Digital Notes With Any Pen on Any Surface

Watch the video demo:

Requirements

OpenCV
numpy

To run the program:

python3 pen_tracking.py

Instructions

1. Use green masking tape on the corners of an A4 paper

2. Tape the tip of a pen or pencil with the same masking tape.
3. Run python3 pen_tracking.py
4. Calibrate. Close the laptop lid so that the four corners of the paper is in view and have coordinates attached to them. Press Q to confirm calibration and move the paper away.

5. Now you can start drawing and taking notes. Press Q to quit. Press C to clear canvas.