Hi Irina,

You can check out this web site for an approximate conversion from "smooth steps" to FWHM:

http://www.nmr.mgh.harvard.edu/~greve/surf-smooth/

doug

On Wed, 13 Oct 2004, Bruce Fischl wrote:

Hi Irina,

it's an iterative approximation to isotropic Gaussian smoothing (2 means two steps of iterative averaging).

I think the relationship is:

sigma = sqrt(niter * 2 / pi)

cheers, Bruce

On Wed, 13 Oct 2004, Irina Sigalovsky wrote:

...

Hi,

I was wondering what exactly it means to smooth a surface with a step of 2 (i.e., what filter and parameters are used).

Thanks, Irina

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