Introduction - If you have any usage issues, please Google them yourself
Because the texture is formed by the repeated appearance of the gray distribution in the space position, there will be a certain gray relation between the two pixels apart from a certain distance in the image space, that is, the spatial correlation characteristic of the gray level in the image. Gray level co-occurrence matrix is a commonly used method to describe texture by studying the spatial correlation properties of grayscale.
Gray-level co-occurrence matrix from an image
Grayscale symbiotic matrix of images