Spot finding works panel by panel, as the FPGA path does per JUNGFRAU module. PanelBoxes (common/) gives
one box per DetectorModule; an empty table gives one box, the whole image, so every clamp reduces to the
old image bounds in the same evaluation order (rotation sets, EIGER, CCDs, our JUNGFRAU unchanged).
- ImageSpotFinder::SetPanels: the CPU local-box pass (dense, count-threshold and the DetectAt/candidate
path of the adaptive finder) slides its windows inside each panel box; host CCL labels panel by panel;
pixels on no panel are folded into the resolution mask.
- GPU: analyze_pixel tiles each panel (warps numbered panel after panel), analyze_candidates and
union_neighbours clip to the pixel's panel, the device spot carries its panel; the GPU list is put in
panel order so it equals the host's.
- DiffractionSpot carries its panel; SpotAnalyze maps by ImageToPlane(panel, ...) (d_A on the plane).
- ImagePreprocessorBuffer::GatherTiles (CPU+GPU) clips each square to the panel of its centre.
- MXAnalysisWithoutFPGA and the pre-scan workers hand the module table to finders and buffers.
Raster algorithms: new common/AssembleToPlane.h (PlaneRasterOf, AssembleToPlane nearest-pixel gather with
gaps, GatherFromPlane back to stored pixels; empty table = copy). With panels, ShadowFinder::GetMask runs on
the projection assembled to the plane raster and gathers the mask back per stored pixel (CPU route);
FindBeamCenterFFT scores the assembled projection and reports plane coordinates; the detector diagnostic
JPEG shows the assembled plane. Without panels all three take their old path.
Harness: PanelLayout_SpotsNeverCrossPanels enabled (count threshold and SNR on the edge scene), new
PanelLayout_SpotFinderParity (CPU vs GPU, local box and adaptive, on the stacked layout),
PanelLayout_AssembleToPlane, PanelLayout_ShadowFinder, PanelLayout_BeamCenterFFT,
PanelLayout_DetectorDiagnostic (stacked vs assembled image cut to the raster).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015CeEGgpKdfkCTJb3YNMJcu
A synthetic 2 x 2 panel detector, its panels turned 0/180/90/-90 degrees, recorded twice: assembled
with the gaps masked, and stacked one panel under the other with the DetectorModules that place them -
the same value in every physical pixel. What is already layout-correct runs as [PanelLayout]: the
panel table itself, spot centroids on the plane through SpotAnalyze, and predictions going plane ->
panel -> Bragg engine -> plane.
The equivalences the next stages have to deliver are hidden cases tagged [PanelLayoutTodo], failing
today: the azimuthal-integration map and the resolution mask per stored pixel (stage 1), Bragg
integration measuring the same intensity (stage 2), and spot finding that never joins two stacked
panels (stage 3). A stage that makes its case pass retags it [PanelLayout].
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015CeEGgpKdfkCTJb3YNMJcu
leonarski_fandClaude Opus 5.5