Edge defect detection method and system for glass panel

A defect detection and glass panel technology, which is applied in the direction of optical defect/defect test, measurement device, image data processing, etc., can solve the problems of poor system expansion ability, inability to meet real-time detection, complex algorithm, etc.

Active Publication Date: 2016-03-16
冯平 +1
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method and system for detecting edge defects of glass panels, aiming to solve the problems that the existing algorithms are complex, cannot meet the requirements of real-time detection, and the adaptability is not enough, and the system expansion ability is poor

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  • Edge defect detection method and system for glass panel
  • Edge defect detection method and system for glass panel
  • Edge defect detection method and system for glass panel

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[0077] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0078] The present invention performs binary processing on the collected image after grayscale conversion, extracts the region of interest and its centerline, and obtains the coordinates of each point on the centerline, and the grayscale value of each point depends on the upper and lower areas of the coordinates of the point. Average gray value, calculate the average gray value of the center line, set the threshold based on the average value to judge the maximum value and minimum value, and detect the defect.

[0079] Based on the above principles, the present invention provides figure 1 A method ...

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Abstract

The invention is applicable to glass panel edge defect detection, and provides an edge defect detection method for a glass panel. The method comprises the steps of: A. performing glass panel image acquisition and performing gray-scale conversion, then performing binarization processing so as to obtain a binarization image, and extracting a contour of a region of interest; B. processing the contour of the region of interest so as to obtain a center line image, and traversing the center line image to obtain point coordinates of each point on a center line; C. extracting a gray-scale image corresponding to the contour of the region of interest, and obtaining a gray-scale value corresponding to the point according to the point coordinates; and D. processing the gray-scale value of the center line, then computing a gray-scale difference mean value of the center line, and determining whether an edge defect exists or not according to the gray-scale difference mean value of the center line and marking the edge defect. According to the edge defect detection method for the glass panel, which is provided by the present invention, the contour of the region of interest of the edge is extracted according to contour features of the edge of the glass panel, and defect detection is performed on the edge of the glass panel based on the gray-scale mean value of an adjacent region of the center line of the contour of the region of interest; and the method can be used for detecting defects of edges of multiple models of glass panels.

Description

technical field [0001] The invention belongs to the field of panel detection, and in particular relates to an edge defect detection method and system for a glass panel based on the average value of the centerline neighborhood gray scale. Background technique [0002] At present, there are three types of detection and identification methods for glass panel surface defects: image matching and comparison methods, non-image matching and comparison methods and hybrid methods. (1) Image matching and comparison method. This method is to match the standard image as a template with the detected image, that is, XOR operation. This method is suitable for defects such as gaps and edge bumps in the image, but for many types The edge defect of the glass panel is not fixed in length and width, so this method is not suitable for the edge defect detection of the glass panel of the mobile phone. (2) Non-image matching and comparison method This method does not require a template image, it ju...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06K9/46G01N21/88
CPCG01N21/8851G01N2021/8887G06T2207/20104G06T2207/30108G06V10/443G06V10/44G06V10/48
Inventor 冯平程涛刘新辉彭涛孙高磊
Owner 冯平
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