Structural part welding seam detection method based on computer vision

Abstract

The invention relates to the technical field of computer vision, in particular to a structural part welding seam detection method based on computer vision. The method comprises the following steps: acquiring assembled structural part images, and identifying a target image with a welding seam in the structural part images by using a neural network; according to the neural network corresponding to the target image, obtaining a class activation graph of the target image with the welding seam as a sensitive area; carrying out threshold segmentation on the gray level image of the class activation graph to obtain a minimum enclosing rectangle of the welding seam; augmenting the minimum enclosing rectangle to obtain a welding seam segmentation area, cutting the welding seam segmentation area from the target image to serve as a welding seam reference image, and partitioning the welding seam reference image; and obtaining a comprehensive difference between every two pixel points by calculating a color distance, a spatial distance and a class activation difference between every two pixel points in the welding seam reference image, and performing super-pixel segmentation on the welding seam reference image according to the comprehensive difference and the number of the partitions to obtain a welding seam area. According to the embodiment of the invention, the accuracy of superpixel segmentation can be improved.

Description

technical field [0001] The invention relates to the technical field of computer vision, in particular to a method for detecting weld seams of structural parts based on computer vision. Background technique [0002] In addition to the requirements for welding technology and welding process, welding quality inspection is also an important part of quality management of welded structures. Welding quality inspection refers to the inspection of welding results, the purpose is to ensure the integrity, reliability, safety and usability of the welded structure. [0003] Due to the complexity of the assembly and manufacturing of assembled structural parts and uncertain factors such as the welding environment, it is easy to produce welds with defects such as welding bumps, pores and spatters. Welding failure will lead to the loss of the function of the assembled structural parts, which will lead to the paralysis of the equipment and cause engineering problems. Inspection of weld seam...

AI Technical Summary

Problems solved by technology

[0003] Due to the complexity of assembly and manufacturing of assembled structural parts and uncertain factors such as welding environment, it is easy to produce weld seams with defects such as weld bumps, pores and spatters

Welding failure will lead to the loss of the function of the assembled structural parts, which will lead to the paralysis of the equipment and cause engineering problems

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