CN117278727A - Image quality automatic detection system and projector - Google Patents
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- CN117278727A CN117278727A CN202311194875.5A CN202311194875A CN117278727A CN 117278727 A CN117278727 A CN 117278727A CN 202311194875 A CN202311194875 A CN 202311194875A CN 117278727 A CN117278727 A CN 117278727A
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- 238000011156 evaluation Methods 0.000 claims abstract description 51
- 230000007547 defect Effects 0.000 claims abstract description 24
- 238000007689 inspection Methods 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims description 46
- 238000004364 calculation method Methods 0.000 claims description 20
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
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Abstract
The invention discloses an image quality automatic detection system and a projector, which are applied to the projector; setting a plurality of black-and-white cameras, and aligning the images projected by the projector; the image quality automatic inspection system includes: the first detection unit is connected with the black-and-white camera and is used for detecting the definition of the projector according to a first black-and-white image of a first image to be detected projected by the projector, which is acquired by the black-and-white camera, and outputting a definition detection result; and the evaluation unit is connected with the first detection unit and is used for evaluating the projection quality of the projector at least according to the definition detection result and outputting a corresponding evaluation result. The invention has the following advantages or beneficial effects: the image quality and the defect of the image projected by the projector can be automatically checked under the condition of no manual intervention; the detection efficiency is high and the detection effect is more accurate.
Description
Technical Field
The invention relates to the field of image quality detection, in particular to an automatic image quality detection system and a projector.
Background
Image quality detection is a technique that evaluates the quality of an image or video. This technique can be used to detect various factors such as sharpness, color accuracy, noise level, brightness, and contrast of an image or video. The image quality detection may be performed manually or automatically. Image quality detection is used in many fields, such as television broadcasting, network video, movie production, monitoring systems, medical imaging, satellite remote sensing, etc. For example, a television station needs to detect the image quality of a program before broadcasting the program to ensure that a viewer can see a high quality image. As another example, image quality detection in medical images may help doctors diagnose diseases more accurately.
Currently, a well-known inspection method of a production line body projector is manual inspection, and manual image quality inspection generally requires human eyes to observe images or videos, and then performs judgment according to personal perception and experience. The method has the advantages of considering the visual perception characteristics of human eyes, but has the disadvantages of low efficiency, high subjectivity and possibly being influenced by factors such as fatigue, psychological state and the like of observers.
In summary, the following drawbacks exist in the prior art:
1. the use of manual detection of image quality can lead to inaccurate detection.
2. The manual detection efficiency is low, and the subjectivity is strong.
Disclosure of Invention
In order to solve the above problems in the prior art, an automatic image quality detection system and a projector are provided.
The specific technical scheme is as follows: an automatic image quality detection system is applied to a projector; setting a black-and-white camera, and aligning the image projected by the projector;
the image quality automatic inspection system includes:
the first detection unit is connected with the black-and-white camera and is used for detecting the definition of the projector according to a first black-and-white image of a first image to be detected projected by the projector, which is acquired by the black-and-white camera, and outputting a definition detection result;
and the evaluation unit is connected with the first detection unit and is used for evaluating the projection quality of the projector at least according to the definition detection result and outputting a corresponding evaluation result.
Preferably, the first image to be detected is a black-and-white line image;
the first detection unit includes:
the first calculation module is used for calculating a black gray value and a white gray value according to the first black-and-white image;
the first processing module is connected with the first calculating module and is used for processing to obtain the gray ratio of the black gray value and the white gray value, processing to obtain the definition detection result according to the gray ratio and outputting the definition detection result.
Preferably, a black-and-white camera is provided, further comprising:
the second detection unit is respectively connected with the black-and-white camera and the evaluation unit and is used for detecting the brightness of the projector according to a second black-and-white image of a second image to be detected projected by the projector, which is acquired by the black-and-white camera, and outputting a brightness detection result;
the second image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the brightness detection result and outputting a corresponding evaluation result;
the second detection module includes:
the second computing module is used for judging and obtaining the second black-and-white image with the minimum brightness and the second black-and-white image with the maximum brightness from a plurality of second black-and-white images corresponding to the second image to be detected;
and the second processing module is connected with the second calculating module and is used for processing and obtaining the gray level difference value between the second black-and-white image with the minimum brightness and the second black-and-white image with the maximum brightness, processing and obtaining the brightness detection result according to the gray level difference value and outputting the brightness detection result.
Preferably, a plurality of the black-and-white cameras are provided, and further comprising:
the third detection unit is respectively connected with the black-and-white cameras and the evaluation unit and is used for carrying out defect detection on the projector according to a third black-and-white image formed by integrating a plurality of third images to be detected projected by the projector and acquired by the black-and-white cameras and outputting a defect detection result;
the third image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the defect detection result and outputting a corresponding evaluation result;
the third detection unit includes:
the third calculation module is used for calculating the outline of the spot in the third black-and-white image and obtaining a corresponding outline map;
the third processing module is connected with the third computing module and is used for carrying out binarization processing on the profile graph so as to obtain the profile information of the spots;
the first output module is connected with the third processing module and is used for judging whether the third black-and-white image has obvious spots or not according to the contour information, and outputting a corresponding judging result as the defect detection result.
Preferably, the third detection unit further includes:
the first conversion module is used for converting the third black-and-white image into a gray scale image;
the fourth processing module is connected with the first conversion module and is used for carrying out dynamic binarization processing on the gray level map and obtaining a binarization map;
the fourth acquisition module is connected with the fourth processing module and is used for acquiring a first gray value of a suspicious point in the binarization graph and a second gray value of an area around the suspicious point;
and the fourth calculation module is connected with the fourth acquisition module and is used for calculating a gray level difference according to the first gray level value and the second gray level value, judging whether the suspicious point is a spot or not according to the gray level difference, adding a corresponding judgment result into the defect detection result and outputting the result.
Preferably, a color camera is arranged to align the image projected by the projector;
the image quality automatic inspection system further includes:
the fourth detection unit is respectively connected with the color camera and the evaluation unit and is used for detecting the color gamut of the projector according to the color image of the fourth image to be detected projected by the projector, which is acquired by the color camera, and outputting a color gamut detection result;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the color gamut detection result and outputting a corresponding evaluation result;
the fourth image to be detected is a color bar image;
the fourth detection unit includes:
the color calibration module is used for carrying out color calibration on the color image and obtaining a color calibration image;
the color frequency domain transformation module is connected with the color calibration module and is used for performing color frequency domain transformation on the color calibration image and calculating an HSV value;
and the detection module is connected with the color frequency domain transformation module and is used for carrying out color gamut detection on the image quality of the projector according to the HSV value and outputting the color gamut detection result.
Preferably, a plurality of black-and-white cameras are provided, further comprising:
a fifth detection unit, which is respectively connected with the black-and-white cameras and the evaluation unit, and is used for detecting the color overlapping ratio of the projector according to a fourth black-and-white image formed by integrating a plurality of fifth images to be detected projected by the projector, which are acquired by the black-and-white cameras, and outputting a color overlapping ratio detection result;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the color overlapping ratio detection result and outputting a corresponding evaluation result;
the fifth image to be detected is a cross bar image which respectively and independently comprises RGB three colors;
the fifth detection unit includes:
the fifth processing module is used for respectively carrying out binarization processing on the fourth black-and-white images corresponding to RGB three colors so as to respectively obtain center coordinates of the fourth images;
and the fifth calculation module is connected with the fifth processing module and is used for judging and obtaining the color coincidence degree detection result of the projector according to all the center coordinates and outputting the color coincidence degree detection result.
Preferably, the fifth calculation module includes:
the first judging submodule is used for judging and obtaining the color horizontal coincidence degree of the projector according to the abscissa of all the center point coordinates;
the second judging sub-module is used for judging and obtaining the color vertical coincidence degree of the projector according to the ordinate of all the center point coordinates;
and the integration submodule is respectively connected with the first judging submodule and the second judging submodule and is used for integrating the color horizontal coincidence degree and the color vertical coincidence degree to obtain and output a color coincidence degree detection result.
A projector, wherein, adopt the above-mentioned image quality automatic checkout system to carry on the automatic detection of the projection quality to the said projector.
The technical scheme has the following advantages or beneficial effects:
1. the image quality and the defect of the image projected by the projector can be automatically checked under the condition of no manual intervention;
2. the detection efficiency is high and the detection effect is more accurate.
Drawings
Embodiments of the present invention will now be described more fully with reference to the accompanying drawings. The drawings, however, are for illustration and description only and are not intended as a definition of the limits of the invention.
FIG. 1 is a schematic diagram of an image quality inspection system including a first detecting unit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first detecting unit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an image quality automatic inspection system including a first detecting unit and a second detecting unit according to an embodiment of the present invention;
FIG. 4 is a schematic block diagram of a second detecting unit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an image quality automatic inspection system including a first detecting unit and a third detecting unit according to an embodiment of the present invention;
FIG. 6 is a schematic block diagram of a third detecting unit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of an image quality inspection system including a first inspection unit and a fourth inspection unit according to an embodiment of the present invention;
FIG. 8 is a schematic block diagram of a fourth detecting unit according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a structure including a first detecting unit and a fifth detecting unit according to an embodiment of the present invention;
fig. 10 is a schematic block diagram of a fifth detecting unit according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of a sub-module structure of a fifth computing module according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an image quality automatic inspection system according to a preferred embodiment of the present invention, which includes a first detecting unit, a second detecting unit, a third detecting unit, a fourth detecting unit and a fifth detecting unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
The invention comprises an image quality automatic detection system which is applied to a projector; wherein as shown in fig. 1, a black-and-white camera 1 is arranged to aim at the image projected by the projector;
the image quality automatic inspection system includes:
the first detection unit 2 is connected with the black-and-white camera 1 and is used for detecting the definition of the projector according to a first black-and-white image of a first image to be detected projected by the projector, which is acquired by the black-and-white camera 1, and outputting a definition detection result;
and the evaluation unit 3 is connected with the first detection unit 2 and is used for evaluating the projection quality of the projector at least according to the definition detection result and outputting a corresponding evaluation result.
Specifically, for the detection of image quality by using manpower in the prior art, the detection inaccuracy, the low efficiency of the manual detection and the high subjectivity are caused, in the above embodiment, the first black-and-white image is obtained by shooting the image projected by the projector to be detected by using the black-and-white camera 1, and the first detection unit 2 detects the definition of the projector by detecting the first black-and-white image. The evaluation unit 3 can evaluate the projection quality of the projector at least according to the sharpness detection result, and obtain a corresponding evaluation result.
In a preferred embodiment of the present invention, the first image to be detected is a black-and-white line image;
as shown in fig. 2, the first detection unit 2 includes:
a first calculating module 21, configured to calculate a black gray value and a white gray value according to the first black-and-white image;
the first processing module 22 is connected to the first calculating module 21, and is configured to process the gray ratio of the black gray value and the white gray value, obtain a sharpness detection result according to the gray ratio, and output the sharpness detection result.
Specifically, in the above embodiment, the first detecting unit 2 calculates the black gray value and the white gray value of the first black-and-white image through the first calculating module 21, and the first processing module 22 is configured to compare the ratio of the black gray value to the white gray value with the existing specification, so as to obtain the definition detection result of the projector, and output the definition detection result.
In a preferred embodiment of the present invention, as shown in fig. 3, further comprising:
the second detection unit 4 is respectively connected with the black-and-white camera 1 and the evaluation unit 3, and is used for detecting the brightness of the projector according to a second black-and-white image of a second image to be detected projected by the projector, which is acquired by the black-and-white camera 1, and outputting a brightness detection result;
the second image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit 3 is further configured to evaluate the projection quality of the projector at least according to the brightness detection result, and output a corresponding evaluation result;
as shown in fig. 4, the second detection module 73 includes:
a second calculation module 41, configured to determine, from a plurality of second black-and-white images corresponding to the second image to be detected, a second black-and-white image with the minimum brightness and a second black-and-white image with the maximum brightness;
the second processing module 42 is connected to the second calculating module 41, and is configured to process and obtain a gray level difference value between the second black-and-white image with the minimum brightness and the second black-and-white image with the maximum brightness, and obtain and output a brightness detection result according to the gray level difference value.
Specifically, the second detecting unit 4 detects the brightness of the projector, so that the projector is used to project a plurality of solid-color photographs with different brightness, the solid-color photograph is taken by the black-and-white camera 1 to obtain a second black-and-white image, and the second detecting unit 4 detects the brightness of the second black-and-white image and outputs the brightness result. The evaluation unit 3 may also evaluate the projection quality of the projector based on the brightness detection result. In the present embodiment, the evaluation unit 3 may evaluate not only the projection quality of the projector based on the brightness detection result but also the projection quality of the projector based on other detection results.
Further, in the above embodiment, the second calculating module 41 in the second detecting module 73 is configured to obtain the second black-and-white image with the minimum brightness and the maximum brightness, calculate the gray-scale difference between the second black-and-white image with the minimum brightness and the maximum brightness through the second processing module 42, and compare the gray-scale difference with the existing specification to obtain the brightness detection result of the projector.
In a preferred embodiment of the present invention, as shown in fig. 5, a plurality of black-and-white cameras 1 are provided, further comprising:
the third detection unit 5 is respectively connected with the black-and-white camera 1 and the evaluation unit 3, and is used for detecting defects of the projector according to a third black-and-white image formed by integrating a plurality of third images to be detected projected by the projector and collected by the black-and-white cameras 1, and outputting a defect detection result;
the third image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit 3 is further used for evaluating the projection quality of the projector at least according to the defect detection result and outputting a corresponding evaluation result;
as shown in fig. 6, the third detection unit 5 includes:
a third calculation module 51, configured to calculate a contour of the spot in the third black-and-white image, and obtain a corresponding contour map;
the third processing module 52 is connected to the third computing module 51, and is configured to perform binarization processing on the contour map, so as to obtain contour information of the spots;
the first output module 53 is connected to the third processing module 52, and is configured to determine whether a third black-and-white image has a distinct spot according to the contour information, and output a corresponding determination result as a defect detection result.
Specifically, in the above embodiment, the plurality of black-and-white cameras 1 are provided in the third detecting unit 5, because the projection range of the projector is large, the defect detection needs to detect the entire picture projected by the projector, but one black-and-white camera 1 cannot take a complete picture, so that 6 black-and-white cameras 1 are provided, and the plurality of third to-be-detected pictures taken by the black-and-white cameras 1 are integrated, and the repeated parts are removed, thereby forming the third black-and-white image.
Further, in the above embodiment, when there are obvious spots or plaques in the third black-and-white image, that is, visible to the naked eye, the third computing module 51 computes the outline of the spots in the third black-and-white image, so as to obtain the corresponding outline, so that the spots are more easily identified, the third processing module 52 performs binarization processing based on the outline, so as to obtain the outline information.
Further, in the above embodiment, the contour information includes the number, the positions and the areas of the spots, and whether the black-and-white image has obvious spots can be determined by the contour information, and further, the projection quality of the projector can be evaluated as a result of defect detection.
In another preferred embodiment of the present invention, as shown in fig. 6, the third detecting unit 5 further includes:
a first conversion module 54 for converting the third black-and-white image into a gray scale map;
the fourth processing module 55 is connected with the first conversion module 54 and is used for performing dynamic binarization processing on the gray level map and obtaining a binarized map;
the fourth obtaining module 56 is connected to the fourth processing module 55, and is configured to obtain a first gray value of a suspicious point in the binary image and a second gray value of a surrounding area of the suspicious point;
the fourth calculation module 57 is connected to the fourth acquisition module 56, and is configured to calculate a gray level difference according to the first gray level value and the second gray level value, determine whether the suspicious spot is a spot according to the gray level difference, and add the corresponding determination result to the defect detection result and output the result.
Specifically, in the above embodiment, the defect detection of the inconspicuous spots and the slabs in the third black-and-white image may also be performed by the third detection unit 5.
Further, when there is no visible spot in the third black-and-white image, the first converting module 54 converts the third black-and-white image into a gray scale image, and sets different binarization values according to the gray scale image, that is, performs dynamic binarization processing, and obtains a binarization image, and a suspicious spot is obtained in the binarization image. And judging whether the suspicious points are spots or not according to the suspicious points and the difference value of the gray values of the areas around the suspicious points, and further adding the judging result into the defect detection result.
Further, fig. 6 is a block diagram of the third detection unit according to the present invention, where the third detection unit includes the above two embodiments, and one embodiment may be selected to detect the projection image quality of the projector according to the actual use situation, and then the detection result in one embodiment may be output separately, or the above two embodiments may be combined together to detect the image quality of the projector, and the two detection results may be combined together to be used as a defect detection result of the projector, and further the projection quality of the projector may be evaluated by the defect detection result.
In the preferred embodiment of the invention, a color camera 6 is provided, aimed at the image projected by the projector;
as shown in fig. 7, the image quality automatic inspection system further includes:
a fourth detection unit 7, connected to the color camera 6 and the evaluation unit 3, respectively, for detecting the color gamut of the projector according to the color image of the fourth image to be detected projected by the projector collected by the color camera 6, and outputting a color gamut detection result;
the evaluation unit 3 is further configured to evaluate the projection quality of the projector at least according to the color gamut detection result, and output a corresponding evaluation result;
the fourth image to be detected is a color bar image;
as shown in fig. 8, the fourth detection unit 7 includes:
a color calibration module 71, configured to perform color calibration on the color image, and obtain a color calibration image;
the color frequency domain transformation module 72 is connected with the color calibration module 71 and is used for performing color frequency domain transformation on the color calibration image and calculating HSV values;
the detection module 73 is connected to the color frequency domain transformation module 72, and is configured to perform color gamut detection on the image quality of the projector according to the HSV value and output a color gamut detection result.
Specifically, a color camera 6 is disposed in the fourth detecting module 73, and a projector is used to project a color bar pattern as a fourth pattern to be detected, and the color camera 6 is used to shoot so as to obtain a color pattern.
Further, in the fourth detecting unit 7, since there may be a deviation in the acquired color pattern, the color calibration is performed on the color pattern by the color calibration module 71 to ensure consistency and accuracy of the color; the color calibration image after color calibration is subjected to color frequency domain transformation, and is converted into an HSV color space which is closer to the perception of human eyes on colors, so that color analysis is more convenient, the HSV value of each pixel in the color calibration image can be calculated through the HSV value, color information is obtained more accurately, and a color gamut detection result is obtained according to the color information.
In the preferred embodiment of the present invention, as shown in fig. 9, a plurality of black-and-white cameras 1 are provided, and further comprising:
a fifth detection unit 8, connected to the multiple black-and-white cameras 1 and the evaluation unit 3, respectively, and configured to detect a color overlapping ratio of the projector according to a fourth black-and-white image formed by integrating multiple fifth images to be detected projected by the projector collected by the multiple black-and-white cameras 1, and output a color overlapping ratio detection result;
the evaluation unit 3 is further used for evaluating the projection quality of the projector at least according to the color overlapping ratio detection result and outputting a corresponding evaluation result;
the fifth image to be detected is a cross bar image which respectively and independently comprises RGB three colors;
as shown in fig. 10, the fifth detection unit 8 includes:
a fifth processing module 81, configured to perform binarization processing on the fourth black-and-white images corresponding to the RGB three colors, so as to obtain center coordinates of each fourth image;
and the fifth calculation module 82 is connected with the fifth processing module 81, and is used for judging and obtaining the color contact ratio detection result of the projector according to all the center coordinates and outputting the detection result.
Specifically, in the above embodiment, it is further necessary to detect the color overlapping ratio of the projector, so a fifth detecting unit 8 is provided, and the fifth image to be detected projected by the projector in the fifth detecting unit 8 is a cross bar image that includes RGB three colors separately; the center point coordinates in each fourth image can be obtained by binarizing the fourth black-and-white image without mechanical positioning.
Further, the third calculation module 51 may compare the processed center coordinates of all points with the existing specification, so as to obtain a color overlapping ratio detection result.
In the preferred embodiment of the present invention, as shown in fig. 11, the third calculation module 51 includes:
a first judging sub-module 821, configured to judge and obtain a color horizontal coincidence ratio of the projector according to the abscissa of all the coordinates of the center point;
a second judging sub-module 822, configured to judge, according to the ordinate of all the coordinates of the center points, to obtain the color vertical coincidence of the projector;
the integration sub-module 823 is connected to the first judging sub-module 821 and the second judging sub-module 822 respectively, and is used for integrating the color horizontal overlapping degree and the color vertical overlapping degree to obtain a color overlapping degree detection result and outputting the color overlapping degree detection result.
Specifically, in the third calculation module 51, the image projected by the projector is a three-primary-color cross bar pattern, so that the horizontal coordinate difference value between the central coordinates acquired by the green pattern and the central coordinates acquired by the red pattern and the blue pattern can be combined with the existing specification to determine the overlap ratio of the projector in the horizontal direction so as to obtain the color horizontal overlap ratio; and according to the difference value of the vertical coordinate between the central coordinates acquired by the green pattern and the central coordinates acquired by the red pattern and the blue pattern, and the existing specification, judging the overlap ratio of the projector in the vertical direction so as to obtain the color vertical overlap ratio.
Further, the obtained color horizontal coincidence degree and the color vertical coincidence degree are integrated, and further, a color coincidence degree detection result can be obtained.
Hereinafter, the above technical solution will be specifically described by means of a specific embodiment, where the selection includes a first detection unit, a second detection unit, a third detection unit, a fourth detection unit, and a fifth detection unit at the same time, and the image quality detection system is specifically shown in fig. 12. The implementation principle of each detection unit is as described above, and in this embodiment, the projection image quality of the projector needs to be comprehensively evaluated according to the definition detection result, the brightness detection result, the defect detection result, the color gamut detection result, and the color overlap ratio detection result. Of course, in other embodiments of the present invention, one, two or more of the above-mentioned respective detection units may be selected to evaluate the projection image quality of the projector.
In a preferred embodiment of the present invention, when the output results of at least two detection units are selected to evaluate the projection image quality of the projector, a weighted calculation may be selected. For example:
different weight values are preset for the output results of different detection units respectively.
After the output results of different detection units are obtained, firstly carrying out normalization calculation on all the output results to unify the output results, then carrying out weighting calculation on all the output results according to different weight values to obtain an evaluation value of the projection image quality of the projector, and finally evaluating the projection image quality of the projector according to a preset qualification threshold range of the evaluation value or a grading range of the evaluation value.
Of course, in other embodiments of the present invention, when the output results of at least two detection units are selected to evaluate the projection image quality of the projector, other manners may be adopted, for example, the projection image quality of the projector is comprehensively determined according to the difference between the output results of different detection units and the corresponding target values, and the like, which are not described herein.
In summary, in the technical scheme of the invention, the image quality of the projector when projecting different images is comprehensively detected by arranging the color camera and/or the black-and-white camera, so that the projection image quality of the projector can be more accurately evaluated, and better service is provided for the production and quality monitoring of the projector.
In a preferred embodiment of the present invention, a projector is further provided, wherein the image quality automatic detection system is used for automatically detecting the projection quality of the projector.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. An automatic image quality detection system is applied to a projector; the method is characterized in that a black-and-white camera is arranged to aim at the image projected by the projector;
the image quality automatic inspection system includes:
the first detection unit is connected with the black-and-white camera and is used for detecting the definition of the projector according to a first black-and-white image of a first image to be detected projected by the projector, which is acquired by the black-and-white camera, and outputting a definition detection result;
and the evaluation unit is connected with the first detection unit and is used for evaluating the projection quality of the projector at least according to the definition detection result and outputting a corresponding evaluation result.
2. The automatic image quality detection system according to claim 1, wherein the first image to be detected is a black-and-white line image;
the first detection unit includes:
the first calculation module is used for calculating a black gray value and a white gray value according to the first black-and-white image;
the first processing module is connected with the first calculating module and is used for processing to obtain the gray ratio of the black gray value and the white gray value, processing to obtain the definition detection result according to the gray ratio and outputting the definition detection result.
3. An image quality automatic detection system according to claim 1, wherein a black-and-white camera is provided,
further comprises:
the second detection unit is respectively connected with the black-and-white camera and the evaluation unit and is used for detecting the brightness of the projector according to a second black-and-white image of a second image to be detected projected by the projector, which is acquired by the black-and-white camera, and outputting a brightness detection result;
the second image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the brightness detection result and outputting a corresponding evaluation result;
the second detection module includes:
the second computing module is used for judging and obtaining the second black-and-white image with the minimum brightness and the second black-and-white image with the maximum brightness from a plurality of second black-and-white images corresponding to the second image to be detected;
and the second processing module is connected with the second calculating module and is used for processing and obtaining the gray level difference value between the second black-and-white image with the minimum brightness and the second black-and-white image with the maximum brightness, processing and obtaining the brightness detection result according to the gray level difference value and outputting the brightness detection result.
4. The automatic image quality detection system according to claim 1, wherein a plurality of the black-and-white cameras are provided, further comprising:
the third detection unit is respectively connected with the black-and-white cameras and the evaluation unit and is used for carrying out defect detection on the projector according to a third black-and-white image formed by integrating a plurality of third images to be detected projected by the projector and acquired by the black-and-white cameras, and outputting a defect detection result;
the third image to be detected is a plurality of solid-color images with different brightness;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the defect detection result and outputting a corresponding evaluation result;
the third detection unit includes:
the third calculation module is used for calculating the outline of the spot in the third black-and-white image and obtaining a corresponding outline map;
the third processing module is connected with the third computing module and is used for carrying out binarization processing on the profile graph so as to obtain the profile information of the spots;
the first output module is connected with the third processing module and is used for judging whether the third black-and-white image has obvious spots or not according to the contour information, and outputting a corresponding judging result as the defect detection result.
5. The automatic image quality detecting system according to claim 4, wherein the third detecting unit further comprises:
the first conversion module is used for converting the third black-and-white image into a gray scale image;
the fourth processing module is connected with the first conversion module and is used for carrying out dynamic binarization processing on the gray level map and obtaining a binarization map;
the fourth acquisition module is connected with the fourth processing module and is used for acquiring a first gray value of a suspicious point in the binarization graph and a second gray value of an area around the suspicious point;
and the fourth calculation module is connected with the fourth acquisition module and is used for calculating a gray level difference according to the first gray level value and the second gray level value, judging whether the suspicious point is a spot or not according to the gray level difference, adding a corresponding judgment result into the defect detection result and outputting the result.
6. The automatic image quality detection system according to claim 1, wherein a color camera is provided to align the image projected by the projector;
the image quality automatic inspection system further includes:
the fourth detection unit is respectively connected with the color camera and the evaluation unit and is used for detecting the color gamut of the projector according to the color image of the fourth image to be detected projected by the projector, which is acquired by the color camera, and outputting a color gamut detection result;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the color gamut detection result and outputting a corresponding evaluation result;
the fourth image to be detected is a color bar image;
the fourth detection unit includes:
the color calibration module is used for carrying out color calibration on the color image and obtaining a color calibration image;
the color frequency domain transformation module is connected with the color calibration module and is used for performing color frequency domain transformation on the color calibration image and calculating an HSV value;
and the detection module is connected with the color frequency domain transformation module and is used for carrying out color gamut detection on the image quality of the projector according to the HSV value and outputting the color gamut detection result.
7. The automatic image quality detection system according to claim 1, wherein a plurality of black-and-white cameras are provided, further comprising:
a fifth detection unit, which is respectively connected with the black-and-white cameras and the evaluation unit, and is used for detecting the color overlapping ratio of the projector according to a fourth black-and-white image formed by integrating a plurality of fifth images to be detected projected by the projector, which are acquired by the black-and-white cameras, and outputting a color overlapping ratio detection result;
the evaluation unit is also used for evaluating the projection quality of the projector at least according to the color overlapping ratio detection result and outputting a corresponding evaluation result;
the fifth image to be detected is a cross bar image which respectively and independently comprises RGB three colors;
the fifth detection unit includes:
the fifth processing module is used for respectively carrying out binarization processing on the fourth black-and-white images corresponding to RGB three colors so as to respectively obtain center coordinates of the fourth images;
and the fifth calculation module is connected with the fifth processing module and is used for judging and obtaining the color coincidence degree detection result of the projector according to all the center coordinates and outputting the color coincidence degree detection result.
8. The automatic image quality detection system according to claim 7, wherein the fifth calculation module includes:
the first judging submodule is used for judging and obtaining the color horizontal coincidence degree of the projector according to the abscissa of all the center point coordinates;
the second judging sub-module is used for judging and obtaining the color vertical coincidence degree of the projector according to the ordinate of all the center point coordinates;
and the integration submodule is respectively connected with the first judging submodule and the second judging submodule and is used for integrating the color horizontal coincidence degree and the color vertical coincidence degree to obtain and output a color coincidence degree detection result.
9. A projector, characterized in that the projector is automatically detected for projection quality by using the image quality automatic detection system according to any one of claims 1 to 8.
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| CN202311194875.5A CN117278727A (en) | 2023-09-15 | 2023-09-15 | Image quality automatic detection system and projector |
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