OpenCV 3 Computer Vision with Python Cookbook

How to do it...

You need to complete the following steps:

1. Import the necessary modules:

import cv2import matplotlib.pyplot as plt

2. Load the test image:

img = cv2.imread('../data/Lena.png', cv2.IMREAD_GRAYSCALE)

3. Find good keypoints:

corners = cv2.goodFeaturesToTrack(img, 100, 0.05, 10)

4. Visualize the results:

for c in corners:    x, y = c[0]    cv2.circle(img, (x, y), 5, 255, -1)plt.figure(figsize=(10, 10))plt.imshow(img, cmap='gray')plt.tight_layout()plt.show()