Question

您好我是Python的新手，我正在尝试获取图像中的边界矩形。我做了以下事情：

import cv2 
from skimage import io
import numpy as np
img = cv2.imread('artelab.jpg',0)
ret,thresh = cv2.threshold(img,127,255,0)
im2,contours,hierarchy = cv2.findContours(thresh, 1, 2)
cnt = contours[0]
M = cv2.moments(cnt)
print M
rect = cv2.minAreaRect(cnt)
box = cv2.boxPoints(rect)
box = np.int0(box)
cv2.drawContours(img,[box],0,(0,0,255),2)

没有显示但我没有收到错误消息。有什么问题？

Answer 1

添加for循环后，我获取了所有对象周围的边界框。谢谢

import cv2
from skimage import io
import numpy as np

img = cv2.imread('paper_artelab.jpg',0)
ret,thresh = cv2.threshold(img,127,255,0)
im2,contours,hierarchy = cv2.findContours(thresh, 1, 2)
numbContours=contours.__len__()

for x in range(0,numbContours):
    cnt = contours[x]
    rect = cv2.minAreaRect(cnt)
    box = cv2.boxPoints(rect)
    box = np.int0(box)
    cv2.drawContours(img,[box],0,(0,0,255),2)
io.imshow(img)

cv2.drawContours为什么没有出现？

1 个答案: