Method for detecting rolling damage of anticorrosive coating of cable bridge

The invention relates to the field of image processing, in particular to a method for detecting rolling defects of an anticorrosive coating of a cable bridge. The method comprises the following steps: collecting a gray level image of a board, establishing a gray level histogram, and taking all pixel points exceeding a threshold value in the gray level histogram as abrupt change pixel points; acquiring a plurality of mutation regions according to all mutation pixel points, calculating slopes of all edge pixel points in each mutation region, and calculating a first detection index of each mutation region; acquiring a pixel point with the same gray level as the pixel point in each neighborhood direction in each abrupt change area, and calculating a second detection index of each abrupt change area according to the distance between each pixel point in each abrupt change area and the pixel point with the same gray level in each neighborhood direction; and establishing a defect detection index, and performing defec