Files
Jungfraujoch/image_analysis/MXAnalysisWithoutFPGA.cpp
T
leonarski_fandClaude Opus 4.8 9a8c946555 Add self-calibrating adaptive spot detection for offline stills
The offline CPU spot finder marks a pixel strong when it clears a fixed photon
count AND a local-window SNR. The fixed photon floor forces per-dataset tuning:
its sweet spot tracks the background level (weak sets want a low threshold,
strong or high-background sets a high one) and the usable window is narrow, so
users hand-tune --spot-threshold/--spot-sigma per dataset.

Add an opt-in --adaptive-spots mode (AdaptiveSpotFinderCPU) that replaces the
fixed floor with a per-resolution-ring threshold derived from each image's own
noise. Per ring it computes a peak-excluded background mean and sigma (one plain
pass + two sigma-clip passes over the assembled photon image, binned by the
azimuthal-integration ring index) and sets

    thr = max( PoissonTail(mean, p), mean + z * sqrt(sigma^2 + read^2) )

with p = false_pixels_per_frame / n_pixels the single portable knob (default
100) and z = Phi^-1(1 - p). The Poisson arm is the correct significance where
the background is countable (it carries the sqrt(mean) shot noise, so a bright
low-resolution ring gets a high threshold); the read-noise-floored Gaussian arm
keeps the threshold physical where the background vanishes (empty high-resolution
rings), without which those rings flood. read is a detector-level constant, not
a per-dataset knob. Both arms are needed: Poisson alone floods near-zero
background, Gaussian alone drops the shot-noise term and under-thresholds bright
rings.

One --adaptive-spots setting then adapts across a wide range of serial datasets
with no per-dataset threshold, matching or beating hand-tuned thresholds and the
peakfinder8/xgandalf reference on both weak large-cell and strong serial data,
with equal merged R-free.

The finder runs on the CPU (offline/viewer path) and reads the host image, which
the GPU pipeline already keeps in sync, so it works in either build. The default
(non-adaptive) path and the online/FPGA path are unchanged.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-23 17:23:19 +02:00

167 lines
7.9 KiB
C++

// SPDX-FileCopyrightText: 2024 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only
#include "MXAnalysisWithoutFPGA.h"
#include "spot_finding/StrongPixelSet.h"
#include "../compression/JFJochDecompress.h"
#include "spot_finding/SpotUtils.h"
#include "bragg_prediction/BraggPredictionFactory.h"
#include "image_preprocessing/ImagePreprocessorCPU.h"
#include "azint/AzIntEngineCPU.h"
#include "roi/ROIIntegrationCPU.h"
#include "spot_finding/ImageSpotFinderCPU.h"
#include "bragg_integration/BraggIntegrationEngineCPU.h"
#ifdef JFJOCH_USE_CUDA
#include "azint/AzIntEngineGPU.h"
#include "roi/ROIIntegrationGPU.h"
#include "spot_finding/ImageSpotFinderGPU.h"
#include "image_preprocessing/ImagePreprocessorGPU.h"
#include "image_preprocessing/ImagePreprocessorBufferGPU.h"
#include "bragg_integration/BraggIntegrationEngineGPU.h"
#include "../common/CUDAWrapper.h"
#endif
MXAnalysisWithoutFPGA::MXAnalysisWithoutFPGA(const DiffractionExperiment &in_experiment,
const AzimuthalIntegrationMapping &in_integration,
const PixelMask &in_mask,
IndexAndRefine &in_indexer)
: experiment(in_experiment),
integration(in_integration),
npixels(experiment.GetPixelsNum()),
xpixels(experiment.GetXPixelsNum()),
indexer(in_indexer),
prediction(CreateBraggPrediction(experiment.IsRotationIndexing())),
mask(in_mask),
mask_resolution(experiment.GetPixelsNum(), false),
mask_high_res(-1),
mask_low_res(-1) {
#ifdef JFJOCH_USE_CUDA
if (get_gpu_count() == 0) {
#endif
preprocessor_buffer = std::make_unique<ImagePreprocessorBuffer>(experiment.GetPixelsNum());
spotFinder = std::make_unique<ImageSpotFinderCPU>(experiment.GetXPixelsNum(), experiment.GetYPixelsNum());
azint = std::make_unique<AzIntEngineCPU>(integration);
preprocessor = std::make_unique<ImagePreprocessorCPU>(in_experiment, in_mask);
bragg_engine = std::make_unique<BraggIntegrationEngineCPU>(in_experiment);
if (experiment.ROI().size() >= 1)
roi = std::make_unique<ROIIntegrationCPU>(experiment);
#ifdef JFJOCH_USE_CUDA
} else {
stream = std::make_shared<CudaStream>();
preprocessor_buffer = std::make_unique<ImagePreprocessorBufferGPU>(experiment.GetPixelsNum());
preprocessor = std::make_unique<ImagePreprocessorGPU>(in_experiment, in_mask, stream);
spotFinder = std::make_unique<ImageSpotFinderGPU>(experiment.GetXPixelsNum(), experiment.GetYPixelsNum(), stream);
azint = std::make_unique<AzIntEngineGPU>(integration, stream);
bragg_engine = std::make_unique<BraggIntegrationEngineGPU>(in_experiment, stream);
if (experiment.ROI().size() >= 1)
roi = std::make_unique<ROIIntegrationGPU>(experiment, stream);
}
#endif
adaptiveSpotFinder = std::make_unique<AdaptiveSpotFinderCPU>(integration);
}
void MXAnalysisWithoutFPGA::Analyze(DataMessage &output,
AzimuthalIntegrationProfile &profile,
const SpotFindingSettings &spot_finding_settings) {
if ((output.image.GetWidth() != xpixels)
|| (output.image.GetWidth() * output.image.GetHeight() != npixels))
throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
"Mismatch in pixel size");
const auto compression_start_time = std::chrono::steady_clock::now();
const uint8_t *image_ptr = output.image.GetUncompressedPtr(decompression_buffer);
const auto compression_end_time = std::chrono::steady_clock::now();
if (output.image.GetCompressionAlgorithm() != CompressionAlgorithm::NO_COMPRESSION)
output.compression_time_s = std::chrono::duration<float>(compression_end_time - compression_start_time).count();
const auto preprocessing_start_time = std::chrono::steady_clock::now();
auto ret = preprocessor->Analyze(*preprocessor_buffer, image_ptr, output.image.GetMode());
const auto preprocessing_end_time = std::chrono::steady_clock::now();
output.preprocessing_time_s = std::chrono::duration<float>(preprocessing_end_time - preprocessing_start_time).count();
const auto azint_start_time = std::chrono::steady_clock::now();
azint->Run(*preprocessor_buffer, profile);
const auto azint_end_time = std::chrono::steady_clock::now();
output.azint_time_s = std::chrono::duration<float>(azint_end_time - azint_start_time).count();
if (roi)
roi->Run(*preprocessor_buffer, output.roi);
if (spot_finding_settings.enable) {
// Update resolution mask
if (mask_high_res != spot_finding_settings.high_resolution_limit
|| mask_low_res != spot_finding_settings.low_resolution_limit)
UpdateMaskResolution(spot_finding_settings);
const auto spot_finding_start_time = std::chrono::steady_clock::now();
ImageSpotFinder &finder = spot_finding_settings.adaptive_threshold
? static_cast<ImageSpotFinder &>(*adaptiveSpotFinder)
: *spotFinder;
const std::vector<DiffractionSpot> spots = finder.Run(*preprocessor_buffer, spot_finding_settings, mask_resolution);
SpotAnalyze(experiment, spot_finding_settings, spots, output);
const auto spot_finding_end_time = std::chrono::steady_clock::now();
output.spot_finding_time_s = std::chrono::duration<float>(spot_finding_end_time - spot_finding_start_time).count();
if (spot_finding_settings.indexing)
indexer.ProcessImage(output, spot_finding_settings, *prediction,
[this](const std::vector<Reflection> &predicted, size_t npredicted, int64_t image_number) {
return bragg_engine->Run(*preprocessor_buffer, predicted, npredicted, image_number);
});
}
output.max_viable_pixel_value = ret.max_value;
output.min_viable_pixel_value = ret.min_value;
output.error_pixel_count = ret.error_pixel_count;
output.saturated_pixel_count = ret.saturated_pixel_count;
output.az_int_profile = profile.GetResult();
output.az_int_profile_count = profile.GetPixelCount();
output.az_int_profile_std = profile.GetStd();
output.bkg_estimate = profile.GetBkgEstimate(integration.Settings());
output.ice_ring_score = profile.GetIceRingScore(integration.Settings(),
spot_finding_settings.ice_ring_width_Q_recipA);
}
void MXAnalysisWithoutFPGA::RebuildROI() {
if (experiment.ROI().empty()) {
roi.reset();
return;
}
#ifdef JFJOCH_USE_CUDA
if (stream) {
roi = std::make_unique<ROIIntegrationGPU>(experiment, stream);
return;
}
#endif
roi = std::make_unique<ROIIntegrationCPU>(experiment);
}
void MXAnalysisWithoutFPGA::AnalyzeROIOnly(DataMessage &output) {
if ((output.image.GetWidth() != xpixels)
|| (output.image.GetWidth() * output.image.GetHeight() != npixels))
throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
"Mismatch in pixel size");
const uint8_t *image_ptr = output.image.GetUncompressedPtr(decompression_buffer);
preprocessor->Analyze(*preprocessor_buffer, image_ptr, output.image.GetMode());
RunROIOnly(output);
}
void MXAnalysisWithoutFPGA::RunROIOnly(DataMessage &output) {
output.roi.clear();
if (roi)
roi->Run(*preprocessor_buffer, output.roi);
}
void MXAnalysisWithoutFPGA::UpdateMaskResolution(const SpotFindingSettings &settings) {
mask_low_res = settings.low_resolution_limit;
mask_high_res = settings.high_resolution_limit;
auto const &resolution_map = integration.Resolution();
for (int i = 0; i < mask_resolution.size(); i++)
mask_resolution[i] = (resolution_map[i] > mask_low_res) || (resolution_map[i] < mask_high_res);
}