Hi everybody
I'm trying to use fast4 on a dataset and get 6 output files:
- name_pve_1, name_pve_2 and name_pve_3
- name_mixeltype
- name_pveseg
- And finally, name_seg
The first five all contain results which look fine. (pveseg for instance,
contains a somewhat crude segmentation result)
The problem however is in the name_seg file. All voxels have a value of 1.
So while the segmentation algorithm at some point knew approximately how to
divide the image somewhere along the line it lost it again.
To check if it was a hyperparameter problem (maybe the algorithm tries to
obtain a very smooth result by turning everything into a single class) I
once ran it using the default value (0.3) and once letting it decide by
itself (-H -1). Didn't work though.
This is how I call fast4:
fast4 -t 0 -v -n 3 -H -1 -o output_name input_name
----
Starting Single Image Segmentation
T1-weighted image
Imagesize : 370 x 300 x 250
Pixelsize : 0.15 x 0.15 x 0.15
----
This is an interpolated dataset so it is a bit large but that should not be
a problem should it?
Has anyone encountered this before or does anybody know how to solve it?
Many thanks,
Peter
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