opencv轮廓周长原理_opencv 图像轮廓特征 图像面积,轮廓周长,外接矩形、最小外接矩形、最小外接圆、拟合椭圆...
找出图像轮廓contours, hierarchy = cv.findContours(thresh, 3, 2)画出图像轮廓cnt = contours[1]cv.drawContours(img_color1, [cnt], 0, (0, 0, 255), 2)计算轮廓面积area = cv.contourArea(cnt) #cnt:轮廓print(area)计算轮廓周长perimeter...