add com/dpc imaging modes to show4dstem#121
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henryhng
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Apr 22, 2026
henryhng
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- Add 6 center-of-mass virtual imaging modes that compute beam deflection maps from 4D-STEM dat:
- com-x/com-y
- com magnitude
- iCOM - integrated COM via Fourier-space Poisson solver, recovers projected electrostatic potential
- dCOM - divergence of COM field
- curl (EM)
- Corresponding tests
- Rewrite show4dstem all_features notebook data generator to simulate SrTiO3 perovskite crystal (atomic potential gradient & BF disk shift, Bragg spots, thickness modulation) to achieve clearer/more obvious visualisations
…cker with roi/snap/undo, convert coordinates to (row, col), add dataset integration
…ll widgets with fft filtering, line profiles, export figures, state persistence, canvas resize, mps gpu fallback
…re-saved widget state
…r interactive docs
improve `Show4DSTEM` drag, support 5DSTEM, use `Self`
- Remove duplicate zoom.toFixed(1)× Typography elements (keep only overlay canvas one) - Add pixel_size=result.pixel_size to manual push notebook cell - Add pixel_size=0.1861 to Live.watch notebook cell - Scale bar will render when pixel_size > 0
…lers Show2D + Show3D: - Truthful render_total_ms via JS→Python _js_rendered trait (matches real wall clock, not just __init__); removes misleading 'N ms' print that hid _repr_mimebundle_ + comm + JS time. - _repr_mimebundle_ matplotlib fallback gated behind QUANTEM_WIDGET_STATIC_FALLBACK. - _apply_rotations no-op fast path for all-zero init case. - canvas_size renamed to size; kwargs hardener rejects typos + legacy names with a helpful message. load_state_dict silently migrates old keys. - Docstring + summary() now surface render_total_ms + build/wire/js subsets. Infra: - enable_hmr() background watcher launches 'npm run dev' from any notebook. - Two new E2E profilers land in tests/ (test_e2e_timing_truthful, test_e2e_scrub_profile) — CI workflows to run them are in a follow-up commit that needs workflow-scope push. - tests/conftest passes notebook via ?reset so JupyterLab opens in the foreground tab (was racing behind earlier tabs). - Widget notebooks get %env ANYWIDGET_HMR=1 where missing. ShowComplex2D/Align2D alignment: image_width_px renamed to canvas_size; Align2D canvas_size default 300→0 to match the '0 = frontend default' pattern.
New ShowDiffraction widget
…ader Checks: fix pillow pdf save and skip missing smoke-loader workflow
…nmax ShowComplex2D: add vmin/vmax for absolute intensity range
Show4D: add vmin/vmax for absolute intensity range
Show4DSTEM: add vmin/vmax for absolute intensity range
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in test widget showcomplex, change NamedTemporaryFile to pytest's tmp_path fixture which gives an unlocked directory path (on Windows NamedTemporaryFile holds file locked so PIL cannot write to it) |
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