CE LAP - Contrast Enhancement - Laplacian

(5/03/01)

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

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