Assertion failure : size.width>0 && size.height>0 in function imshow

Question

i am using opencv2 and python on raspberry pi. and i am new with python and opencv. i tried to read a jpeg image and display image it shows the following error:

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Answer 1

Use r in the code where you specified the file address.
For Example:

import cv2
img = cv2.imread(r'D:\Study\Git\OpenCV\resources\lena.png')
cv2.imshow('output', img)
cv2.waitKey(0)

r stands for "raw" and will cause backslashes in the string to be interpreted as actual backslashes rather than special characters.