Setting up the app

Before we can get down to the nitty-gritty of our feature-matching algorithm, we need to make sure that we can access the webcam and display the video stream.

Let's learn how to run the application in the next section.

Running the app – the main() function routine

To run our app, we will need to execute the main() function routine. The following steps show us the execution of main() routine:

1. The function first accesses the webcam with the VideoCapture method by passing 0 as an argument, which is a reference to the default webcam. If it can not access the webcam, the app will be terminated:

import cv2 as cv
from feature_matching import FeatureMatching

def main():
    capture = cv.VideoCapture...