Re: [Freesurfer] freeview: Creating and using a LUT with a single region

Hi Tamas,

I think this is a bug in freeview. It creates interpolated colors for values that are not in the table. We usually deal with LUT with full range of values so this hasn't happened to us. I will fix it.

Best, Ruopeng

On 08/27/2014 08:38 AM, Tamás Hauer wrote:

Hi,

I am trying to use a LUT which picks out just one region of the segmentation, e.g.:

$ cat HCOnlyColorLUT.txt #$Id: FreeSurferColorLUT.txt,v 1.70.2.7 2012/08/27 17:20:08 nicks Exp $

#No. Label Name: R G B A

0 Unknown 0 0 0 255 17 Left-Hippocampus 220 216 20 0

with which I expect the segmentation overlay to have only one yellow region corresponding to the left HC. I run the command line:

$ freeview -v T1.mgz aseg.mgz:colormap=lut:lut=HCOnlyColorLUT.txt

after which I am getting the overlay displayed as below. I must be doing something stupid, could you, please help me out?

Thanks

Tamás

-- Tamás Hauer McMRI AG Neugasse 55 9000 St. Gallen, Switzerland Tel: (+41)-76-380-7379 Tel: (+41)-71-913-0580 Fax: (+41)-71-913-0589

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