feat: correct uneven lighting and pick polarity automatically

Fit the background brightness from the photo border and subtract it, so
side-lit photos threshold cleanly. The clicked pixel (or, without a click,
the border) decides whether the piece is darker or lighter, replacing the
invert checkbox. Adds the MDF-on-wood-floor photo as a regression fixture.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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immortaly007andClaude Opus 5.5 committed 2026-10-15 15:12:16 +02:00
1 parent 41baa25a01
commit 55a25ba978
10 files changed
+135 -36

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