Search found 176 matches

by Olivier Coulon
Thu Feb 03, 2005 1:27 pm
Forum: Anatomist
Topic: Saving graph preferences
Replies: 3
Views: 4959

Saving graph preferences

Hello,
is there a way to save the graph parameters in Anatomist, and not just the general preferences ?
I need to color my graphs by labels and not names (the default) and I have to change the settings everytime I start Anatomist...
Thank you.

Olivier
by Olivier Coulon
Tue Feb 01, 2005 4:45 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

It's alright Jeff, don't bother looking for oàne. I can see what the brainvisa process is generating, my only problem is that it is using a lot of default values so not all the options are explicitely set up. I guess I have to wait for Denis' return.
thanks a lot,

Olivier
by Olivier Coulon
Tue Feb 01, 2005 4:32 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

Thanks Jeff, there is a parameter file for siRelax that can be used to define all options. That is what I am using. And there seems to be a way to turn off the aznnealing extension but I do not know the exact syntax for that. Since Denis generates the parameter file "on the fly" in the Bra...
by Olivier Coulon
Tue Feb 01, 2005 3:35 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

Hello Denis and others, some more questions about siRelax : - every N iterations, with N a parameter, the annealing does three "special" iterations : Void pass CONN_VOID CONNECT What are those ? I can't figure out what they do. Is there a way to turn those "extensions" off ? Than...
by Olivier Coulon
Mon Jan 17, 2005 3:19 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

Me again,
I found it in :

shared/main/nomenclature/syntax/adap.stx

Sorry about the previous question, I should have looked there before...

Olivier
by Olivier Coulon
Mon Jan 17, 2005 2:33 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

tree files that define models for siRelax

Hi there,
what are the syntax files for tree files that define models (for siRelax) ?
I looked in the siRelax/main/shared/ directory but still can't find one ?
Thanks ,

Olivier
by Olivier Coulon
Thu Jan 13, 2005 4:36 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

Yes, that's what it was, I don't use the label attribute and I did not realise it was mandatory in the nodes of the model graph.
As always : thank you Denis,

Olivier
by Olivier Coulon
Thu Jan 13, 2005 11:56 am
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

HI, I am back with some more problems. When I call : siRelax paramFile.tree I get the following message : missing semantic attribute label terminate called after throwing an instance of 'carto::invalid_format_error' what() : missing semantic attribute label I used the syntax defined by the file : si...
by Olivier Coulon
Wed Jan 12, 2005 1:29 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

Thank you Denis.
by Olivier Coulon
Wed Jan 12, 2005 12:05 pm
Forum: Anatomist
Topic: siRelax
Replies: 16
Views: 14553

siRelax

Hi there, I suppose my question is mostly for Denis here (again :wink: ). I am trying to use the siRelax command and I have a few questions about the parameter file. I am building a parameter file using the siRelax.stx syntax, found in sigraph-main/shared/config/ You (Denis) once told me that I coul...
by Olivier Coulon
Mon Dec 13, 2004 3:38 pm
Forum: BrainVISA
Topic: Single Files to Volume Series
Replies: 2
Views: 5618

Single Files to Volume Series

Hello, we have trouble using the brainvisa converter 'Single Files to Volume Serie'. If we give a 4D volume containing a serie of 3D volumes as an input, it extracts only the first 3D volume for the output. Is there a way to give a list of names in the output box such that the process extracts all t...
by Olivier Coulon
Mon Dec 13, 2004 12:22 pm
Forum: BrainVISA
Topic: Echoplanar Distorsion Correction
Replies: 1
Views: 4746

Echoplanar Distorsion Correction

Hi everybody, we notice a slight problem with the echoplanar distorsion correction for diffusion images using Brainvisa. We have two different b-values, b=400 and b=1500. The b=400 images seem to be corrected properly, but for the b=1500 images, a large number of slices have not been corrected prope...
by Olivier Coulon
Fri Nov 19, 2004 2:11 pm
Forum: Anatomist
Topic: Concatenating graphs
Replies: 1
Views: 3553

Concatenating graphs

Hello there,
is there a straightforward way to concatenate two graphs ? I don't want to add any edge, I just want all the nodes to end up in a single graph and the existing edges to be maintained...

Thanks,

Olivier
by Olivier Coulon
Wed Sep 08, 2004 2:30 pm
Forum: BrainVISA
Topic: DTI - Negative Values
Replies: 5
Views: 9590

Some of the components of the tensor diagonal of each subject have negative values. The trace of the tensor is an invariant, so it can not be negative. Is it indeed the trace that is negative or just some diagonal components ? Also, where are the points where it happens ? As there is no constraints...
by Olivier Coulon
Tue Sep 07, 2004 2:47 pm
Forum: BrainVISA
Topic: DTI - Negative Values
Replies: 5
Views: 9590

This is normal. Coefficients of the tensor matrix are allowed to be negative. Only eigenvalues have to be positive.

PS: use the reply function instead of creating a new post each time.