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

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

操作

# 找出所有轮廓
binary,contours, hierarchy = cv.findContours(binary, cv.RETR_EXTERNAL, cv.CHAIN_APPROX_NONE) 

报错信息

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

解决办法

查看版本
pip list
opencv-python  4.4.0.42

# 切换版本
pip install opencv-python==3.4.3.18 -i https://pypi.douban.com/simple


Installing collected packages: opencv-python
  Attempting uninstall: opencv-python
    Found existing installation: opencv-python 4.4.0.42
    Uninstalling opencv-python-4.4.0.42:
      Successfully uninstalled opencv-python-4.4.0.42
Successfully installed opencv-python-3.4.3.18 

opencv 降版本就完了，虽然麻烦，但好使

本文地址：https://blog.csdn.net/weixin_41194171/article/details/108264669