SPIDER: ER SK (Erode object a binary image to make its skeleton)

ER SK - Erode object a binary image to make its skeleton

(4/20/13)

PURPOSE: Erodes object in a binary input image until its "skeleton" is arrived at. Uses four-fold connectivity inside a cross neighborhood. Example.

SEE ALSO

ER	[Erode object in a binary image/volume]
DI	[Dilate (enlarge) object in a binary image/volume]

USAGE

.OPERATION: ER SK

.INPUT FILE: IMG001
[Enter the name of the input file.]

.OUTPUT FILE: IMG002
[Enter name for output file.]

NOTES

Requires a "binary" input image with pixels having either zero or one. Eroded areas are set to value of zero.
Image is "circularly closed" so that pixels on boundaries have a neighbor on opposite boundary.
Does NOT work on volumes.