``3D_Expand'' - generate an expanded (zoomed) version of an image

VFX name:

iExpand.

IMPROPTU name:

3D_Expand.

purpose:

Expands a 3D volume via voxel replication or linear interpolation.

``Replicate'' expands the input 3D volume by creating a new volume of size ``(mx*factor) x (my*factor) x (mx*factor)'' (where mx, my, and mz are the x, y, and z dimensions of the input volume, and factor is the expansion factor). The graylevel value of each voxel in the original image is copied into its corresponding ``factor''³ cube in the output image.

``Interpolate'' expands the input 3D volume via a four step process. First, a new volume is created of size ``(mx*factor) x (my*factor) x (mx*factor),'' just as in ``replicate.'' Then, the voxels are interpolated in the x, y, and z directions, in that order.

input:

An 8-bit 3D volume, from memory.

output:

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

parameters:

Default menu parameters are

expand_type = replicate
expand_factor = 2
output_filename = expand_vol

``type of expand'' can be set to either ``replicate'' or ``interpolate.'' ``expand 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 bigger version of a 3D image.

2.

A fast function.