Triangle Shape Detector from Live Camera

This project uses OpenCV to detect a specific shape (a triangle) shown on a white paper in front of a live webcam.

🧠 Main Features:

• Uses cv2.matchShapes() to detect contours similar to a triangle.
• Adaptive thresholding + contour filtering based on size.
• Filters small noisy shapes.
• Designed for real-world use, where lighting and background are imperfect.

🔧 Input:

• A printed triangle shown on white paper.
• Live camera feed.

✅ Output:

• Green contour drawn on matching shapes in live video.
• Detection threshold and size filtering configurable.

📷 Detection Example:

📐 Template Used: