SolveScaleIRLS returns whatever it converged to and both writers accept any
G > 0, so a fit that collapsed to ~1e-3 multiplies that image's intensities by
a thousand. Nothing downstream notices, because the sigmas are multiplied by the
same factor and the merge's n-sigma outlier test is therefore blind to it - only
a total collapse self-heals, by overflowing corr to inf.
The rotation path refuses a per-frame scale this far below its neighbours; the
stills path had no guard. Judge each image against the median of the images that
did scale, and put a collapsed one back to G = 1 - the same state as an image
with too few reflections to fit.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5
3e8a994d2e