Verify a signature
Claim an identity and sign. Then try to forge it: trace the ghost outline slowly and watch what the timing gives away.
No strokes yet
Turn your phone sideways for more room to sign.
What gets compared
- Your attempt is resampled at 100 Hz, centred and scaled, so position and size do not matter.
- Every sample carries position, velocity, speed and direction. Dynamic Time Warping aligns the attempt with each enrolled signature and sums how far apart they are.
- Those distances are divided by how far the enrolled signatures are from each other. A consistent signer is held to a tight band; a loose one gets more room.
- A logistic model fitted on SVC2004 turns the result into a probability.