vbcmp

From VoxBoWiki

vbcmp compares two 3D or 4D files and tells you how they differ.

Here's the help for vbcmp:

VoxBo vbcmp (v1.8.5pre8/May  6 2010)
summary: compare two 3D or 4D volumes
usage:
  vbcmp  <3D file/dir> <another 3D file/dir>

Here's some sample output for 3D data:

[I] vbcmp: different voxels: 179923 of 184320 (98%)
[I] vbcmp: mean difference: 174.88974728
[I] vbcmp: max difference: 1361.00000000

And here's some sample output for 4D data:

[I] vbcmp: different voxels: 5732179 of 20643840 (28%)
[I] vbcmp: mean difference: 10.85106065
[I] vbcmp: max difference: 329.00000000
[I] vbcmp: 112 of 112 volumes differ