Visual defect detection equipment and detection method thereof

A technology for visual defects and detection methods, applied in the field of visual inspection, can solve problems such as failure to achieve expected detection results, and achieve the effects of short trial and error time, strong portability, and strong versatility

Active Publication Date: 2018-11-02
SUZHOU HANTE VISUAL TECH CO LTD
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  • Abstract
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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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  • Visual defect detection equipment and detection method thereof

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Embodiment Construction

[0035] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0036] In order to understand more clearly the technical solutions disclosed in the present invention, the following technical terms are now briefly explained.

[0037] Discriminant model: The discriminant model is similar to classification, and has a discriminant boundary, which is used to distinguish samples. From the perspective of probability, the probability that the obtained sample x belongs to category y is analyzed, which is a conditional probability P(yx).

[0038] Generative model: The generative model needs to genera...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G01N21/88
CPCG06T7/0004G01N21/8851G06T2207/20084G06T2207/20081G06T2207/30164G01N2021/8887
Inventor 胡华亮彭宏京陶淳牛双云利红平邓刚
Owner SUZHOU HANTE VISUAL TECH CO LTD
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