opencv-proto 0.3.0

Color Palette

Let’s replace 37 lines of source code from Trackbar as the Color Palette tutorial with ocvproto-based implementation:

from ocvproto.toolbox import WindowManager, Canvas

with WindowManager() as wm:
    rgb = wm.window.add_trackbar_group(['R', 'G', 'B'], max=255)
    for _ in wm.app.loop():
        wm.set_frame(Canvas(512, 300, color=rgb))

Camera capture

Now let’s capture video camera stream into ocvproto.avi file, being able to adjust blur.

Let’s also setup config filepath (ocvproto.json) - this allows us to store current trackbar values (s key) and load them (r key). It is useful to restore settings between sessions.

We bind z key to take camera shots.

from ocvproto.toolbox import WindowManager, Camera

with WindowManager() as wm:

    wm.app.set_config('ocvproto.json')

    blur = wm.window.add_trackbar_group(['x', 'y'], 'Blur', default=1)

    with Camera() as cam:
        wm.app.bind_key('z', cam.dump_image)

        for _ in wm.app.loop():
            cam.read()
            cam.blur(blur)
            cam.dump()
            wm.set_frame(cam)

Read the documentation.