What could be possible reason for ValueError

[pcakhilnadh]

Find contours for image, which will detect all the boxes

im2, contours, hierarchy = cv2.findContours(img_final_bin, cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)

ValueError: not enough values to unpack (expected 3, got 2)

[pcakhilnadh]

In openCV 4 it returns only two parameters So the line im2, contours, hierarchy = cv2.findContours(img_final_bin, cv2.RETR_TREE,cv2.CHAIN_APPROX_SIMPLE)

should be chnaged to

contours, hierarchy = cv2.findContours( img_final_bin, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)

6 closed