Live Camera
1) Start camera → choose camera if needed →
2) Capture reference → move your head / object.
If cosine looks too dark: enable Auto-scale or increase Heat gain, or switch to abs diff.
Cosine distance is often tiny (e.g. 0.001). Auto-scale maps the current frame’s P95 distance to white.
Heatmap + Stats
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cosine: d = 1 - (rgb·rgb0) / (||rgb||·||rgb0||)
abs diff: d = mean(|rgb-rgb0|) / 255
Auto-scale uses current P95 as “white”. Manual gain uses v = d * 255 * gain.
Camera list shows names only after the first permission grant (browser privacy).