Answers for "error: opencv(4.4.0) /tmp/pip-req-build-99ib2vsi/opencv/modules/imgcodecs/src/loadsave.cpp:738: error: (-215:assertion failed) !_img.empty() in function 'imwrite'"

Whatever

cv2.error: OpenCV(4.5.3) C:UsersrunneradminAppDataLocalTemppip-req-build-q3d_8t8eopencvmodulesimgprocsrccolor.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Try Giving Full Path. 
This seems to be the path issue in windows. 
I changed it to a full path like this and it worked.

filename = "D:SandboxGithubopencv-projectResourcesPhotoscats.jpg"

Posted by: Guest on July-29-2021