SYNOPSIS:
    VOL_DEFLATE axis factor

DESCRIPTION:
    Deflate the volume by an integer factor along an axis.
    The newly generated volume will have grey values linearly
    interpolated from the original planes. If you want to deflate
    the volume in all dimensions, just call this function multiple
    times, once for each axis.

SEE ALSO:
    VOL_INFLATE, VOL_SCALE, VOL_SET
