[Anand Joshi]

Thanks, Mike for your feedback. With the current release, you can use the Matlab functions from SVReg source code to load the label nifti files in Matlab, delete and combine the labels you want, and then save the file.

Here is a pseudocode

v=load_nii_BIG_Lab(labelfilename);
v.img(v.img==l1||v.img==l2)=l1; %combine labels l1 and l2
v.img(v.img==l3)=0; %delete label l3
save_untouch_nii(out_file, v)

[David Shattuck]

One way you can do this is by using the LabelMask tool, which is in the Delineation Panel. If you press ‘Update List’ you will see all of the labels that are in the label volume. Select all of the ones you want to keep, then press Make Mask. If you then load the label file as the primary volume, you can then apply the mask to the volume (press ‘Apply’), and it will set all of the labels outside of the mask to 0. Save the primary volume as your new label volume, and then load it. It should only have the labels that you want.

[mike214]

many thanks for your help!
Both ways worked well, except combining the labels

v.img(v.img==l1||v.img==l2)=l1; %combine labels l1 and l2
returns
Operands to the || and && operators must be convertible to logical scalar values

using only | instead of || does not combine the labels…

any idea ?
many thanks, mike

[Anand Joshi]

For combining
v.img(v.img==l1|v.img==l2)=l1;
should work. What happens when you do that?

[mike214]

yes, it does! sry, was checking wrong filename.
Great! You saved my publication :)
many thanks

[Author]

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