Coal preparation plant flotation froth color feature extraction method capable of adapting to image brightness

The invention relates to the technical field of flotation, in particular to a coal preparation plant flotation froth color feature extraction method capable of adapting to image brightness, which comprises the following steps: S1, building an image acquisition system; s2, collecting a color image of coal slime flotation froth, and converting the color image into a grayscale image; s3, dividing all gray values in each foam image into a non-reflective area, a transition area and a reflective area, and obtaining the gray value in each class; s4, extracting the gray values of the reflective areas of all foams, and calculating the gray average value of the reflective areas; s5, calculating the relative gray scale of the non-reflective area of each foam; and S6, calculating the mean value, the standard deviation, the skewness and the kurtosis of the relative gray levels of the non-reflective areas of all the foams as color features. According to the color feature extraction method provided by the invention, the inf