Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Importing modules

From the Python standard library, we will use the math module for trigonometric calculations, and the timeit module for accurate time measurement (which will enable us to use a Kalman filter more effectively). As usual, we will also use NumPy and OpenCV. Thus, our implementation of ImageTrackingDemo.py begins with the following import statements:

import mathimport timeitimport cv2import numpy

Now, let's proceed to the implementation of the helper functions.