ValueError: not enough values to unpack (expected 3, got 2) using Contour in OpenCV

Question

So I am getting this error after i updated all the packages.

    <ipython-input-48-e9a9716d4b8c> in extractText(path)
     15     plt.show()
     16 
---> 17     img, contours, hierarchy = cv2.findContours(edged, cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE)
     18     contours = sorted(contours, key=cv2.contourArea, reverse=True)
     19 

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

score 4 · Accepted Answer · answered Jan 30 '19 at 07:34

4

In openCV4, cv2.findContours() returns 2 values contours, hierarchy, so it should be:

contours, hierarchy = cv2.findContours(edged, cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE)

answered Jan 30 '19 at 07:34

Ha Bom

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ValueError: not enough values to unpack (expected 3, got 2) using Contour in OpenCV

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