EXTRACTOR has been changed so that it now works on NDFs with higher number of dimensions, provided that only two dimensions are significant. This means it's now possible to run EXTRACTOR on a plane of a cube:
extractor cube'(,,1)'
EXTRACTOR has also been changed to avoid converting all data to single
precision reals before they are processed. This makes it much more efficient
when accessing integer and double precision data.
EXTRACTOR An Astronomical Source Detection Program