laplace
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Name
laplace - edge and line detection
Syntax
laplace [-scale <n>] [-offset <m>] [-title <title>]
[-verbose] <inimage> <outimage> a b c
Description
laplace perform a 3x3 convolution on the input image
inimage and 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 all
data are scaled:
pix = (conv. result) * scale + offset;
Othewise an autoscaling is performed.
-title (-t) title is used to set a new title on the
output image.
If -verbose (-v) is specified laplace writes a message
if the convolution sum is less than 0 or greater than 255.
If autoscale is performed the scale and offset factors are
displayed
Example
laplace mona.img m.img -scale 1.5 -1 -1 8
See also
laplace(3), lapZeroCross(1), conv3x3(1)
Author
Otto Milvang
Id
$Id: laplace.c,v 1.25 1996/11/08 14:03:05 svein Exp $