error: (-215:Assertion failed) !_src.empty() in function ‘cv::cvtColor’

cv2.error: OpenCV(4.6.0) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function 'cv::cvtColor'

Reason:

Path read error

Solution:

Original code

videos_src_path = "D:\pythonProject\python3.9\dataset\image\baozi_image\3.png"
frame = cv2.imread(videos_src_path)

Press the following to modify the read path

videos_src_path = "D:/pythonProject/python3.9/dataset/image/baozi_image/3.png"
#or  videos_src_path = r" D:\pythonProject\python3.9\dataset\image\baozi_image\3.png"
frame = cv2.imread(videos_src_path)