CE LAP - Contrast Enhancement - Laplacian

PURPOSE

Laplacian convolution on image/volume. Useful for edge detection.   Example.

SEE ALSO

CE VAR	[Contrast Enhancement - Variance]
ED	[Edge Detection]

USAGE

.OPERATION: CE LAP

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

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

.NEIGHBORHOOD X & Y: 3, 3
[Length of the neighborhood around a pixel. Must be an odd number.]

NOTES

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

2. Laplacian 3x3 kernal in 2D is
   

    
              -1  -1  -1 
              -1   8  -1 
              -1  -1  -1 
   

3. Laplacian kernal in 3D is a 3D extension of the 2D kernal.

SUBROUTINES

FILTER

CALLER

UTIL2