Current sample
Questions — all vs the LEAD shoulder
Skip (S, then reason)
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Overview
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, three questions per frame — all judged
against the lead shoulder.
1/2/3 answers the highlighted question; the third answer
saves & advances.
Revisiting a labeled frame shows its answers in green — click a
different option to change it; that one click re-saves &
moves on.
Hover the frame for a guide cross — the horizontal line
checks height, the vertical line checks front-to-back.
Esc = restart this frame's answers.
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.