Light source regulation method for LCD glass substrate defect detection

Abstract

The invention discloses a light source regulation method for LCD glass substrate defect detection. Two white papers are used for determining a reference plane where a lighting area is and a datum lineperpendicular to a motion direction, a reflected lighting area of a reflected light source and transmission light area of a transmission light source are overlapped at the datum line and parallel tothe datum line, and perpendicular to a motion direction of a motion platform. The light source regulation method provided by the invention simple and efficient, has high repeatability, is beneficial for operation of experimenters, is beneficial for regulating a light source in practical application, and can be generalized in light source regulation of all robot vision system.

Description

technical field [0001] The invention relates to the technical field of machine vision, in particular to a light source adjustment method for defect detection of glass substrates of liquid crystal screens. Background technique [0002] With the rise of artificial intelligence, machine vision is more and more widely used in various fields. Among them, defect detection of glass substrates of TFT-LCD liquid crystal screens based on machine vision is an important research project in various countries. The first step of the inspection system based on machine vision is to collect stable, clear and usable images, which is an important step in the entire inspection system and the most important step to ensure the high precision requirements of the entire defect inspection system. Therefore, in order to collect high-quality and stable images and ensure the detection accuracy of the system, the light source adjustment of the camera is very important. In the process of TFT-LCD liquid c...

AI Technical Summary

Problems solved by technology

[0003] Based on the technical problems existing in the background technology, the present invention proposes a light source adjustment method for liquid crystal screen glass substrate defect detection. Two pieces of white paper are used to determine the reference plane where the illuminated area is located and the reference line perpendicular to the moving direction, so that the reflection The reflected illumination area of ​​the light source and the transmitted illumination area of ​​the transmitted light source overlap at the reference line and are parallel to the reference line, perpendicular to the motion direction of the motion platform, and adjust the optimal light source position so that the camera can obtain high-quality and stable images to ensure system detection Accuracy, to solve the problem that traditional adjustments rely on experience and cannot be maintained

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