Python Machine Learning Cookbook - Second Edition

How to do it...

Let's see how we can build a Star feature detector:

1. Create a new Python file and import the following packages (the full code is given in the star_detector.py file that is provided for you):

import sys 
import cv2  

2. Define a class to handle all the functions that are related to Star feature detection:

class StarFeatureDetector(object): 
    def __init__(self): 
        self.detector = cv2.xfeatures2d.StarDetector_create() 

3. Define a function to run the detector on the input image:

    def detect(self, img): 
        return self.detector.detect(img) 

4. Load the input image in the main function. We will use table.jpg:

if __name__=='__main__': 
    # Load input image -- 'table.jpg' 
    input_file = sys.argv[1] 
    input_img = cv2.imread(input_file) 

5. Convert the ...