corrosion image binarization processing method

The invention belongs to the field of metal material corrosion, and particularly relates to a corrosion image binarization processing method. The method comprises the following steps: 1, treating a test piece; 2, observing and shooting a corrosion pit microscopic topography map of the test piece through a video microscope; Step 3, reading the corrosion pit microscopic topography map of the test piece, and preprocessing the corrosion pit microscopic topography map by adopting a binarization method to generate a basic corrosion topography grey-scale map; 4, reading the basic corrosion morphologygrey-scale map, and processing the basic corrosion morphology grey-scale map by adopting an improved Otsu algorithm to generate a binary image; Wherein the improved Otsu algorithm is an Otsu algorithm in which edge information and gray scale information of the basic corrosion morphology gray scale map are added. The improved Otsu algorithm is adopted to further carry out binarization processing on the image, so that the