DI NF - Dilate an object - do not fuse objects

(3/14/01)

PURPOSE

Dilates (enlarges) object in a input image/volume. Will not add a pixel/voxel if it causes contact of pixels having differing values both greater than zero i.e. will not fuse clusters of different values.   Example.

SEE ALSO

EC CL [Extract Connected Clusters]
ER [Erode object in a binary image/volume]
ER SK [Erode object a binary image to make its skeleton]
DI [Dilate (enlarge) object in a binary image/volume]

USAGE

.OPERATION: DI NF

.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 total neighborhood around a voxel. (Should be an odd number).]

.DILATE IF NUMBER OF OCCUPIED NEIGHBORS IS > THAN: 6
[Voxel will be set to 1.0 if it has at least this many occupied neighbors and does not cause fusion of clusters having different values.]

NOTES

  1. Requires an input image/volume with voxels having values zero or greater. Voxels having a density > 0.0 are considered occupied. Dilated areas are set to value of the same value as their neigbor has.

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

SUBROUTINES

DILATION

CALLER

UTIL3

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