Modifying the application

Now that we have high-level functions and classes for several filters, it is trivial to apply any of them to the captured frames in Cameo. Let's edit cameo.py and add the lines that appear in bold face in the following excerpt:

import cv2
import filters
from managers import WindowManager, CaptureManager

class Cameo(object):
    
    def __init__(self):
        self._windowManager = WindowManager('Cameo',
                                            self.onKeypress)
        self._captureManager = CaptureManager(
            cv2.VideoCapture(0), self._windowManager, True)
        self._curveFilter = filters.BGRPortraCurveFilter()
    
    def run(self):
        """Run the main loop."""
        self._windowManager.createWindow()
        while self._windowManager.isWindowCreated:
            self._captureManager.enterFrame()
            frame = self._captureManager.frame
            
            # TODO: Track faces (Chapter 3).
            
            filters.strokeEdges(frame, frame)
            self._curveFilter.apply(frame, frame)
            
            self._captureManager.exitFrame()
            self._windowManager.processEvents()
    
    # ... The rest is the same as in Chapter 2.

Here, I have chosen to apply two effects: stroking the edges and emulating Portra film colors. Feel free to modify the code to apply any filters you like.

Here is a screenshot from Cameo, with stroked edges and Portra-like colors: