Control Screen Brightness with Hand Gestures Using Python (OpenCV + MediaPipe)

Control your screen brightness using just your hand — no keyboard or mouse required! In this beginner-friendly Python project, you’ll learn how to build a real-time gesture-controlled system using OpenCV, MediaPipe, and a webcam. By measuring the distance between your thumb and index finger, the script dynamically adjusts your screen brightness using the screen-brightness-control library (Windows only).

Perfect for Python beginners exploring computer vision, automation, or interactive projects!

✅ What’s Included:

• Clean, well-commented Python code
• Beginner-friendly function structure
• Works with most webcams and Windows displays
• Easy to modify for other gesture-based controls

💡 You’ll Learn How To:

• Track hand landmarks using MediaPipe
• Calculate finger distance using OpenCV and math
• Map that distance to brightness percentages
• Control brightness in real time