OpenCV 4 with Python Blueprints - Second Edition

Running the app and main function routine

The chapter2.py script is responsible for running the app, and it first imports the following modules:

import cv2import numpy as npfrom gestures import recognizefrom frame_reader import read_frame

The recognize function is responsible for recognizing a hand gesture, and we will compose it later in this chapter. We have also placed the read_frame method that we composed in the previous section in a separate script, for convenience.

In order to simplify the segmentation task, we will instruct the user to place their hand in the center of the screen. To provide a visual aid for this, we create the following function:

def draw_helpers(img_draw: np.ndarray) -> None: # draw some helpers for correctly placing ...