So, now we have arrived at the best combination out of all the combinations that we have discussed so far. This algorithm came out of the OpenCV Labs. It's fast, robust, and open-source! Both SIFT and SURF algorithms are patented and you can't use them for commercial purposes. This is why ORB is good in many ways.
If you run the ORB keypoint extractor on one of the images shown earlier, you will see something like the following:
Here is the code:
import cv2 import numpy as np input_image = cv2.imread('input.jpg') gray_image = cv2.cvtColor(input_image, cv2.COLOR_BGR2GRAY) # Initiate ORB object orb = cv2.ORB() # ...