Python error when calling cv2.findContours: ValueError: not enough values to unpack (expected 3, got 2)

Others 2019-12-05 12:28:59 views: null

OpenCV legacy, returns three parameters:

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

To return three parameters :

3.4.3.18 The OpenCV downgrade it to enter pip install opencv-python == 3.4.3.18 terminal

The new OpenCV calls, returns two parameters :

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

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Origin www.cnblogs.com/liuwenhua/p/11988351.html

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