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LAPLACE

Section: User Commands (1)
Updated: 16 Mar 1998
Index

NAME

laplace - edge and line detection

SYNTAX

laplace [-scale <n>] [-offset <m>] [-title <title>]
[-verbose] <inimage> <outimage> a b c

DESCRIPTION

laplaceperform a 3x3 convolution on the input imageinimageand write the result to outimage.The convolution kernel is specified by a, b and c

     a b a
     b c b
     a b a

If -scale(-s) and -offset(-o) is specified alldata are scaled:
pix = (conv. result) * scale + offset;

Othewise an autoscaling is performed.

-title(-t) titleis used to set a new title on theoutput image.

If -verbose(-v) is specified laplacewrites a messageif the convolution sum is less than 0 or greater than 255.If autoscale is performed the scale and offset factors aredisplayed

EXAMPLE

laplace mona.img m.img -scale 1.5 -1 -1 8

AUTHOR

Otto Milvang

ID

$Id: laplace.c,v 1.25 1996/11/08 14:03:05 svein Exp $

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