[Freesurfer] overlap/intersection of labels?

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Dear freesurfers,

is there an elegant way of computing the intersection or overlap of different labels or - which would be even more useful for my application - annotations?

I only managed to find labels_intersect (which appears to be from https://secure-web.cisco.com/12D3ntbm8RDBV366hh41UjEkFWk2mrjQHSMiY8WEom0naUe... ) which is awfully slow. In case this is of use for anyone else, I attached a modified version using 'join' that runs much faster, only has some compatibility issues with Mac.

time labels_intersect precentral.label frontal.label out1.label > /dev/null

real 1m41.862s user 0m31.052s sys 0m30.757s

time bash bash_labels_intersect.sh precentral.label frontal.label out2.label

real 0m0.193s user 0m0.118s sys 0m0.015s

diff -w out1.label out2.label

Thank you and best wishes

Cornelius

-- Cornelius Kronlage Assistenzarzt Klinik für Neurologie | Neurologie mit Schwerpunkt Epileptologie Universitätsklinikum Tübingen Hoppe-Seyler-Str. 3 | 72076 Tübingen