the display module screen is a third image.
And then adjusting the display pixels of the third image to further adjust the stripe width of the third image, so that the stripe width is larger than or equal to the width of the display module screen, and determining the third image with the stripe width larger than or equal to the width of the display module screen as a fourth image.
It should be noted that the stripe pattern of the first image may be a black and white stripe pattern, a red and green stripe pattern, or other stripe patterns, which are not described in detail herein.
After the layout angle is determined, a second image can be determined on the screen of the display module, and then the second image is photographed through a CCD industrial camera. When the horizontal deviation value of the second image is adjusted, the second image on the screen of the display module is actually adjusted, so that a stripe central point of the second image is located at the central point of the screen of the display module, and the second image with the stripe central point located at the central point of the screen of the display module is determined to be a third image.
The third image is a third image on the screen of the display module, and the third image is photographed through the CCD industrial camera. When the stripe width of the third image is adjusted, the third image on the screen of the display module is adjusted, the stripe width of the third image is adjusted through adjusting the display pixels, so that the stripe width is larger than or equal to the width of the screen of the display module, and the third image with the stripe width larger than or equal to the width of the screen of the display module is determined to be a fourth image. In the process of adjusting the stripe width, the number of stripes on the display module screen is changed from a plurality of stripes to one stripe as the stripe width increases.
And then determining brightness values of a fourth image on the screen of the display module through detection under a period of lateral deviation values, determining a maximum brightness value and a minimum brightness value in the obtained multiple brightness values, and then calculating a crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module. Here, the brightness value of the fourth image at the one period of the lateral offset value needs to be detected by the detector.
Or after the fourth image is determined, shooting through a CCD industrial camera, restoring the shot fourth image according to a preset color mapping relation, and performing crosstalk calculation according to the restored shot fourth image to detect the 3D effect of the display module.
According to the embodiment of the invention, after a first image of a stripe image displayed by a display module is obtained, a grating attaching angle of the first image is calculated, a diagram arranging angle corresponding to the grating attaching angle is determined, a second image is determined according to the diagram arranging angle, a transverse offset value of the second image is adjusted, a third image with a stripe central point positioned at the central point of a screen of the display module is obtained, the stripe width of the third image is adjusted, a fourth image with the stripe width larger than or equal to the width of the screen of the display module is obtained, then brightness detection is carried out on the fourth image, a display module crosstalk value is calculated according to a detection result or display module crosstalk calculation is carried out on a picture of the fourth image processed according to a preset color mapping relation, and a 3D effect of the display module is detected according to the calculated display module crosstalk result. The embodiment of the invention can simply and quickly detect the 3D effect of the display module and obtain a stable and reliable crosstalk result so as to further obtain a stable and reliable 3D effect detection result, thereby avoiding the problems that the 3D effect of the module is difficult to be simply and quickly detected when a 3D mobile phone is produced, and the crosstalk result is different due to different numbers and positions of stripes in the detection process.
In the above embodiment of the present invention, the calculating the grating attaching angle of the first image in step S100, as shown in fig. 2, includes:
s101, determining a first stripe angle of a first image according to a first row pattern parameter, and recording the first stripe angle and the first row pattern parameter;
s102, changing the first layout parameter into a second layout parameter, determining a second stripe angle of the first image according to the first layout parameter, and recording the second stripe angle and the second layout parameter;
s103, changing the second layout parameter into a third layout parameter, determining a third stripe angle and recording the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and S104, calculating the grating attaching angle according to the preset number of the fringe angles, the layout parameters and the relationship among the fringe angles, the layout parameters and the layout parameters, wherein the first layout parameter is a default layout parameter.
Specifically, when calculating the grating attachment angle of the first image, first a first layout parameter needs to be obtained, and a first stripe angle corresponding to the first layout parameter is obtained by using an angle detection algorithm according to the first layout parameter, so that the first image in the current state can be photographed at this time. The first streak angle and the first drainage parameters are recorded. When the first stripe angle is recorded, the recording can be carried out by adopting a CCD industrial camera photographing mode.
And then changing the first layout parameter into a second layout parameter, and acquiring a second stripe angle corresponding to the second layout parameter by adopting an angle detection algorithm, wherein the first image in the current state can be photographed at the moment. And recording the second stripe angle and the second layout parameter, and recording by adopting a CCD industrial camera photographing mode when recording the second stripe angle.
And then changing the second layout parameter into a third layout parameter, and acquiring a third stripe angle corresponding to the third layout parameter by adopting an angle detection algorithm, wherein the first image in the current state can be photographed at the moment. And recording a third stripe angle and a third row drawing parameter, and recording by adopting a CCD industrial camera photographing mode when recording the third stripe angle.
Repeating the operation, obtaining the preset number of stripe angles and the arrangement parameters, and calculating to obtain the grating attachment angle according to the preset number of stripe angles, the arrangement parameters and the mutual relation. The preset number is preset, and may be more than three sets or less than three sets, and is not limited to the three sets or more of data listed in the embodiment.
In the above embodiment of the present invention, the determining the first streak angle of the first image according to the first ranking parameter in step S101 includes, as shown in fig. 3:
s1011, determining the distribution direction of the first stripes of the first image according to the first layout parameters;
s1012, graying the first stripe and finding the edge of the first stripe;
s1013, analyzing the edge point set vector of the first stripe by using a principal component analysis algorithm, and fitting an edge straight line according to the point set to determine an edge line of the first stripe;
and S1014, determining the angle of the first stripe according to the edge line of the first stripe.
It should be noted that, the display module often includes not only the display image but also the background around the display image, so the picture obtained by using the CCD industrial camera usually has a black background. At this point, the photograph needs to be cut. The common mode is that fixed target region ROI is adopted for intercepting, and the display module is placed in a fixed clamping groove, and general ROI can not be changed. If the fixed ROI is not used, quadrilateral block areas of the photos acquired by the camera can be searched, then detected quadrilaterals are merged and classified by utilizing a merging and dividing algorithm, and finally, which area is the best area is decided by each dividing weight to serve as the detected screen area.
Specifically, when the first stripe angle of the first image is determined, a camera may be used to capture the first stripe angle to obtain a photo of the first image, the obtained photo often has a background, the photo is intercepted to obtain a photo of the required stripe image, and the stripe angle is determined by using the photo of the stripe image.
When the first stripe angle is calculated, the distribution direction of the first stripe needs to be determined according to the first row of drawing parameters, and then the first stripe is subjected to ashing treatment to find the edge of the first stripe. And then analyzing point set vectors of two edges of the first stripe by adopting a principal component analysis algorithm, fitting according to a point set of one edge to obtain a first straight line, and fitting according to a point set of the other edge to obtain a second straight line. The first line and the second line are edge lines of the first stripe. And determining the angle of the first stripe according to the edge line of the first stripe.
When the angle of the second stripe is determined, the same principle is adopted, namely the distribution direction of the second stripe is determined according to the second row of drawing parameters, and then the second stripe is subjected to ashing treatment to find the edge of the second stripe. And then analyzing the point set vectors of the two edges of the second stripe by adopting a principal component analysis algorithm, fitting to obtain two edge lines, and determining the angle of the second stripe according to the edge lines of the second stripe. Similarly, the above method can be used when determining the stripe angle.
In the above embodiment of the present invention, before adjusting the lateral offset value of the second image in step S200, as shown in fig. 4, the method further includes:
s110, acquiring a second image with different color stripes;
s120, extracting the hue of the second image, and detecting boundary lines of different color stripes according to the hue;
s130, judging whether the central line of any stripe passes through the central point of the screen of the display module, if not, executing the step S140, otherwise, executing the step S150;
s140, adjusting a transverse offset value of the second image;
and S150, determining a transverse offset value of the second image.
Specifically, before adjusting the lateral offset value of the second image, the second image with different color stripes in the preset area needs to be obtained, where the second image may include a plurality of red and green stripes, or a combination of other colors. The present embodiment is illustrated with red and green stripes. In general, the second image here includes stripes of different colors, and if only stripes of a single color are present and the width of the stripes cannot be detected, the center of the stripes cannot be specified.
And then extracting the hue of the second image, and acquiring the saturation of the color in order to acquire more accurate stripes. And detecting the boundary of the red and green stripes according to the hue. And detecting whether the central line of any stripe passes through the central point of the screen of the display module, and when the central line of any stripe does not pass through the central point of the screen of the display module, adjusting the transverse deviation value of the second image.
After the horizontal offset value of the second image is adjusted, so that the center point of a stripe of the second image is located at the center point of the display module screen, and a third image is obtained, the stripe width of the third image needs to be adjusted, so that the stripe width is greater than or equal to the width of the display module screen.
When the width of the stripe is determined to be larger than or equal to the width of the screen of the display module, the detector can be used for determination. As shown in fig. 5:
s301, detecting pixels on a display image at fixed points;
s302, detecting the brightness value of the display image by using a detector, judging whether the maximum brightness value or the minimum brightness value of the display image is detected, and executing a step S304 when the maximum brightness value or the minimum brightness value of the display image is detected, or executing a step S303;
s303, changing pixels on the display image, and then executing S301 fixed point detection to pixels on the display image;
and S304, ending.
It should be noted that, when the width of the stripe is greater than or equal to the width of the display module screen, the CCD industrial camera can shoot a full screen image, if the stripe is a red-green stripe, the full screen image refers to that the full screen is a red image or a green image, and if the stripe is a black-white stripe, the full screen image refers to that the full screen is a black image or a white image.
When a black-and-white line chart is displayed, the luminance value of the display image at this time is tested using a detector. When the maximum luminance value or the minimum luminance value of the display image is detected, the pixel on the display image at that time is determined to be the optimal pixel. When black and white arrangement is displayed, when the full screen image is a black image, the minimum brightness value of the display image is detected, when the full screen image is a white image, the maximum brightness value of the display image is detected, and when full screen black or full screen white is displayed, the width of the stripe is larger than or equal to the width of the display module screen.
In the above embodiment of the present invention, as shown in fig. 6, step S400 includes:
s401, detecting the brightness value of the fourth image aiming at each transverse offset value in a period of the fourth image, and determining the minimum brightness value and the maximum brightness value;
s402, calculating a crosstalk value of the display module by utilizing a ratio of the minimum brightness value to the maximum brightness value or a ratio of the minimum brightness value to the maximum brightness value and a difference value of the minimum brightness value to the minimum brightness value so as to detect the 3D effect of the display module.
Specifically, detection needs to be performed on the fourth image so as to obtain two optimal spectroscopic effect maps. The present embodiment is illustrated in black and white line drawings. The brightness is measured and recorded using the detector for each lateral offset value during a cycle of the fourth image, over a cycle of lateral offset values. And selecting the minimum brightness value and the maximum brightness value as the original data for calculating the crosstalk.
It should be noted that the detector detects that the maximum brightness value is the best state of displaying the white image on the screen, and conversely, the detector detects that the minimum brightness value is the best state of displaying the black image on the screen.
And then calculating according to the ratio of the minimum brightness value to the maximum brightness value to obtain a display module crosstalk value, and further detecting the 3D effect of the display module according to the calculated display module crosstalk value.
Or performing subtraction operation on the maximum brightness value and the minimum brightness value to obtain a first difference value, then calculating the ratio of the minimum brightness value to the first difference value, calculating to obtain a crosstalk value of the display module, and then detecting the 3D effect of the display module according to the calculated crosstalk value of the display module.
As shown in fig. 7, the process of determining the maximum luminance value and the minimum luminance value is as follows:
s501, carrying out brightness detection on the fourth image;
s502, reading and storing the detected brightness value;
s503, judging whether the transverse deviation value is traversed for a period from the minimum value to the maximum value, if so, executing a step S504, otherwise, executing a step S502;
s504, selecting the maximum brightness value and the minimum brightness value, and executing the step S505;
and S505, ending the flow.
In the above-described embodiment of the present invention, as shown in fig. 8, step S400 includes:
s410, counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image processed according to the preset color mapping relation;
s420, calculating the ratio of the number of the secondary pixel points to the number of the primary pixel points aiming at any stripe to obtain a first crosstalk value;
s430, calculating an average value of the N first crosstalk values, and determining the crosstalk value of the display module to further detect the 3D effect of the display module.
Specifically, crosstalk calculation may be performed on the shot fourth image processed according to the preset color mapping relationship to detect the 3D effect of the display module, before calculation, a color mapping relationship between colors in the screen of the display module and the image shot on the screen of the display module needs to be established, and color restoration may be performed on the shot fourth image according to the color mapping relationship. There are a plurality of photographs taken of the fourth image.
Then, the number of primary pixel points and the number of secondary pixel points in the N stripes in the restored shot fourth image are counted, and the ratio of the number of the secondary pixel points to the number of the primary pixel points is calculated for any stripe to obtain a first crosstalk value. It should be noted that the width of any stripe is greater than or equal to the width of the screen of the display module, that is, when the fourth image is photographed by using a CCD industrial camera, the obtained image in the photograph is a stripe image.
For example, how the secondary pixel point and the primary pixel point are respectively defined is illustrated, specifically, all pixels in the white stripe can be transferred to the gray space, where the white pixel point is the primary pixel point and the pixel points of other colors are the secondary pixel points. When the first crosstalk value is calculated, the ratio of the number of the pixels of other colors to the white pixels is calculated.
Because the number of the stripes is not limited to one, when the number of the stripes is N, the ratio of the number of the secondary pixel points to the number of the main pixel points needs to be calculated for each stripe, then the average value of the N first crosstalk values is calculated, and the crosstalk value of the display module is determined so as to detect the 3D effect of the display module.
In the above embodiment of the present invention, when the detector is used to detect the brightness value of the fourth image, the height of the detector relative to the display module screen can be adjusted, and further, the crosstalk value of the display module in the space can be calculated.
As shown in fig. 9, a schematic view of an overall process of calculating the crosstalk value of the display module according to the embodiment of the present invention is as follows:
s601, acquiring a first image of a display stripe image of a display module, calculating a grating joint angle of the first image, and determining a layout angle corresponding to the grating joint angle;
s602, determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to enable a stripe center point of the second image to be located at a center point of a display module screen to obtain a third image;
s603, adjusting the stripe width of the third image by adjusting the display pixels, so that the stripe width is larger than or equal to the width of a display module screen, and obtaining a fourth image;
s604, determining the maximum brightness value and the minimum brightness value of the fourth image obtained by the detector under the lateral offset value of one period;
s605, calculating a crosstalk value of the display module according to the maximum brightness value and the minimum brightness value;
and S606, ending the flow.
As shown in fig. 10, a schematic diagram of an overall process of calculating the crosstalk value of the display module according to the embodiment of the present invention is shown as follows:
s701, establishing a color mapping relation between colors in a display module screen and images shot by the display module screen;
s702, acquiring a first image of a display stripe image of a display module, calculating a grating joint angle of the first image, and determining a layout angle corresponding to the grating joint angle;
s703, determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to enable a stripe central point of the second image to be located at a central point of a display module screen to obtain a third image;
s704, adjusting the stripe width of the third image by adjusting the display pixels to enable the stripe width to be larger than or equal to the width of a display module screen to obtain a fourth image;
s705, performing color restoration on the shot fourth image according to the color mapping relation;
s706, counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image after color restoration;
s707, calculating the ratio of the number of secondary pixel points to the number of primary pixel points for any stripe to obtain a first crosstalk value;
s708, calculating an average value of the N first crosstalk values, and determining the crosstalk value of the display module to further detect the 3D effect of the display module.
An embodiment of the present invention further provides a device for detecting a 3D effect of a display module, as shown in fig. 11, including:
an obtaining and processing module 10, configured to obtain a first image of a display stripe pattern of a display module, calculate a grating attachment angle of the first image, and determine a layout angle corresponding to the grating attachment angle
The determining and adjusting module 20 is configured to determine that the image with the layout angle attribute is a second image, and adjust a lateral offset value of the second image so that a stripe center point of the second image is located at a center point of a display module screen to obtain a third image;
the adjustment obtaining module 30 is configured to adjust a stripe width of the third image by adjusting the display pixels, so that the stripe width is greater than or equal to a width of a display module screen, and a fourth image is obtained;
the calculation detection module 40 is configured to determine a maximum brightness value and a minimum brightness value obtained by detecting the fourth image under a periodic lateral offset value, and calculate a crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect a 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
As shown in fig. 12, the acquisition processing module 10 includes:
the first recording submodule 11 is configured to determine a first streak angle of the first image according to the first ranking parameter, and record the first streak angle and the first ranking parameter;
the second recording submodule 12 is configured to change the first layout parameter to a second layout parameter, determine a second streak angle of the first image according to the second layout parameter, and record the second streak angle and the second layout parameter;
the third recording submodule 13 is configured to change the second layout parameter to a third layout parameter, determine a third stripe angle, and record the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and the calculating submodule 14 is configured to calculate a grating attachment angle according to a preset number of fringe angles, layout parameters and a relationship between the preset number of fringe angles and the layout parameters, where the first layout parameter is a default layout parameter.
Wherein, the first recording sub-module 11 includes:
a first determining unit 111, configured to determine a distribution direction of a first stripe of the first image according to the first ranking parameter;
the searching unit 112 is configured to graying the first stripe and find the edge of the first stripe;
a second determining unit 113, configured to analyze an edge point set vector of the first stripe by using a principal component analysis algorithm, and determine an edge line of the first stripe according to a point set fitting edge straight line;
a third determining unit 114, configured to determine an angle of the first stripe according to an edge line of the first stripe.
Wherein, the device still includes:
an obtaining module 50, configured to obtain the second image with stripes of different colors before determining that the adjusting module 20 adjusts the lateral offset value of the second image;
an extraction detection module 60, configured to extract a hue of the second image, and detect boundaries of different color stripes according to the hue;
the judging module 70 is used for judging whether the central line of any stripe passes through the central point of the display module screen;
and a driving module 80, configured to drive the determination adjusting module to adjust the lateral offset value of the second image when the determination result is negative.
Wherein, the calculation detection module 40 includes:
a detection determining sub-module 41, configured to detect, for each lateral offset value in a cycle of the fourth image, a luminance value of the fourth image, and determine a minimum luminance value and a maximum luminance value;
the first calculation and detection sub-module 42 is configured to calculate a crosstalk value of the display module by using a ratio of the minimum brightness value to the maximum brightness value or a ratio of the minimum brightness value to the maximum brightness value and a difference value of the minimum brightness value, so as to detect a 3D effect of the display module.
Wherein, the calculation detection module 40 includes:
the counting submodule 43 is configured to count the number of primary pixel points and the number of secondary pixel points in the N stripes in the photographed fourth image processed according to the preset color mapping relationship;
the calculation obtaining submodule 44 is configured to calculate, for any stripe, a ratio of the number of secondary pixel points to the number of primary pixel points, and obtain a first crosstalk value;
and the second calculation detection submodule 45 is configured to calculate an average value of the N first crosstalk values, determine a crosstalk value of the display module, and then detect a 3D effect of the display module.
Wherein, the device still includes:
the establishing module 90 is configured to establish a color mapping relationship between colors in a screen of the display module and images obtained after the screen of the display module is shot before the crosstalk calculation is performed on the shot fourth images processed according to the preset color mapping relationship by the calculation and detection module 40 to detect the 3D effect of the display module;
and the restoring module 100 is configured to perform color restoration on the shot fourth image according to the color mapping relationship.
Wherein, the device still includes:
the detecting and calculating module 110 is configured to detect brightness values of the fourth image at different heights to calculate a crosstalk value of the display module in the space.
An embodiment of the present invention further provides a 3D effect detection system for a display module, as shown in fig. 13, including:
an equipment chassis, the equipment chassis comprising: the display module is arranged on the lighting board and connected with the lighting board; the CCD industrial camera is positioned right above the display module, and the detector is positioned on the same horizontal line with the CCD industrial camera and used for detecting the brightness; and
and the PC is connected with the equipment case and is respectively connected with the detector, the CCD industrial camera and the spot lamp panel.
Specifically, a CCD industrial camera is placed right above a screen of a display module; the detector is placed on the same horizontal line with the CCD industrial camera, namely the height of the CCD industrial camera and the height of the display module are the same as the height of the detector and the display module. The PC is connected with the detector, the camera and the lighting board. During testing, the display module is placed on the lighting board clamping groove, the lighting board is connected, and the software can be started to run to test by clicking.
If the crosstalk of the display module is detected in space, a dynamic sliding rail needs to be added on the CCD industrial camera and the detector, so that the distance from the CCD industrial camera and the detector to the module can be adjusted.
It should be noted that the detector herein may be an illuminometer, or other instrument for detecting brightness, and it is only necessary to ensure that the selected instrument is not affected by color temperature and can be connected to a PC.
According to the embodiment of the invention, after a first image of a stripe image displayed by a display module is obtained, a grating attaching angle of the first image is calculated, a diagram arranging angle corresponding to the grating attaching angle is determined, a second image is determined according to the diagram arranging angle, a transverse offset value of the second image is adjusted, a third image with a stripe central point positioned at the central point of a screen of the display module is obtained, the stripe width of the third image is adjusted, a fourth image with the stripe width larger than or equal to the width of the screen of the display module is obtained, then brightness detection is carried out on the fourth image, a display module crosstalk value is calculated according to a detection result or display module crosstalk calculation is carried out on a picture of the fourth image processed according to a preset color mapping relation, and a 3D effect of the display module is detected according to the calculated display module crosstalk result. The embodiment of the invention can simply and quickly detect the 3D effect of the display module and obtain a stable and reliable crosstalk result so as to further obtain a stable and reliable 3D effect detection result, thereby avoiding the problems that the 3D effect of the module is difficult to be simply and quickly detected when a 3D mobile phone is produced, and the crosstalk result is different due to different numbers and positions of stripes in the detection process.
It should be noted that the 3D effect detection apparatus and system of the display module according to the embodiments of the present invention are apparatuses and systems using the above method, and all embodiments of the above method are applicable to the apparatuses and systems and can achieve the same or similar beneficial effects.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (17)
1. A3D effect detection method of a display module is characterized by comprising the following steps:
acquiring a first image of a display module for displaying a fringe pattern, calculating a grating joint angle of the first image, and determining a pattern arrangement angle corresponding to the grating joint angle;
determining the image with the layout angle attribute as a second image, and adjusting a transverse offset value of the second image to enable a stripe central point of the second image to be located at a central point of a display module screen to obtain a third image;
adjusting the stripe width of the third image by adjusting the display pixels, so that the stripe width is larger than or equal to the width of a display module screen, and obtaining a fourth image;
determining the maximum brightness value and the minimum brightness value of the fourth image obtained by detection in a period of the horizontal deviation value, and calculating a crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
2. The method of claim 1, wherein the calculating the raster fit angle for the first image comprises:
determining a first stripe angle of the first image according to a first row diagram parameter, and recording the first stripe angle and the first row diagram parameter;
changing the first layout parameter into a second layout parameter, determining a second stripe angle of the first image according to the second layout parameter, and recording the second stripe angle and the second layout parameter;
changing the second layout parameter into a third layout parameter, determining a third stripe angle and recording the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and calculating the grating attaching angle according to the preset number of fringe angles, the layout parameters and the relationship among the fringe angles, the layout parameters and the layout parameters, wherein the first layout parameter is a default layout parameter.
3. The method of claim 2, wherein determining the first streak angle for the first image from the first swath parameter comprises:
determining the distribution direction of a first stripe of the first image according to the first arrangement parameter;
graying the first stripe and finding the edge of the first stripe;
analyzing the edge point set vector of the first stripe by using a principal component analysis algorithm, and fitting an edge straight line according to the point set to determine an edge line of the first stripe;
and determining the angle of the first stripe according to the edge line of the first stripe.
4. The method of claim 1, wherein prior to said adjusting the lateral offset value of the second image, the method further comprises:
acquiring a second image with stripes of different colors;
extracting the hue of the second image, and detecting boundary lines of different color stripes according to the hue;
judging whether the central line of any stripe passes through the central point of the screen of the display module;
and when the judgment result is negative, adjusting the transverse offset value of the second image.
5. The method of claim 1, wherein determining a maximum brightness value and a minimum brightness value of the fourth image detected at a period of the horizontal offset value, and calculating a display module crosstalk value according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module comprises:
detecting the brightness value of the fourth image for each horizontal deviation value in the fourth image period, and determining the minimum brightness value and the maximum brightness value;
and calculating the crosstalk value of the display module by utilizing the ratio of the minimum brightness value to the maximum brightness value or the ratio of the minimum brightness value to the maximum brightness value and the difference value of the minimum brightness value to the minimum brightness value so as to detect the 3D effect of the display module.
6. The method of claim 1, wherein the performing crosstalk calculation on the photographed fourth image processed according to the preset color mapping relationship to detect the 3D effect of the display module comprises:
counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image processed according to the preset color mapping relation;
aiming at any stripe, calculating the ratio of the number of secondary pixel points to the number of primary pixel points to obtain a first crosstalk value;
and calculating the average value of the N first crosstalk values, and determining the crosstalk value of the display module so as to detect the 3D effect of the display module.
7. The method of claim 6, wherein before performing crosstalk calculation on the photographed fourth image processed according to the preset color mapping relationship to detect the 3D effect of the display module, the method further comprises:
establishing a color mapping relation between colors in a screen of a display module and images shot by the screen of the display module;
and performing color restoration on the shot fourth image according to the color mapping relation.
8. The method of claim 1, wherein the method further comprises:
and detecting the brightness values of the fourth image at different heights to calculate the crosstalk value of the display module in the space.
9. The utility model provides a display module's 3D effect detection device which characterized in that includes:
the acquisition processing module is used for acquiring a first image of a display stripe image of a display module, calculating a grating joint angle of the first image, and determining a layout angle corresponding to the grating joint angle
The determining and adjusting module is used for determining that the image with the layout angle attribute is a second image, and adjusting a transverse offset value of the second image to enable a stripe center point of the second image to be located at a center point of a display module screen to obtain a third image;
the adjustment acquisition module is used for adjusting the stripe width of the third image by adjusting the display pixels, so that the stripe width is larger than or equal to the width of a display module screen to obtain a fourth image;
the calculation detection module is used for determining the maximum brightness value and the minimum brightness value obtained by detecting the fourth image under a periodic horizontal deviation value, and calculating the crosstalk value of the display module according to the maximum brightness value and the minimum brightness value to detect the 3D effect of the display module; or carrying out crosstalk calculation on the shot fourth image processed according to the preset color mapping relation to detect the 3D effect of the display module.
10. The apparatus of claim 9, wherein the acquisition processing module comprises:
the first recording submodule is used for determining a first streak angle of the first image according to a first streak parameter and recording the first streak angle and the first streak parameter;
the second recording submodule is used for changing the first chart arrangement parameter into a second chart arrangement parameter, determining a second stripe angle of the first image according to the second chart arrangement parameter, and recording the second stripe angle and the second chart arrangement parameter;
the third recording submodule is used for changing the second layout parameter into a third layout parameter, determining a third stripe angle and recording the third stripe angle and the third layout parameter until a preset number of stripe angles and layout parameters are obtained;
and the calculation submodule is used for calculating the grating fitting angle according to the preset number of fringe angles, the layout parameters and the relationship among the preset number of the layout parameters, wherein the first layout parameter is a default layout parameter.
11. The apparatus of claim 10, wherein the first record submodule comprises:
a first determining unit, configured to determine a distribution direction of a first stripe of the first image according to the first ranking parameter;
the searching unit is used for graying the first stripe and searching the edge of the first stripe;
the second determining unit is used for analyzing the edge point set vector of the first stripe by utilizing a principal component analysis algorithm and determining the edge line of the first stripe according to the point set fitting edge straight line;
and the third determining unit is used for determining the angle of the first stripe according to the edge line of the first stripe.
12. The apparatus of claim 9, the apparatus further comprising:
an obtaining module, configured to obtain a second image with stripes of different colors before the determining and adjusting module adjusts the lateral offset value of the second image;
the extraction detection module is used for extracting the hue of the second image and detecting the boundary of different color stripes according to the hue;
the judging module is used for judging whether the central line of any stripe passes through the central point of the screen of the display module;
and the driving module is used for driving the determining and adjusting module to adjust the transverse offset value of the second image when the judgment result is negative.
13. The apparatus of claim 9, wherein the calculation detection module comprises:
a detection determining sub-module, configured to detect, for each lateral offset value in a cycle of the fourth image, a luminance value of the fourth image, and determine a minimum luminance value and a maximum luminance value;
and the first calculation and detection submodule is used for calculating the crosstalk value of the display module by utilizing the ratio of the minimum brightness value to the maximum brightness value or the ratio of the minimum brightness value to the maximum brightness value and the minimum brightness value difference value so as to detect the 3D effect of the display module.
14. The apparatus of claim 9, wherein the calculation detection module comprises:
the counting submodule is used for counting the number of primary pixel points and the number of secondary pixel points in the N stripes in the shot fourth image processed according to the preset color mapping relation;
the calculation acquisition submodule is used for calculating the ratio of the number of the secondary pixel points to the number of the primary pixel points aiming at any stripe to acquire a first crosstalk value;
and the second calculation detection submodule is used for calculating the average value of the N first crosstalk values, determining the crosstalk value of the display module and further detecting the 3D effect of the display module.
15. The apparatus of claim 14, wherein the apparatus further comprises:
the establishing module is used for establishing a color mapping relation between colors in a screen of the display module and images shot by the screen of the display module before the calculation and detection module carries out crosstalk calculation on the shot fourth images processed according to the preset color mapping relation to detect the 3D effect of the display module;
and the restoring module is used for carrying out color restoration on the shot fourth image according to the color mapping relation.
16. The apparatus of claim 9, wherein the apparatus further comprises:
and the detection calculation module is used for detecting the brightness value of the fourth image at different heights to calculate the crosstalk value of the display module in the space.
17. The utility model provides a 3D effect detecting system of display module assembly which characterized in that includes:
an equipment chassis, the equipment chassis comprising: the lighting panel and the display module are arranged on the lighting panel and connected with the lighting panel; the CCD industrial camera is positioned right above the display module, and the detector is positioned on the same horizontal line with the CCD industrial camera and used for detecting the brightness; and
the PC is connected with the equipment case and is respectively connected with the detector, the CCD industrial camera and the lighting board;
wherein the PC has stored thereon a software program which, when executed, implements the steps of the 3D effect detection method of the display module according to any one of claims 1 to 8.
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| CN112102292A (en) * | 2020-09-16 | 2020-12-18 | 深圳超多维科技有限公司 | Method, device and equipment for detecting laminating precision of 3D image |
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| CN202025132U (en) * | 2011-03-28 | 2011-11-02 | 京东方科技集团股份有限公司 | Wide view film stereo display device |
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