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calculatePhasor.m
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calculatePhasor.m
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% [PhasorG, PhasorS, PixelIndices] = calculatePhasor(FlimData,
% IntensityThreshold, Omega, IRFTransform)
function [PhasorG, PhasorS, PixelIndices] = calculatePhasor(FlimData, ...
IntensityThreshold, Omega, IRFTransform)
if (~isnumeric(IntensityThreshold)) || (numel(IntensityThreshold) ~= 2)
error('`IntensityThreshold'' has to be an interval.');
end
Length = numel(FlimData.PixelDecayHistogram);
PhasorG = zeros(1, Length);
PhasorS = zeros(1, Length);
PixelIndices = 1 : Length;
CosSeries = cos(Omega * FlimData.DecayHistogramTimeAxis);
SinSeries = sin(Omega * FlimData.DecayHistogramTimeAxis);
PixelDecayHistograms = FlimData.PixelDecayHistogram;
if canUseGPU
parpool(feature('numcores'));
parfor ii = 1 : Length
Sum = sum(PixelDecayHistograms{ii});
if (Sum >= min(IntensityThreshold)) && ...
(Sum <= max(IntensityThreshold))
Real = CosSeries * PixelDecayHistograms{ii} / Sum;
Imag = SinSeries * PixelDecayHistograms{ii} / Sum;
PhasorG(ii) = real((Real + Imag * 1i) / IRFTransform);
PhasorS(ii) = imag((Real + Imag * 1i) / IRFTransform);
end
end
else
for ii = 1 : Length
Sum = sum(PixelDecayHistograms{ii});
if (Sum >= min(IntensityThreshold)) && ...
(Sum <= max(IntensityThreshold))
Real = CosSeries * PixelDecayHistograms{ii} / Sum;
Imag = SinSeries * PixelDecayHistograms{ii} / Sum;
PhasorG(ii) = real((Real + Imag * 1i) / IRFTransform);
PhasorS(ii) = imag((Real + Imag * 1i) / IRFTransform);
end
end
end
VoidIdx = (PhasorG == 0) & (PhasorS == 0);
PhasorG(VoidIdx) = [];
PhasorS(VoidIdx) = [];
PixelIndices(VoidIdx) = [];
if canUseGPU
delete(gcp('nocreate'));
end
end