``volume properties'' -- Compute various properties of a volume

purpose:

Compute the value of some volume property. The following quantities can be computed:

1. mean int. -- mean grayscale value of voxels in the volume
2. voxel count -- # of voxels > a specified grayscale cutoff
3. std. dev. -- grayscale standard deviation of voxels in the volume

The function ``voxel count'' is useful for counting up the number of nonzero voxels in a volume (set ``intensity cutoff = 1'').

input:

An 8-bit volume.

output:

A screen message giving the value of the volume property.

parameters:

Default parameters menu is

input from vol # = 0
* function = std. dev.
* intensity cutoff = 0
*

The parameter ``function = '' toggles between the names listed above under purpose.

The ``intensity cutoff = '' parameter (in graylevels) only applies to the option ``function = voxel count''.

comments:

1. A fast function.
2. This function, since it outputs screen messages, can only be used in menu mode.
3. Slice sizes up to 1024x1024 can be handled.

Updated: Fri May 19 14:39:07 CDT