TusharSSurve/OpenCV ? reverse-engineered prompt

Build me a polished Python OpenCV project that feels like a little showcase of computer vision demos.

I want a simple app where I can open different mini tools from one place, then run them on my webcam, a photo, or a video. Include the kinds of things this repo is about, like face blur for privacy, color detection, virtual paint, live sketch, document scanning, contour detection, object detection and tracking, number plate detection, QR code and barcode scanning, hand gesture controls for brightness or volume, blink and drowsiness detection, face landmark and face alignment demos, and a few fun extras like the Chrome Dino game and angle finder.

Make it easy to understand, with clear buttons or menus, helpful labels on screen, and smooth real time results. If needed, look up current OpenCV and Python docs online so the code is up to date. I’d like it to feel clean, beginner friendly, and ready to run with simple setup instructions.