imgtools.structural() marked a cell occupied when its grey exceeded an
absolute 10/255, and the WardenOS page background is grey 16: every cell
of every region read occupied and no structural check could ever fail
(#19). Occupancy is now grey deviating from the crop's own median by more
than DEVIATION_THRESHOLD, or edge energy above EDGE_THRESHOLD. Measured on
real captures: a switch knob left/right differs in 240 of 256 cells (was
0), a dark card reads its icon and text and nothing else. Every committed
reference is recaptured with flare-edge tools/flow-run-all.sh --capture.
qmp.py to_axis() truncated the pixel-to-axis conversion and LVGL's
evdev calibration truncates on the way back, so many pixels landed one
short (130 -> 5924 -> 129) and a tap could miss the control hit had just
confirmed at that pixel (#21). It now rounds up to the smallest axis value
that truncates to the requested pixel; test_qmp_drive.py asserts the round
trip for every pixel at three panel sizes.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N3G6m9Aw5RyVY4ZowtKzEj
