50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
// Copyright (2019-2024) Paul Scherrer Institute
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#include "AzimuthalIntegration.h"
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#include "../common/JFJochException.h"
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#include "../common/RawToConvertedGeometry.h"
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#include "../common/DiffractionGeometry.h"
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AzimuthalIntegration::AzimuthalIntegration(const DiffractionExperiment& experiment, const AzimuthalIntegrationMapping &mapping) :
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pixel_to_bin(experiment.GetPixelsNum(), UINT16_MAX),
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corrections(experiment.GetPixelsNum(), 1.0),
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nbins(mapping.GetBinNumber()),
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sum(mapping.GetBinNumber(), 0),
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count(mapping.GetBinNumber(), 0)
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{
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auto mapping_raw = mapping.GetPixelToBinMappingRaw();
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RawToConvertedGeometry(experiment, pixel_to_bin.data(), mapping_raw.data());
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auto &bin_to_q = mapping.GetBinToQ();
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solid_angle_corr.resize(mapping.GetBinNumber());
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for (int i = 0; i < mapping.GetBinNumber(); i++)
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solid_angle_corr[i] = 1.0 / CalcAzIntSolidAngleCorr(experiment, bin_to_q[i]);
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}
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void AzimuthalIntegration::Process(const int16_t *data, size_t npixel) {
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if (npixel != pixel_to_bin.size())
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throw JFJochException(JFJochExceptionCategory::InputParameterInvalid,
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"Mismatch in size of pixel-to-bin mapping and image");
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for (int i = 0; i < npixel; i++) {
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auto bin = pixel_to_bin[i];
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auto value = data[i];
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if ((value > INT16_MIN + 4) && (value < INT16_MAX - 4) && (bin < nbins)) {
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sum[bin] += value;
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count[bin] += 1;
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}
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}
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}
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void AzimuthalIntegration::GetResult(std::vector<double> &result) const {
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result.resize(nbins);
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for (int i = 0; i < nbins; i++) {
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if (count[i] > 0)
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result[i] = static_cast<double>(sum[i]) / static_cast<double>(count[i]) * solid_angle_corr[i];
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else
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result[i] = 0;
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}
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}
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