The texture characteristics of fabrics mainly include roughness, structural characteristics, periodicity, directionality, continuity, etc. In the research of automatic detection of fabric defects, the gray-scale statistical characteristics of fabric texture image are often used to determine whether the defects exist after comparing with fabric texture characteristics [24]. In this paper, we mainly choose four characteristic values: entropy, energy, extremum and variance, which are relatively simple, easy to realize and have good effect. Set as the gray value at the image pixel point, m as the number of rows of the image, n as the number of columns of the image, and as the average gray value of the image. The definition formula of the four characteristic values is as follows:<br>
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