Camera and light
Where to sit and how to light your face so the SDK can read you.
Most tracking problems come from light. Set this up first.
Set up
- Light your face from the front. A lamp or a window in front of you works. Overhead or back light leaves your face in shadow.
- Keep the camera still. A laptop on a desk is ideal. Breathing cannot be read from a handheld camera.
- Keep your upper chest in view. The breathing signal comes from your chest.
- Be alone in the frame. Glint pauses if it sees more than one face.
The setup screen
After you agree to the camera, Glint shows a preview, the SDK's own hint, and a checklist:
| Item | Means |
|---|---|
| Face in view and well lit | The SDK has reported that all is fine for 1.5 seconds. |
| Eyebrows tracked | Face landmarks are arriving. |
| Breathing signal | The breathing trace is arriving. |
The board opens by itself once the first two are done. The hint is the SDK's exact wording, for example Increase light on face.
How long it takes
The first session of the day can take up to about a minute, mostly while the SDK loads its models. Later sessions start within a few seconds.
The breathing signal arrives within seconds but takes 30 seconds or more to become steady, which is the warming up badge on the board. Exhale detection works during that time too.
While you use it
If the SDK loses you, or the light drops, scanning pauses and a bar at the bottom shows the hint. It resumes by itself when the problem clears.