OpenCV 4 with Python Blueprints - Second Edition

Running the application

As we have seen in the previous chapters with a wxpython GUI, in order to run this app (chapter8.py), we need to set up a screen capture by using cv2.VideoCapture, and pass the handle to the FaceLayout class. We can do this by following the next steps:

1. First, we create a run_layout function that will work with any BaseLayout subclass, as follows:

def run_layout(layout_cls, **kwargs):    # open webcam    capture = cv2.VideoCapture(0)    # opening the channel ourselves, if it failed to open.    if not(capture.isOpened()):        capture.open()    capture.set(cv2.CAP_PROP_FRAME_WIDTH, 640)    capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)    # start graphical user interface    app = wx.App()    layout = layout_cls(capture, **kwargs)    layout.Center() layout.Show() ...