(center(x,y), (width, height), angle of rotation) = cv2.minAreaRect(points)

返回的x，y如果用numpy对原图索引，需要反过来并且取整

其中w指的成了人视觉上图像上下方向的高

binarymask[x:x+w,y:h+y]=0 #错

binarymask[int(y):int(h+y)+1,int(x):int(x+w)+1]=0 #对