2 Commits

Include renames

Author	SHA1	Message	Date
x01dcandClaude Sonnet 5	5e26b86d03	feat(scans): randomize Fermat spiral sub-step offset (flOMNI/OMNY/LamNI) ... Restores the legacy spec behavior of drawing a fresh random offset (uniform in [0, step)) per call and shifting the sampling lattice by it before the FOV crop check -- decorrelates position-tied reconstruction errors that otherwise accumulate into ring artifacts across a ptycho-tomography series. Applied identically to all three generators (get_flomni_fermat_spiral_pos, get_omny_fermat_spiral_pos, get_lamni_fermat_spiral_pos), same scalar offset for x and y, matching the historical spec. New `seed` parameter (default None = fresh randomization) allows deterministic/reproducible calls. The four call sites that predict Fermat point counts ahead of a real scan (flomni.py/lamni.py's _expected_fermat_position_count(), tomo_params.py's _compute_fermat_positions_flomni/_lamni) now pin seed=0 so their own estimates stay reproducible across repeated calls; their docstrings note the real scan's count can differ by a point or two near the threshold due to the randomization. Updated the affected tests to compare against a matching seed=0 instead of an independent random draw. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Lx3KffiFyyDMKT8vvPENUW	2026-09-17 12:30:13 +02:00
x01dcandClaude Sonnet 5	ab1fdd9a19	docs(flomni): add plan for Fermat scan sub-step randomization fix ... Legacy spec code drew a fresh random offset per projection to shift the Fermat lattice phase before FOV cropping (mitigates ptycho-tomo ring artifacts). None of the current BEC Fermat spiral generators (flOMNI, OMNY, LamNI) draw this offset -- all three are fully deterministic. Plan only, not implemented; applies identically across all three setups. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Lx3KffiFyyDMKT8vvPENUW	2026-09-17 12:19:37 +02:00