Product recognition demo for supermarket shelf images
4ce41ecb17
A still replayed as frames gave every frame the same boxes, so the live path
never saw a track move. /v1/samples/{id}?pan=N now returns a portrait 720x1280
window slid N*PAN_STEP pixels along the sample, reversing at each edge, at the
frame size and JPEG quality the phone sends.
The decoded image is cached by (mtime, size): re-reading a 1500x2000 JPEG per
frame cost more than the encode and made the walk slower than PAN_STEP says.
Measured after the cache: 3.3 ms mean per panned frame, 301 frames/s ceiling.
Two tests, both verified to fail before the change.
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| recognization | ||
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