Improve recognition
SignVox's letter model was trained on photos of other people's hands. Your hand, your camera and your light are different, so some letters may be missed or confused. Improve Recognition lets you show SignVox how you make each letter. It then blends what it learned about your hand into its guesses.
Whether this helps measurably for real users has not been measured yet. Try it on the letters that give you trouble.
Teach a letter
Open Settings and select Improve Recognition (Teach this phone your own hand).
Choose a letter you want to improve.
Under the camera, a line shows how much SignVox knows about your hand for that letter, such as E — not personalised yet.
Make the handshape for that letter in front of the camera and select Teach with the letter, such as Teach E.
While it records, the button reads Capturing…. Prompts such as Hold the letter naturally, Tilt your hand slightly and Move a little closer help you give it some variety.
Repeat a few times for the same letter. The line updates, for example E — 12 samples learned (weight 40%).
Repeat for other letters you have trouble with.
How much it counts
Your samples never fully replace the built-in model. The more samples you give a letter, the more they count, up to an equal share with the built-in model at about 30 samples. This way a few careless samples cannot ruin a letter.
Turn it off or reset it
- To stop using your samples without deleting them, turn off Personalised Recognition in Settings.
- To delete everything SignVox has learned about your hand, open Improve Recognition, select the reset button (Reset personalisation) and confirm with Reset. This cannot be undone.
Other settings that help
| Setting | When to change it |
|---|---|
| Letter Hold Time | Raise it if letters are added before you are ready. Lower it if you have to hold each letter too long. The default is 350 ms. |
| Left-Handed Mode | Turn on if you sign with your left hand. |
| Auto-Correct Words | Leave on to fix words that are one letter off a common English word. |
Privacy
What SignVox learns is stored as compact measurements of your hand in a file on the phone. No photos are kept, and nothing is uploaded: the app has no network permission.