Visual defect detection equipment and detection method thereof

Abstract

The invention relates to and provides visual defect detection equipment and a detection method thereof. The detection method comprises the following steps: acquiring the distribution probability of astandard component digital image by a generative adversarial network, and performing training to obtain a generator G capable of mapping a hidden space vector to the standard component digital image;performing training again to obtain a decoder D capable of realizing mapping from the digital image to the hidden space vector; lastly, inputting a binary gray level image of a detected workpiece obtained by preprocessing into the decoder D and the generator G in sequence to obtain a proximate standard image proximate to the detected workpiece; acquiring a differential value between the binary gray image of the detected workpiece and the proximate standard image by using a difference image method; and comparing the difference value with a threshold value to judge whether the detected workpieceis defective or not. The detection method has the advantages of high portability, high universality, short trial and error time and high detection accuracy.

Description

technical field [0001] The invention relates to the technical field of visual inspection, in particular to a visual defect detection device and a detection method thereof. Background technique [0002] Visual inspection refers to converting the ingested target into an image signal through machine vision products, sending it to a special image processing system, and converting it into a digital signal according to pixel distribution, brightness, color and other information; the image system performs various calculations on these signals. Extract the characteristics of the target, and then control the on-site equipment action according to the result of the discrimination. In short, visual inspection is a way of measuring and judging by machines instead of human eyes. [0003] The feature of machine vision inspection is to improve the flexibility and automation of production. At present, in some dangerous working environments that are not suitable for manual work or where arti...

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Problems solved by technology

[0008] The purpose of the embodiments of the present invention is to provide a visual defect detection device and its detection method to solve the problem that the existing visual defect detection method can obtain ideal detection results on some workpieces, but the expected detection results cannot be achieved when transplanted to other workpieces question

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