2 Commits

Author	SHA1	Message	Date
Thomas Ales	d5914b5793	Stop discarding precomputed FFT data on view switches ... The display path hardcoded row_avg_n=0 when checking a file's stored FFT cache, since the main window has no row-averaging control (only the batch-only RowAverageFftOptionsDialog). Once a file was batch-computed with row-averaging, every view switch saw a phantom provenance mismatch and silently launched a full raw recompute, discarding the precomputed data. The display now asks for the stored image at the settings it was actually computed under (bg-sub/pad/row-averaging), rather than the window's live controls, so a stored or already-computed image is always shown once present. Those controls now only affect a first-time compute for an uncached angle or an explicit batch recompute -- never what's already on screen. DC threshold is unaffected: it stays live, since re-masking a cached image is free. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>	2026-08-09 18:21:34 -05:00
Thomas Ales	3989c2a1b8	Implement row-averaged FFT feature for same-row SNR cleanup ... Add row-averaged FFT feature with configurable window size (row_avg_n parameter) for improved signal-to-noise ratio on noisy scans. Includes: - Gaussian-weighted same-row neighbor averaging (never crosses rows) - Masked/renormalized convolution handling for edge cases and masked samples - Cache format v2 with row_avg_n tracking to prevent silent cache mismatches - GUI dialog option for row-average window configuration - Comprehensive tests validating kernel properties, background subtraction invariance, and cache dispatch Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>	2026-08-07 21:50:05 -05:00