#!/bin/sh
# Make an inverse binary image mask (switch the 1s and 0’s)
# Create the inverse mask (Mark Jenkinson's approach. Very clever:
# Multiply by negative 1, then add 1). Make sure you pass in a binary mask)
fslmaths mask -mul -1 -add 1 -bin mask_inverse
# OR use -binv flag
fslmaths mask -binv mask_inverse