Handraw

Project Structure

HANDRAW/
├── camera/
│   ├── captures/           
│   ├── drawing.py         
│   └── hand_landmarker.task 
└── README.md

Demo

Install

pip install opencv-python opencv-contrib-python mediapipe numpy

How to run

python cam_draw.py

Controls

Hand Gestures

Gesture	Action
☝️ Index finger up	Draw
✌️ Index + middle finger up	Erase
✊ Closed hand	Idle

Hand Landmarks

MediaPipe detects 21 landmarks on each hand, numbered 0 to 20:

Group	Landmarks	Description
Wrist	0	WRIST
Thumb	1-4	CMC -> MCP -> IP -> TIP
Index finger	5-8	MCP -> PIP -> DIP -> TIP
Middle finger	9-12	MCP -> PIP -> DIP -> TIP
Ring finger	13-16	MCP -> PIP -> DIP -> TIP
Pinky	17-20	MCP -> PIP -> DIP -> TIP

Each finger has 4 points: base knuckle (MCP), middle knuckle (PIP), upper knuckle (DIP), and fingertip (TIP).

Keyboard

Key	Action
1 – 9	Switch color (green, blue, pink, orange, white, ...)
+ / -	Decrease / increase brush size
C	Clear board
S	Save screenshot to captures/
Tab	Toggle HUD
Q / Esc	Quit

Credits

• MediaPipe by Google
• OpenCV by OpenCV.org (open-source community)