Python-OpenCV cv2 OpenCV Error: Assertion failed (scn == 3 || scn == 4) in unknown function, file ..\..\..\modules\imgproc\src\color.cpp

Question

I am trying to learn contours in python using cv2.

I tried the following code given in a tutorial guide:

import cv2
import numpy as np
from matplotli         


        

Answer 1

1st print ret. If it is showing false then your image is not taken properly. If it is showing True Try this command - sudo modprobe bcm2835-v4l2 Or in your /etc/modules file add bcm2835-v4l2 at the bottom.