2019.5.23ValueError: not enough values to unpack (expected 3, got 2)

python调用cv2.findContours时报错:ValueError: not enough values to unpack (expected 3, got 2)
OpenCV旧版,返回三个参数:

im2, contours, hierarchy = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
要想返回三个参数:

把OpenCV 降级成3.4.3.18 就可以了,在终端输入pip install opencv-python==3.4.3.18

OpenCV 新版调用,返回两个参数:
第一个参数是图象

contours, hierarchy = cv2.findContours(mask, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

作者:醉雨轩Y
来源:CSDN
原文:https://blog.csdn.net/miao0967020148/article/details/88623631
版权声明:本文为博主原创文章,转载请附上博文链接!

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