这个报错一般是因为你图像的路径写错了，找不到图像而导致的。
解决问题的朋友麻烦点个推荐呗！嘿嘿
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Python中使用Opencv报错 error: (-215:Assertion failed) !_src.empty() in function ‘cv::cvtColor‘
工具配置- error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
解决-215:Assertion failed ) !_src.empty() in function 'cv::cvtColor'(java opencv)
cv2.error: OpenCV(4.2.0) ..\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
解决cv2.error: OpenCV(4.1.1) C:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'
Opencv 解决问题 !_src.empty() in function 'cv::cvtColor'
运行报错error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'
error: (-215:Assertion failed) size.width>0 && size.height>0 in function 'cv::imshow'
OpenCV Error: Assertion failed (scn == 3 || scn == 4) in cv::cvtColor
解决error: (-215:Assertion failed) VScn::contains(scn) && VDcn::contains(dcn) && VDepth::contains(depth) in function 'cv::CvtHelper的一种可能