中文说明：缺陷识别m文件，对缺陷图像进行中值，小波去噪，利用数学形态学方法提取二进制图像轮廓，并计算裂纹等缺陷的面积和周长
English Description：
Defect recognition m file, the median value of the defect image, wavelet de-noising, using mathematical morphology method to extract binary image contour, and calculate the area and perimeter of cracks and other defects