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

**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**

- Image/volume is "circularly closed" so that pixels on
boundaries have a neighbor on opposite boundary.
- Laplacian 3x3 kernal in 2D is

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

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

**SUBROUTINES**- FILTER

**CALLER**- UTIL2

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