cv2 open blank window

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cv2 open blank window

By Double Wooden Hammer Manuel Prohaska at Jan 14 2021

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_,cont,hei = cv2.findContours(d_img,cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE) ValueError: not enough values to unpack (expected 3, got 2)

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from .cv2 import * ImportError: /home/pi/.local/lib/python3.7/site-packages/cv2/cv2.cpython-37m-arm-linux-gnueabihf.so: undefined symbol: __atomic_fetch_add_8

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