Hi Christian and Martin
mris_divide_parcellation finds the primary eigen-axis of the parcellation
along the cortical surface, then splits it up into as many units as
specified (either enough to get it under the area threshold, or
explicitly specifed in a split file)
cheers
Bruce
p.s. the code is open source so you are always welcome to grab it and take
a look
On Mon, 3 Feb 2014, Martin Luessi
wrote:
I'm wondering about this as well. It would be great if someone who is
familiar with the FreeSurfer code could explain the split algorithm.
Best,
Martin
On 01/29/14 14:36, Christian Brodbeck wrote:
Dear Freesurfer developers,
I am trying to replicate mris_divide_parcellation for mne-python
(https://github.com/mne-tools/mne-python/pull/1085). I think I am doing the
same as the MRISdivideAnnotationUnit function
(https://github.com/neurodebian/freesurfer/blob/master/utils/annotation.c#L473),
but the result still looks different. Could someone point out how exactly the
split is done, and if there are any steps in addition to the function? Are
there any measures that are taken when the split would result in two
disconnected regions belonging to the same label? And what surface is the split
performed on (I would assume that would be “white”)?
Thank you!
Christian
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