Method and system for detecting workpiece surface defects

Abstract

The invention discloses a workpiece surface defect detection method and system. The method comprises the steps that according to the cycle characteristics of the texture of a to-be-detected workpieceimage, the to-be-detected workpiece image is segmented, and a to-be-detected unit image set is obtained; each to-be-detected unit image in the to-be-detected unit image set is compared with the corresponding preset standard unit image, and a defect unit image set corresponding to the to-be-detected unit image set is obtained; the defect unit image set is spliced, and the corresponding spliced image is obtained; the defects on the spliced image are detected, and the corresponding workpiece surface defect information is obtained. According to the workpiece surface defect detection method and system, the to-be-detected workpiece image is segmented reasonably, the defect unit images are obtained by comparing the to-be-detected unit images and the preset standard unit images, then the defect unit images are spliced, and finally, the workpiece defect information is obtained. Because the small unit images are used for comparison, the processing speed of an industrial personal computer is increased, and the defect detection speed is increased.

Description

technical field [0001] The invention relates to the field of automatic appearance detection, in particular to a method and system for detecting surface defects of workpieces. Background technique [0002] In the field of automatic appearance inspection, a linear charge-coupled device (CCD) camera is usually used to scan the workpiece. [0003] But when the size of the workpiece is large, the resolution of the image taken by the linear array CCD camera is extremely high, and the size can reach hundreds of megabytes. At this time, the image data is too large, which leads to the slowdown of the processing speed of the automatic detection of the industrial computer, which cannot satisfy the automatic appearance. Speed ​​requirements for defect detection. Contents of the invention [0004] In view of this, the purpose of the present invention is to provide a workpiece surface defect detection method and system, which can improve the detection speed of workpiece surface defects...

AI Technical Summary

Problems solved by technology

[0003] But when the size of the workpiece is large, the resolution of the image taken by the linear array CCD camera is extremely high, and the size can reach hundreds of megabytes. At this time, the image data is too large, which leads to the slowdown of the processing speed of the automatic detection of the industrial computer, which cannot satisfy the automatic appearance. Speed ​​Requirements for Defect Detection

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