Existing old wall defect area identification method, device and equipment and medium

The invention provides an existing old wall defect area identification method, device and equipment and a readable storage medium, and relates to the technical field of wall evaluation, and the method comprises the steps: obtaining an original image of an old wall, and converting the original image into a gray image through a weighted average method; calculating the gradient of each pixel point of the grayscale image to determine a retaining wall edge point so as to segment a retaining wall image; segmenting the retaining wall image according to a preset rule to obtain a plurality of areas, and performing fractal dimension calculation on each area to obtain fractal dimensions; screening out cracks and weeds from the plurality of areas according to the parting dimensions of the areas and a second threshold value; according to the method, the original image is converted into the HSV image, the HSV image is compared with the preset space threshold comparison table, the mud seepage area is obtained, and the metho