CN107633806B - Shading correction processing method for LED display device - Google Patents
Shading correction processing method for LED display device Download PDFInfo
- Publication number
- CN107633806B CN107633806B CN201610560776.8A CN201610560776A CN107633806B CN 107633806 B CN107633806 B CN 107633806B CN 201610560776 A CN201610560776 A CN 201610560776A CN 107633806 B CN107633806 B CN 107633806B
- Authority
- CN
- China
- Prior art keywords
- point
- led lamp
- shielding
- points
- lamp point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a shading correction processing method of an LED display device, which comprises the following steps: acquiring shielding original scores of all the LED lamp points based on the lamp point acquisition data of the target display area; detecting shielded edge points in each LED lamp point based on the lamp point acquisition data to obtain a shielded edge point detection result; combining the shielding original scores and the shielding edge point detection results of the LED lamp points to obtain shielding correction scores of the LED lamp points; detecting shielded lamp points in each LED lamp point according to the shielded correction score to obtain a shielded lamp point detection result; and (e) traversing the detection result of the shielded lamp points of each LED lamp point by point, and correcting the lamp point acquisition data of the current LED lamp point by using the lamp point acquisition data of the neighborhood LED lamp points of the current LED lamp point, which are non-shielded lamp points, when the current LED lamp point is the shielded lamp point. Therefore, the invention can conveniently and quickly process the complex shielding situation, is not influenced by the gradient of the lamp point collected data and can ensure the effect of shielding the edge position of the object.
Description
Technical Field
The invention relates to the technical field of LED display correction, in particular to a shading correction processing method of an LED display device.
Background
In recent years, with the wide application of area array CCD cameras and the rapid development of computer technology, the LED display screen point-by-point correction industry is unprecedented technical support, so that the uniformity and consistency of the LED display screen brightness and chromaticity point-by-point correction effect are improved to a great extent. In addition, the work efficiency, the correction precision and the stability of the related point-by-point correction product are improved to different degrees, so that the LED display screen correction method is popular with manufacturers and users of LED display screens, but special conditions and problems can still occur in some actual correction fields, for example, the phenomena that wires pass through or branches are shielded in front of the LED display screens and the like. No matter how the engineer selects the machine position (camera acquisition angle) in the correction process, the shielding can not be avoided, so that the point-by-point correction can not acquire the lighting chromaticity value of the LED lamp in the shielding area, for the shielded acquisition data, the maximum characteristic is that the amplitude of the lamp point in the shielding area is very different from the amplitude of the lamp point in the normal acquisition, the curved surface correction of the acquired data has large deviation possibly, the abnormal patch with poor transition is reflected to the final screen body correction effect, namely the shielding position, and the phenomenon can seriously influence the viewing effect of a user on the LED display screen and can not be accepted by the point-by-point correction.
For the shielded acquisition data, the shielded defect lamp point can be detected by calculating the overall average value of the acquisition data and then setting a shielded defect detection threshold (the overall average value percentage); and then the shielded defect lamp points are directly replaced by the integral average value, so that the amplitude difference between the defect lamp points and the normally collected lamp points is eliminated. However, 1) if the collected data with occlusion itself has a large gradient (essentially generated by the camera view angle, and characterized by small amplitudes around, large amplitude in the middle, small amplitude on the left, large amplitude on the right, etc.), the overall average percentage threshold of the above-mentioned defective lamp point processing method will directly fail; and 2) the overall average percentage threshold of the defective lamp point processing method has poor processing effect on the condition that the edge position of the shielding object only shields half or all of the LED lamp points, and reflects that a circle of obviously abnormal lamp points appear on the edge profile of the shielding object in the final correction effect.
Disclosure of Invention
Therefore, based on the problem of shading correction of the LED display screen in the prior art, the invention provides a method for shading correction processing of an LED display device, which can solve the problem of abnormal patches in the shading correction of the LED display device to a certain extent, so that the uniformity and consistency of point-by-point correction based on an image acquisition device such as an area array camera are improved, and the requirements of wider users are met.
Specifically, the method for correcting and processing the shielding of the LED display device according to the embodiment of the present invention includes the steps of: (a) acquiring shielding original scores of all LED lamp points based on lamp point acquisition data of a target display area of the LED display device; (b) detecting shielded edge points in each LED lamp point based on the lamp point acquisition data to obtain a shielded edge point detection result of each LED lamp point; (c) combining the shielding original scores and the shielding edge point detection results of the LED lamp points to obtain shielding correction scores of the LED lamp points; (d) detecting shielded lamp points in each LED lamp point according to the shielded correction score of each LED lamp point to obtain a shielded lamp point detection result of each LED lamp point; and (e) traversing the detection result of the shielded lamp points of each LED lamp point by point, and updating the lamp point acquisition data of the current LED lamp point by using the lamp point acquisition data of the neighborhood LED lamp points of the current LED lamp point, which are non-shielded lamp points, when the current LED lamp point is the shielded lamp point.
In one embodiment of the present invention, step (a) comprises: (a1) calculating the ratio of the lamp point brightness data of each LED lamp point in the target display area to the average value of the lamp point brightness data of the target display area; and (a2) segmenting the ratio of each LED lamp point and obtaining the shielding original score of each LED lamp point by utilizing a segmentation function.
In one embodiment of the present invention, the piecewise function in step (a2) is:
wherein ratio (i, j) represents the ratio of the LED lamp points with coordinate position (i, j), and originScore (i, j) represents the occlusion primitive score of the LED lamp points with coordinate position (i, j).
In one embodiment of the present invention, step (b) comprises: (b1) calculating the gradient value of each LED lamp point by using an edge detection operator according to the lamp point acquisition data; and (b2) judging whether the gradient value of each LED lamp point is larger than a set threshold value one by one to determine whether the LED lamp point is a shielding edge point, thereby obtaining a shielding edge point detection result of each LED lamp point.
In one embodiment of the present invention, step (c) comprises: (c1) traversing the detection result of the shielding edge point of each LED lamp point, and calculating the minimum distance from each LED lamp point to the shielding edge point; and (c2) segmenting the minimum distance of each LED lamp point and combining the occlusion raw score with a segmentation function to obtain the occlusion corrected score for each LED lamp point.
In one embodiment of the present invention, step (c1) includes: starting to traverse the detection result of the shielding edge point of the current LED lamp point by using a traverse template with a preset size, and when the shielding edge point does not exist in the traverse template with the preset size, automatically increasing preset values of rows and columns of the traverse template to obtain a new traverse template and searching the shielding edge point in the new traverse template.
In one embodiment of the present invention, the piecewise function in step (c2) is:
wherein originScore (i, j) represents the occlusion raw score of an LED lamp point with coordinate position (i, j), d (i, j) represents the minimum distance of an LED lamp point with coordinate position (i, j), and amendsscore (i, j) represents the occlusion correction score of an LED lamp point with coordinate position (i, j).
In one embodiment of the present invention, step (d) comprises: and judging whether the shielding correction score of each LED lamp point is larger than a set threshold value one by one, if so, judging that the current LED lamp point is a shielding lamp point and giving a first mark, otherwise, judging that the current LED lamp point is a non-shielding lamp point and giving a second mark, and thus, obtaining the shielding lamp point detection result of each LED lamp point.
In one embodiment of the present invention, step (e) comprises: (e1) if the detection result of the shielded lamp points indicates that the LED lamp points traversed at present are shielded lamp points, counting the number of non-shielded lamp points in a template with a preset size and with the LED lamp points traversed at present as the center; and (e2) when the counted number of the non-shielding lamp points meets the preset condition, replacing the lamp point collected data of the currently traversed LED lamp point with the counted average value of the lamp point collected data of each non-shielding lamp point.
In one embodiment of the present invention, step (e) further comprises: (e3) and when the counted number of the non-shielding lamp points does not meet the preset condition, automatically increasing the row and column of the preset size template by preset values to obtain an increased size template, and counting the number of the non-shielding lamp points in the increased size template.
As can be seen from the above, the method for processing shading correction of an LED display device according to the embodiment of the present invention can achieve the following beneficial effects: 1) any correction site can conveniently and quickly process the complex shielding situation; and 2) the gradient influence of the lamp point collected data is avoided, and the effect of shielding the edge position of the object can be ensured.
Other aspects and features of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
Drawings
The following detailed description of embodiments of the invention will be made with reference to the accompanying drawings.
Fig. 1A and 1B are comparison effect graphs before and after shading correction processing is performed on the lamp point brightness data of the target display area of the LED display device according to the embodiment of the invention.
Fig. 2 is a flowchart of a shading correction processing method for an LED display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
The embodiment of the invention provides a method for processing the shielding correction of an LED display device, aiming at the problem of poor processing effect of abnormal patches or edge outlines of shielding objects in the shielding correction of an LED display screen in the prior art.
Specifically, the embodiment of the present invention provides a method for correcting and processing shielding of an LED display device, where the LED display device is, for example, an LED display screen, an LED box, or even an LED lamp panel, and the specific implementation manner is as follows:
(i) acquiring shielding original scores of all LED lamp points based on collected lamp point brightness data
The method comprises the following steps of carrying out monochrome image collection on each LED lamp point of a target display area (which can be the whole display area of the LED display device or a local display area) of the LED display device to obtain lamp point brightness data, and calculating the ratio of the lamp point brightness data of each LED lamp point of the target display area to an average value point by point, wherein the ratio is specifically as follows:
the method comprises the steps that lum (i, j) represents lamp brightness data of LED lamp points with (i, j) coordinate positions in a target display area, average represents the average value of the lamp brightness data of all the LED lamp points in the target display area, and ratio (i, j) represents the ratio of the lamp brightness data of the LED lamp points with (i, j) coordinate positions relative to the average value;
then, the ratio (i, j) of the lamp point brightness data of each LED lamp point relative to the average value is combined, and the shielding original score of each LED lamp point is calculated point by using the following formula:
wherein, ratio (i, j) represents the ratio of the lamp brightness data of the LED lamp point with the coordinate position (i, j) relative to the average value, and originScore (i, j) represents the shielding original score of the LED lamp point with the coordinate position (i, j); here, the higher the occlusion score, the greater the probability that the current light point is culled. It should be noted that the segmentation points in the segmentation function for calculating the occlusion raw score are not limited to 0.25, 1, and 1.75 in the formula, which is merely an example and is not intended to limit the present invention.
(ii) Shielding edge points in each LED lamp point based on collected lamp point brightness data
The purpose of edge detection is to extract the edge position of an occluded object, and there are many commonly used detection operators such as Roberts operator, Sobel operator, Prewitt operator, Laplace operator, Log operator, Canny operator, and the like, in this embodiment, Sobel operator is selected for edge detection, and the horizontal and vertical convolution factors of Sobel operator are as follows:
wherein G isxAnd GyRepresenting the horizontal and vertical convolution factors;
then, traversing the brightness data of the lamp point by point through a 3-by-3 convolution template, and then calculating the gradient value of the brightness data of the current lamp point as shown in the following formula:
wherein, G represents the current light point brightness gradient value, and L represents the 3 × 3 light point brightness data in the currently traversed 3 × 3 template.
Next, when the brightness gradient value G is greater than the threshold (the threshold may be set empirically or by other adaptive algorithms), it is determined that the current LED light point is a blocked edge point and is collocated with 1 as a blocked edge point detection result, otherwise, it is determined that the current LED light point is not a blocked edge point and is collocated with 0 as a blocked edge point detection result.
(iii) Correcting the shielding original score by combining the collected lamp point brightness data and the shielding edge point detection result
Calculating the minimum distance between each LED lamp point and the position of the shielding edge point, specifically initializing the minimum distance value into a maximum distance constant k set by experience, traversing the shielding edge point detection result data from the 3 × 3 size template, and judging as follows:
1) if shielding edge points exist in the 3 x 3 size template and the distance between the current LED lamp point and the shielding edge points is smaller than the current minimum distance value, updating the minimum distance value;
2) if no shielding edge point exists in the 3 x 3 size template, continuously and circularly traversing the size row and column auto-increment preset values, such as 1, of the template, and ending when the auto-increment values exceed k;
3) repeating the steps until each LED lamp point calculates the minimum distance value;
then, the original shielding score and the minimum distance value of each LED lamp point are combined to calculate the shielding correction score of each LED lamp point, which is shown as the following formula:
wherein originScore (i, j) represents the shielding original score of the LED lamp point with the coordinate position (i, j), d (i, j) represents the minimum distance value between the LED lamp point with the coordinate position (i, j) and the shielding edge point, and amendsscore (i, j) represents the shielding correction score of the LED lamp point with the coordinate position (i, j). It should be noted that the segmentation points in the segmentation function for calculating the occlusion raw score are not limited to 0 to 6 in the formula, which is only an example and is not intended to limit the present invention.
(iv) Detecting shielded light points among the LED light points according to the shielded correction score
And (3) point-by-point traversal judgment: when the occlusion correction score amendsscore (i, j) is greater than the threshold (where the threshold is an empirically set constant within 0 to 100, for example, 50 is selected in this embodiment), it is determined that the current LED lamp point is an occluded lamp point and 1 is juxtaposed (i.e., marked as 1) as the occluded lamp point detection result, and conversely, it is determined that the normal LED lamp point (i.e., a non-occluded lamp point) is juxtaposed 0 (i.e., marked as 0) as the occluded lamp point detection result.
(v) Correcting lamp point brightness data for a current LED lamp point that is a shielded lamp point using lamp point brightness data for a neighbor LED lamp point that is a non-shielded lamp point
Traversing the lamp point brightness data and the shielded lamp point detection result of each LED lamp point by point, and judging as follows:
1) if the detection result of the shielded lamp points of the current LED lamp points is 1, counting the number of non-shielded lamp points in the template with a certain size (for example, more than 5) by taking the current LED lamp points as the center of the template, and if the number of the non-shielded lamp points reaches a certain required amount (for example, 10 or more), calculating the average value of the lamp point brightness data of the non-shielded lamp points and replacing the lamp point brightness data of the current LED lamp points; if the number is not enough, continuously and circularly traversing the self-increment preset values of the rows and the columns of the template with a certain size, such as 1;
2) if the shielding judgment result of the current LED lamp point is 0, directly skipping;
3) the loop is traversed until the lamp brightness data of each LED lamp is accessed or processed; and finishing the shading correction processing of the LED display device.
Referring to fig. 1A and fig. 1B, there are shown comparison effect graphs before and after shading correction processing is performed on the brightness data of the lamp point in the target display area of the LED display device according to the embodiment of the invention. Specifically, fig. 1A is a luminance distribution diagram before the occlusion correction processing, which can clearly see the outline of the occluding object; fig. 1B is a luminance distribution diagram after the shading correction processing method according to the embodiment of the present invention is performed, and it is obvious that the luminance of the lamp point position where the shading object is located is effectively corrected.
In addition, it is worth mentioning that the foregoing embodiment of the present invention considers that the efficiency is only corrected for the collected lamp point luminance data to solve the defect problem of shading correction, but the present invention is not limited thereto, and certainly, the collected lamp point chrominance data may also be corrected; as is well known, the lamp chromaticity data is typically represented by two components in the color space, and therefore, in the process of correcting the collected lamp chromaticity data, a process similar to the lamp luminance data needs to be performed on each chromaticity component data. Further, for convenience of description, collected lamp luminance data and lamp chromaticity data are collectively referred to herein as lamp collected data; in this way, the method for processing shading correction of an LED display device according to the embodiment of the present invention can be summarized as the flowchart shown in fig. 2, and specific details can refer to the foregoing description, which is not repeated herein.
In summary, the method for processing shading correction of an LED display device according to the embodiments of the present invention can achieve the following advantages: 1) any correction site can conveniently and quickly process the complex shielding situation; and 2) the gradient influence of the lamp point collected data is avoided, and the effect of shielding the edge position of the object can be ensured.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A shading correction processing method of an LED display device is characterized by comprising the following steps:
(a) acquiring shielding original scores of all LED lamp points based on lamp point acquisition data of a target display area of the LED display device;
(b) detecting shielded edge points in each LED lamp point based on the lamp point acquisition data to obtain a shielded edge point detection result of each LED lamp point;
(c) combining the shielding original scores and the shielding edge point detection results of the LED lamp points to obtain shielding correction scores of the LED lamp points;
(d) detecting shielded lamp points in each LED lamp point according to the shielded correction score of each LED lamp point to obtain a shielded lamp point detection result of each LED lamp point; and
(e) traversing the detection results of the shielded lamp points of the LED lamp points point by point, and correcting the lamp point acquisition data of the currently traversed LED lamp points by using the lamp point acquisition data of the neighborhood LED lamp points of the currently traversed LED lamp points, which are non-shielded lamp points, when the currently traversed LED lamp points are shielded lamp points;
wherein step (c) comprises:
(c1) traversing the detection result of the shielding edge point of each LED lamp point, and calculating the minimum distance from each LED lamp point to the shielding edge point; and
(c2) and segmenting the minimum distance of each LED lamp point and combining the occlusion original score by utilizing a segmentation function to obtain the occlusion correction score of each LED lamp point.
2. The LED display device shading correction processing method according to claim 1, wherein the step (a) includes:
(a1) calculating the ratio of the lamp point brightness data of each LED lamp point in the target display area to the average value of the lamp point brightness data of the target display area; and
(a2) and segmenting the ratio of each LED lamp point and obtaining the shielding original score of each LED lamp point by utilizing a segmentation function.
3. The LED display device shading correction processing method according to claim 2, wherein the piecewise function in step (a2) is:
wherein ratio (i, j) represents the ratio of the LED lamp points with coordinate position (i, j), and originScore (i, j) represents the occlusion primitive score of the LED lamp points with coordinate position (i, j).
4. The LED display device shading correction processing method according to claim 1, wherein the step (b) includes:
(b1) calculating the gradient value of each LED lamp point by using an edge detection operator according to the lamp point acquisition data; and
(b2) and judging whether the gradient value of each LED lamp point is larger than a set threshold value one by one to determine whether the LED lamp point is a shielding edge point, so as to obtain a shielding edge point detection result of each LED lamp point.
5. The LED display device shading correction processing method according to claim 1, wherein the step (c1) includes:
starting to traverse the detection result of the shielding edge point of the current LED lamp point by using a traverse template with a preset size, and when the shielding edge point does not exist in the traverse template with the preset size, automatically increasing preset values of rows and columns of the traverse template to obtain a new traverse template and searching the shielding edge point in the new traverse template.
6. The LED display device shading correction processing method according to claim 1, wherein the piecewise function in step (c2) is:
wherein originScore (i, j) represents the occlusion raw score of an LED lamp point with coordinate position (i, j), d (i, j) represents the minimum distance of an LED lamp point with coordinate position (i, j), and amendsscore (i, j) represents the occlusion correction score of an LED lamp point with coordinate position (i, j).
7. The LED display device shading correction processing method according to claim 1, wherein the step (d) includes:
and judging whether the shielding correction score of each LED lamp point is larger than a set threshold value one by one, if so, judging that the current LED lamp point is a shielding lamp point and giving a first mark, otherwise, judging that the current LED lamp point is a non-shielding lamp point and giving a second mark, and thus, obtaining the shielding lamp point detection result of each LED lamp point.
8. The LED display device shading correction processing method according to claim 1, wherein the step (e) includes:
(e1) if the detection result of the shielded lamp points indicates that the LED lamp points traversed at present are shielded lamp points, counting the number of non-shielded lamp points in a template with a preset size and with the LED lamp points traversed at present as the center; and
(e2) and when the counted number of the non-shielding lamp points meets the preset condition, replacing the lamp point acquisition data of the currently traversed LED lamp point by the counted average value of the lamp point acquisition data of each non-shielding lamp point.
9. The LED display device shading correction processing method of claim 8, wherein step (e) further comprises:
(e3) and when the counted number of the non-shielding lamp points does not meet the preset condition, automatically increasing the row and column of the preset size template by preset values to obtain an increased size template, and counting the number of the non-shielding lamp points in the increased size template.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610560776.8A CN107633806B (en) | 2016-07-15 | 2016-07-15 | Shading correction processing method for LED display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610560776.8A CN107633806B (en) | 2016-07-15 | 2016-07-15 | Shading correction processing method for LED display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107633806A CN107633806A (en) | 2018-01-26 |
| CN107633806B true CN107633806B (en) | 2019-12-24 |
Family
ID=61112690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610560776.8A Active CN107633806B (en) | 2016-07-15 | 2016-07-15 | Shading correction processing method for LED display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107633806B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114241959B (en) * | 2021-11-18 | 2024-05-14 | 浙江大华技术股份有限公司 | Abnormal lamp spot detection method, display device and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377450A (en) * | 2008-09-19 | 2009-03-04 | 北京巨数数字技术开发有限公司 | System and method for extracting lightness data of display screen dot matrix |
| CN102723054A (en) * | 2012-06-18 | 2012-10-10 | 西安电子科技大学 | Online calibration system and online calibration method for ununiformity of LED (light-emitting diode) display screen |
| CN104900178A (en) * | 2015-06-18 | 2015-09-09 | 西安诺瓦电子科技有限公司 | Method for detecting images with brightness abnormality and LED display screen uniformity correction method |
| CN105139800A (en) * | 2015-08-28 | 2015-12-09 | 西安诺瓦电子科技有限公司 | Abnormal lamp point processing method after correction of LED display device |
| CN105185302A (en) * | 2015-08-28 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method for light point position deviation among monochromatic images and application thereof |
| CN105390092A (en) * | 2015-12-09 | 2016-03-09 | 西安诺瓦电子科技有限公司 | LED display screen image processing method, device and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100818988B1 (en) * | 2006-09-05 | 2008-04-04 | 삼성전자주식회사 | Method and apparatus for processing image signal |
-
2016
- 2016-07-15 CN CN201610560776.8A patent/CN107633806B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101377450A (en) * | 2008-09-19 | 2009-03-04 | 北京巨数数字技术开发有限公司 | System and method for extracting lightness data of display screen dot matrix |
| CN102723054A (en) * | 2012-06-18 | 2012-10-10 | 西安电子科技大学 | Online calibration system and online calibration method for ununiformity of LED (light-emitting diode) display screen |
| CN104900178A (en) * | 2015-06-18 | 2015-09-09 | 西安诺瓦电子科技有限公司 | Method for detecting images with brightness abnormality and LED display screen uniformity correction method |
| CN105139800A (en) * | 2015-08-28 | 2015-12-09 | 西安诺瓦电子科技有限公司 | Abnormal lamp point processing method after correction of LED display device |
| CN105185302A (en) * | 2015-08-28 | 2015-12-23 | 西安诺瓦电子科技有限公司 | Correction method for light point position deviation among monochromatic images and application thereof |
| CN105390092A (en) * | 2015-12-09 | 2016-03-09 | 西安诺瓦电子科技有限公司 | LED display screen image processing method, device and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107633806A (en) | 2018-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109636732A (en) | A kind of empty restorative procedure and image processing apparatus of depth image | |
| US9332247B2 (en) | Image processing device, non-transitory computer readable recording medium, and image processing method | |
| CN102236784A (en) | Screen area detection method and system | |
| CN106251298B (en) | Method and apparatus for processing image | |
| CN106599783B (en) | Video occlusion detection method and device | |
| CN110689501B (en) | Distortion correction method and device, electronic equipment and computer readable storage medium | |
| CN113109368A (en) | Glass crack detection method, device, equipment and medium | |
| KR20140067394A (en) | Apparatus and method for detection mura in display device | |
| WO2017071406A1 (en) | Method and system for detecting pin of gold needle element | |
| CN108154506A (en) | A kind of hex nut automatic testing method | |
| CN114972575A (en) | Linear fitting algorithm based on contour edge | |
| CN109064439B (en) | Partition-based single-side light-entering type light guide plate shadow defect extraction method | |
| CN110879131B (en) | Imaging quality testing method and imaging quality testing device for visual optical system, and electronic apparatus | |
| CN109191516B (en) | Rotation correction method and device of structured light module and readable storage medium | |
| JP2018128309A (en) | Crack detection method | |
| CN103176668B (en) | A kind of shooting method for correcting image for camera location touch system | |
| JP6211798B2 (en) | Foreign matter inspection method and foreign matter inspection apparatus on substrate | |
| KR101977647B1 (en) | Apparatus and Method for Detection MURA in Display Device | |
| CN107633806B (en) | Shading correction processing method for LED display device | |
| CN117291924A (en) | Main machine power supply appearance quality detection method based on machine vision | |
| CN114938410A (en) | Method and system for drawing and checking partitions on mobile phone screen | |
| CN109816720B (en) | Road center detection method, airborne equipment and storage medium | |
| CN109410197B (en) | Method and device for positioning detection area of liquid crystal display | |
| JP2021173566A (en) | Defect detection method and defect detection device | |
| JP6114559B2 (en) | Automatic unevenness detector for flat panel display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 710075 DEF101, Zengyi Square, Xi'an Software Park, No. 72 Zhangbajie Science and Technology Second Road, Xi'an High-tech Zone, Shaanxi Province Applicant after: Xi'an Nova Nebula Technology Co., Ltd. Address before: High tech Zone technology two road 710075 Shaanxi city of Xi'an Province, No. 68 Xi'an Software Park D District 401 Applicant before: Xian Novastar Electronic Technology Co., Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |