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add analysis metadata parameter to set initial sigma value used in LatGaussFitFR fitting #1683

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add analysis metadata parameter to set initial sigma value used in LatGaussFitFR fitting #1683

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f298129
add Analysis.SigmaGuess metadata parameter for LatGaussFitFR to set …
barentine Jun 29, 2026
e29500e
Merge commit '2dd617b2a9f1d007d6ce50a986e63e4a4f9e6c8d' into sigmaguess
barentine Jul 7, 2026
d5b0226
use the cannonical name for the sigma guess, and use getOrDefault for…
barentine Jul 7, 2026
e240e26
add Analysis.PSFSigmaGuess to AstigGaussFitFR and SplitterFitFNR as well
barentine Jul 7, 2026
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use the cannonical name for the sigma guess, and use getOrDefault for… 
… non-gui fitting compatibility
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@barentine
barentine committed Jul 7, 2026
commit d5b0226fb5927b02ae0da5d9392981eccb062175
6 changes: 3 additions & 3 deletions PYME/localization/FitFactories/LatGaussFitFR.py
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Expand Up @@ -168,12 +168,12 @@ def FromPoint(self, x, y, z=None, roiHalfSize=5, axialHalfSize=15):
fitBackground = self.metadata.getOrDefault('Analysis.FitBackground', True)

if fitBackground:
startParameters = [A, x0, y0, self.metadata['Analysis.SigmaGuess'], dataMean.min(), .001, .001]
startParameters = [A, x0, y0, self.metadata.getOrDefault('Analysis.PSFSigmaGuess', 250/2.35), dataMean.min(), .001, .001]

#do the fit
(res, cov_x, infodict, mesg, resCode) = self.solver(self.fitfcn, startParameters, dataMean, sigma, X, Y)
else:
startParameters = [A, x0, y0, self.metadata['Analysis.SigmaGuess']]
startParameters = [A, x0, y0, self.metadata.getOrDefault('Analysis.PSFSigmaGuess', 250/2.35)]

#do the fit
(res, cov_x, infodict, mesg, resCode) = self.solver(f_gauss2d_no_bg, startParameters, dataMean, sigma, X, Y)
Expand Down Expand Up @@ -212,7 +212,7 @@ def evalModel(cls, params, md, x=0, y=0, roiHalfSize=5):

PARAMETERS = [
mde.IntParam('Analysis.ROISize', u'ROI half size', 5),
mde.FloatParam('Analysis.SigmaGuess', u'Initial guess for Gaussian sigma (nm)', 250/2.35),
mde.FloatParam('Analysis.PSFSigmaGuess', u'Initial guess for Gaussian sigma (nm)', 250/2.35),
]

DESCRIPTION = 'Vanilla 2D Gaussian fit.'
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