Gaussian fit with ImageJ

[Juan Francisco-2]

Hi all:
  pls, does anyone how to fit a plot to a gaussian curve using ImageJ?
  Afte do a plot of a ROI taken on a image, i go to Analyse--->Tools---->Curve Fitting..., but I can´t see the option to fit the data to a gaussian distribution.
  Thanks.
  JFC
   

       
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[Michael Schmid]

Hi Juan Francisco,

the curve fitter was originally intended for grayscale calibration.
Using a Gaussian function makes no sense for this purpose.

If your image data are roughly a Gaussian (with zero background),
you may consider moment analysis to get the position and FWHM, see
the Moment Calculator plugin:

http://rsb.info.nih.gov/ij/plugins/moments.html

Michael

> Hi all:
>   pls, does anyone how to fit a plot to a gaussian curve using ImageJ?
>   Afte do a plot of a ROI taken on a image, i go to Analyse---
> >Tools---->Curve Fitting..., but I can´t see the option to fit the  
> data to a gaussian distribution.
>   Thanks.
>   JFC

[Dimiter Prodanov]

Hi
Fitting against a univariate gaussian is very simple. The
gaussian distribution is defined completely by its mean and
its standard deviation. All of them you estimate from the data.
Moreover, the lest-square estimator coincides with the maximum likelihood
estimators for both parameters.
Now, if you want to fit mulitvariate gaussian then it is considerably
more difficult

best

D Prodanov

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