The adaptive finder keeps (local test & ring threshold), so the local test's
second pass is only wanted at the ring pixels. Its window there is the first
pass's window with the first pass's strong pixels taken out, and those are
few: the first pass now records its window sums at the ring pixels, and the
second pass subtracts the strong pixels in each window instead of sweeping
the whole image again. Integer sums and the same acceptance test (factored
into StrongInWindow), so the bits are exactly the dense pass's.
CPU-only rotation run of a 16M set: md5-identical output, 262 -> 242 s.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D1G8gJVAy6gp1K5Dz3NE5C
leonarski_fandClaude Opus 5.5
50098d20ba