ER - Erode a binary image/volume

PURPOSE

Erodes object in an input image/volume.

SEE ALSO

EC CL	[Extract Connected Clusters]
DI	[Dilate a binary image/volume]
ER SK	[Erode a binary image to make skeleton]
ER EDM	[Create Euclidean Distance Map]

USAGE

.OPERATION: ER

.INPUT FILE: VOL001
[Enter the name of the input file.]

.OUTPUT FILE: VOL002
[Enter name for output file.]

.BOX OR CROSS NEIGHBORHOOD (B/C): C
[Shape of neighborhood. Box is a square/cube centered on each voxel, cross is a 2/3-dimensional cross centered on each voxel.]

.LENGTH OF NEIGHBORHOOD: 3
[Length of the neighborhood around a voxel. (Should be an odd number).]

.ERODE IF NUMBER OF OCCUPIED NEIGHBORS IS LESS THAN: 26
[Voxel will be set to 0.0 (eroded) if it has fewer than this many occupied neighbors.]

NOTES

1. Requires a "binary" input image/volume with voxels having either zero or one. Eroded areas are set to value of zero.

2. Image/volume is "circularly closed" so that voxels on boundaries have a neighbor on opposite boundary.

SUBROUTINES

EROSION

CALLER

UTIL3