本文将持续记录opencv-python使用过程中出现的常见错误和解决方案。
1 window.cpp:1274: error: (-2:Unspecified error) The function is not implemented
该错误通常表现为连最基本的cv2.imshow都无法使用。报错内容为：window.cpp:1274: error: (-2:Unspecified error) The function is not implemented.
Traceback (most recent call last):
File “/home/data/PJS/test_bed/img_show.py”, line 18, in
cv2.imshow(‘img’, img)
cv2.error: OpenCV(4.5.3) /tmp/pip-req-build-9gwtlx3c/opencv/modules/highgui/src/window.cpp:1274: error: (-2:Unspecified error) The function is not implemented. Rebuild the library with Windows, GTK+ 2.x or Cocoa support. If you are on Ubuntu or Debian, install libgtk2.0-dev and pkg-config, then re-run cmake or configure script in function ‘cvShowImage’
解决方法：
import cv2
print(cv2.__file__)
#删除打印出来的cv2文件夹即可
#如果不行，卸载并重新安装opencv-python就可以了
2 error: (-215:Assertion failed) iDepth == CV_8U || iDepth == CV_8S in function 'cv::connectedComponents_sub1'
出现这个错误，通常原因是图像矩阵的元素不是整数，所以报的是数据格式相关的错误提示。
image = image.astype(np.uint8)
3 Linux下lib缺失
ImportError: libSM.so.6: cannot open shared object file: No such file or directory
apt-get install libsm6
ImportError: libXrender.so.1: cannot open shared object file: No such file or directory
apt-get install libxrender1
ImportError: libGL.so.1: cannot open shared object file: No such file or directory
apt install libgl1-mesa-glx
