This project is a real-time hand gesture-based calculator that lets users input and evaluate mathematical expressions using only hand gestures. Designed for accessibility, and computer vision practice, it translates hand signs into digits, operators, and commands.
- Real-time gesture detection using webcam
- Supports multi-digit input (e.g., showing 2 → 4 → 7 becomes "247")
- Gesture-controlled arithmetic operations (
+,-,*,/) - Built-in evaluation and result display
- Hands-free Clear, DELETE and Exit commands
- Works using a standard webcam (no special hardware needed)
| Tool | Purpose |
|---|---|
| Python | Core programming language |
| OpenCV | Video capture, frame rendering |
| MediaPipe | Hand landmark detection (21 points) |
| NumPy | Distance computation, math logic |
| Gesture | Function |
|---|---|
| 1–5 fingers (one hand) | Digits 1–5 |
| 5 + 1-4 fingers(both hands) | Digits 6-9 |
| Only one hand with 0 fingers | Digit 0 |
| 1 finger on both hands | + (add) |
| 1 + 2 fingers | - (subtract) |
| 1 + 3 fingers | * (multiply) |
| 1 + 4 fingers | / (divide) |
| Both hands with 0 fingers | = (evaluate) |
| Both hands with 5 fingers | Clear input |
| Both hands 2 fingers | Delete input |
| Right index < left index (spatial) | Exit program |
Gestures are detected based on hand landmark positions and finger states.