⚠️ Archived — not in active use. This is the old tucked / level / air chin labeler, kept only to check John's answers every now and then. Please don't label here — active chin labeling happens in the chin-shoulder labeler.
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Verdict

Judge the chin: 1 tucked · 2 level · 3 in the air.

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Progress

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Overview

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Conventions

Videos come in a fixed order; the next one starts automatically when one is done. Frames load from the server — no video files needed (a video without hosted frames asks for its local file).
One still frame at a time.
1/2/3 = tucked / level / in the air — saves & advances.
Ctrl/Cmd+scroll (or pinch) = zoom · drag = pan · double-click = reset zoom.
While zoomed, each new sample re-centers on the chin.
←/→ = peek at neighboring frames.
R = back to the sampled frame.
U = clear this sample's saved label.
S then 1/2 = skip (occluded / unclear).
Esc = cancel the skip menu.

Judge the chin at the shown frame. Tucked = chin pulled down toward the chest. Level = jaw roughly parallel to the ground — neither tucked nor lifted. In the air = chin lifted, jaw pointing up.
Shortcuts: 1/2/3 = tucked / level / air  |  Ctrl/Cmd+scroll = zoom  |  drag = pan  |  dbl-click = reset zoom  |  ←/→ = ±1 frame  |  R = back to sample  |  Esc = cancel skip  |  U = clear label  |  S = skip  |  N = Next  |  P = Previous  |  F = First  |  G = Next unlabeled v8