OpenCV 3 Computer Vision with Python Cookbook

How to do it...

You need to complete the following steps:

1. Import the modules:

import cv2import numpy as np

2. Generate a fourth degree polynomial equation:

N = 4coeffs = np.random.randn(N+1,1)

3. Find all the roots in the complex domain:

retval, roots = cv2.solvePoly(coeffs)

4. Check the roots:

for i in range(N):    print('Root', roots[i],'residual:',           np.abs(np.polyval(coeffs[::-1], roots[i][0][0]+1j*roots[i][0][1])))