📐 Henjoy Reference Marker
Place Your Hand Next to
This Marker & Take a Photo
This Henjoy marker is displayed at an exact 50 mm size on your screen. It serves as the known-scale reference for hand measurement via OpenCV and MediaPipe.
1
Open hand flat
Spread fingers naturally next to this marker on your screen.
2
Take a top-down photo
Shoot from above, capturing both the marker and your full hand.
3
Upload for measurement
Our system detects the marker, calculates scale, and measures your hand.
50 mm × 50 mm — ArUco 4×4 ID 0
🚫
Screenshots & saved images won't be the correct 50 mm size! Use this marker directly on screen only.