Take the Photo
Hand photo on floor with credit card
Review & Adjust
Hand detection bounding boxes Finger keypoint annotation
Get Your Edge
CAD model render Edge in use

How it works

Take the Photo
Hand photo on floor with credit card
Review & Adjust
Hand detection bounding boxes Finger keypoint annotation
Get Your Edge
CAD model render Edge in use

Upload Hand Photo

You
  1. Place a credit-card-sized card on a horizontal surface (do not show any sensitive information).
  2. Place a single hand flat near the card, without touching it.
  3. Keep fingers close, with a small gap between the fingertips, palm facing up.
  4. Make sure all 4 fingers are flat — all joints and tips in contact with the surface.
Helper
  1. Hold the phone roughly 1 m above the hand, parallel to the surface, centered on the hand.
  2. Use a flash. If you don't see the creases in the photo, the software won't either.
Tips for a good photo ▸
  • Use your phone's highest-resolution camera (12 MP+).
  • Avoid notched or irregularly shaped cards.
  • Exact distance is not critical, focus on keeping the phone parallel and centered.
  • Prefer optical zoom — avoid digital zoom.
Good pose

✓ Good

Bad pose

✗ Bad

or try with an example

No upload needed · uses a sample hand photo

Training Protocols

Open Hand Finger Position

  • Distal Phalanx (tip): Horizontal
  • Middle Phalanx: 45° angle
  • Proximal Phalanx (base): Vertical
  • Poor form may allow heavier weight but increases injury risk and reduces FDP isolation.

Crimp Finger Position

  • Proximal Phalanx (base): Vertical
  • Middle Phalanx: Close to horizontal

Training Protocol

  • Volume: 3 sets of 30–240 seconds.
  • Onboarding: Start slowly without reaching failure to allow for adaptation.
  • Chalk: Do not use chalk. The device limits friction importance — slipping means you can't maintain proper form.

Open Hand Troubleshooting

  • Crimp Compensation: If a finger shifts to crimp, reduce intensity and focus on form.
  • Pinky Curling: Usually caused by over-flexing other fingers. Try moving the pinky laterally along the edge.
Initializing…

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