It's the intensity normalization. You can find the exact derivation of
the command in $FSLDIR/tcl/featlib.tcl -- search for the string "intnorm"
and you'll find the code.
cheers,
-MH
--
Michael Harms, Ph.D.
-----------------------------------------------------------
Conte Center for the Neuroscience of Mental Disorders
Washington University School of Medicine
Department of Psychiatry, Box 8134
660 South Euclid Ave. Tel: 314-747-6173
St. Louis, MO 63110 Email: [log in to unmask]
On 3/24/14 12:35 PM, "Jack Grinband" <[log in to unmask]> wrote:
>Hi All,
>I ran feat with everything turned off (preproc only, no mcflirt, no
>slicetiming, no background thresh, etc). FEAT still does a scaling of
>the data:
>
>/Applications/fsl/bin/fslmaths prefiltered_func_data -mul 18.9753320683
>prefiltered_func_data_intnorm
>
>What is this normalization step and how did FEAT come up with 18.97?
>thanks!
>
>jack
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