The 1.109 in 9.2 is the variance ratio of the shipped 4/6/13 stencil (45/408
pixels), not the sigma ratio the sentence attached it to, and the effect is a
bound attained on weak reflections, not uniform. The profile-fit background
term is (sum P/v / sum P^2/v)^2 var(b), matching the code; the undefined w is
gone. The 13.3 refit cut is N^2 times the model variance
(RotationScaleMerge.cpp), not N*sigma^2. The sigma floor is 1 count.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EFEJG6WBQv8th4UJFNe53N
leonarski_fandClaude Opus 5
14b79b0314
