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Vignetting correction system and method

A correction method and technology for a correction system, which are applied to parts of TV systems, TVs, and color TVs, etc., can solve the problems of misjudgment of vignetting, misjudgment adjustment algorithm missed detection, etc., so as to reduce the load and achieve the effect of good effect

Active Publication Date: 2018-06-01
WUHAN JINGLI ELECTRONICS TECH
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AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a vignetting correction system and method, which solves the problem that the vignetting is misjudged as a defect in the automatic optical inspection in the prior art or the defect is missed by adjusting the algorithm to avoid misjudgment.

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  • Vignetting correction system and method

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Embodiment Construction

[0050] The embodiment of the present application provides a vignetting correction system and method, which solves the problem in the prior art that the vignetting is misjudged as a defect in the automatic optical inspection or the defect is missed by adjusting the algorithm to avoid misjudgment.

[0051] The technical solution of the embodiment of the present application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0052] A vignetting correction method, comprising the following steps:

[0053] Obtaining N images taken with uniform illumination, obtaining an N+1th image according to the N images, and obtaining a vignetting correction coefficient according to the N+1th image;

[0054] Obtain a test image, analyze the test image, and obtain image pixel data;

[0055] performing vignetting correction on the image pixel data according to the vignetting correction coefficient to obtain vignetting corrected image data;

[0056] Encapsula...

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Abstract

The invention belongs to the technical field of image processing, and discloses a vignetting correction system and method. The method includes: obtaining a vignetting correction coefficient accordingto a plurality of images; obtaining a test image and obtaining image pixel data through analysis; and performing vignetting correction on the image pixel data according to the vignetting correction coefficient, and obtaining, packaging and outputting vignetting correction image data. The system comprises a first PC terminal, cameras and a FPGA platform; the cameras are used for shooting and obtaining test images; the FPGA platform is used for analyzing the test images, obtaining image pixel data, performing vignetting correction on the image pixel data according to the vignetting correction coefficient, and obtaining, packaging and outputting the vignetting correction image data; and the first PC terminal is used for obtaining the vignetting correction coefficient and displaying and / or detecting the vignetting correction image data according to a plurality of images. According to the system and method, the problem that in the prior art, the vignetting is misjudged as the defect or missed detection defects are caused by adjustment of the algorithm to avoid misjudgment in automated optical inspection is solved.

Description

technical field [0001] The invention relates to the technical field of graphics processing, in particular to a vignetting correction system and method. Background technique [0002] Automated Optical Inspection (AOI, Automated Optical Inspection) is an effective inspection method for industrial automation. Machine vision is used as the inspection standard technology. It is widely used in LCD / TFT, transistor and PCB industrial processes, and it can be extended to security systems for people's livelihood. . Taking LCD / TFT as an example, during automatic detection, the machine scans the LCD / TFT through the camera, collects images, and checks out the defects on the LCD / TFT after image processing. [0003] As the requirements for AOI detection performance and efficiency are getting higher and higher, the quality requirements for the collected images are also getting higher and higher. In the collected images, due to the lens, there will be "vignetting" phenomenon. That is, whe...

Claims

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Application Information

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IPC IPC(8): H04N5/243H04N5/367
CPCH04N23/76H04N25/68
Inventor 汪舟邓标华欧昌东
Owner WUHAN JINGLI ELECTRONICS TECH
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