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Artificial Intelligence · Mini Project
Air Canvas: Draw with Hand Gestures
Paint on screen by moving a fingertip in the air in front of a webcam
1-2 weeks build
Overview
The index fingertip becomes a brush. MediaPipe finds the hand, a simple finger-up rule switches between drawing and selecting, and strokes are smoothed and composited onto a canvas layer over the live feed. A header bar lets you pick colours, change brush size, erase and save the drawing as an image.
What makes it stand up
- 01Fingertip tracking with a draw mode and a hover-to-select mode
- 02Stroke smoothing so lines do not jitter with the camera
- 03Colour palette, brush sizes, eraser and clear-canvas controls
- 04Canvas layer blended over the video with bitwise masking
- 05Save drawings to PNG with a timestamped filename
Module breakdown
- 01
Hand tracking
MediaPipe Hands with fingertip and knuckle landmarks.
- 02
Mode logic
Finger-up detection that switches between drawing and selecting.
- 03
Brush engine
Moving-average smoothing and line interpolation between frames.
- 04
Toolbar
On-screen colour, size and eraser buttons triggered by hovering.
- 05
Compositing
Mask-based overlay of the canvas onto the camera frame.
After this, you will be able to
- Explain how the finger-up rule is computed from landmarks
- Walk through the masking maths that blends canvas and video
- Draw a labelled diagram live during the viva
Technology stack
- Python
- OpenCV
- MediaPipe
- NumPy
- Level
- Mini Project
- Domain
- Artificial Intelligence
- Build time
- 1-2 weeks
- Difficulty
You receive
- Complete, commented source code
- 60-90 page project report (IEEE format)
- Editable presentation deck
- Architecture, ER and UML diagrams
- Local setup and deployment guide
- Sample dataset or seed data
- Viva question bank with answers
- One 45-minute walkthrough call
- 30 days of doubt-clearing support