A detection method based on nonlinear transformation, computer equipment and storage medium

Abstract

The invention relates to the technical field of visual inspection, in particular to a non-linear transformation-based detection method, computer equipment and storage medium, wherein the detection method comprises the following steps: image acquisition, oblique lighting on a carbon fiber cloth surface, and facing the carbon fiber cloth Take pictures of the surface to obtain the cloth surface image; image preprocessing, logarithmically transform the cloth surface image to obtain the preprocessed image; continuous gray area extraction, divide the preprocessed image into several initial rectangular areas, and calculate each The average gray value of the initial rectangular area, the adjacent initial rectangular areas whose average gray value difference is less than the first threshold are merged, and several continuous gray areas are obtained; the black and gray areas are extracted, and the value of each continuous gray area is calculated. Average gray value, if the average gray value is less than the second threshold, the continuous gray area is a black and gray area. In the present invention, the black and gray areas are better distinguished from the cloth surface, so that the black and gray areas are selected, and visual recognition is realized.

Description

technical field [0001] The present invention relates to the technical field of visual detection, and in particular, to a detection method based on nonlinear transformation, computer equipment and storage medium. Background technique [0002] As a hybrid composite material board, carbon fiber is widely used in new energy vehicles, aerospace, rail transit and other fields. In the production and processing process of carbon fiber, monitoring and analysis are required to ensure production quality. In the process of carbon fiber production, cloth There will be some black ash falling on the surface, which will affect the production quality of the cloth. [0003] However, since the background of carbon fiber is black, and the black and gray are also black, the color difference between the two is small, so it is difficult to detect the black and gray on the cloth by visual detection. There is no visual detection method in the prior art. method to detect black and gray. [0004] In...

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Problems solved by technology

[0003] However, because the background of carbon fiber is black, and the black ash is also black, the color difference between the two is small, so it is difficult to detect the black and ash on the cloth surface through the method of visual detection. There is no visual detection method in the prior art. method to detect black ash

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