``complement'' - complement a volume

VFX name:

iComplement.

IMPROPTU name:

Complement.

purpose:

All voxels greater than or equal to the threshold are set to 0. All others are set to 1. This is the gray-scale complement operation. For a binary-valued volume, if the threshold is set to 1, then all 1's are set to 0 and all 0's are set to 1.

input:

An 8-bit volume.

output:

The gray-scale complement of the input 8-bit volume.

parameters:

Default parameters menu is

threshold = 0

comments:

1.

A very fast function.