Color Detection

Small OpenCV notebook for detecting a target color from a webcam stream.

Setup

• Python 3.9+
• numpy, opencv-python, Pillow

Install:

pip install numpy opencv-python Pillow

Usage

1. Open ColorDetection.ipynb.
2. Run the first cell to define get_limits().
3. Run the webcam cell.
4. Press q or close the window to exit.
5. Change the color if wanted, the format is BGR

Notes

• On macOS, cv2.CAP_AVFOUNDATION is used for stability.
• On Windows or Linux, you can switch to cv2.VideoCapture(0) or a platform-specific backend (e.g., CAP_DSHOW or CAP_V4L2).

Recent changes

• get_limits() now handles hue wrap-around (needed for red) and supports tuning hue_tol, sat_min, and val_min.
• The webcam loop combines multiple HSV ranges (for red) and applies a light morphology + contour area filter to reduce false positives.