``3D_Shrink'' - generate a shrunken (subsampled) version of an image

VFX name:

iShrink.

IMPROPTU name:

3D_Shrink.

purpose:

Shrinks a 3D volume via voxel decimation or averaging.

``Decimate'' shrinks the input 3D volume by eliminating all but every "factor"-th voxel in each direction. ``Average'' shrinks the input 3D volume by finding the mean within a ``factor''<sup>3</sup> window, replacing every ``factor''-th voxel in each direction by that value and eliminating all other voxels.

input:

An 8-bit 3D volume, from memory.

output:

An 8-bit 3D volume, written to disk.

parameters:

Default menu parameters are

shrink_type = decimate
shrink_factor = 2
output_filename = shrink_vol

``type of shrink'' can be set to either ``decimate'' or ``average.'' ``shrink factor'' must have a value between two and ten, inclusive. The filename of the output image should be entered in the appropriate slot.

comments:

1.

Quick and easy way to get a smaller version of a 3D image.

2.

A fast function.