cv2.error: OpenCV(4.5.5) error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'

cv2.error: OpenCV(4.5.5) error: (-215:Assertion failed) !_img.empty() in function 'cv::imwrite'

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C++ opencv 解決OpenCV: terminate handler is called! The last OpenCV error is: Error: Assertion failed
C++ opencv 解決OpenCV: terminate handler is called! The last OpenCV error is: Error: Assertion failed
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