Filter Ranges for Enhancement, HELP!?!

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#188

From: singlis
Date: Sun, 26 Jul 1992 22:01

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Greetings,

when filtering with a standard Laplacian filter
	[ -1  -1  -1 ]
	[ -1   8  -1 ]
	[ -1  -1  -1 ]
and assuming the pixel values from 0..1 in intensity, the result of the 
operation can range from -8.0 to 8.0. What is the standard way of
mapping this result to a pixel range.

I have tried just diving by 8.0, and if negative ignore but this just gives
"black" images, I also tried /8.0 and the absolute, still it looks terrible.

I have a program for the PC, Improces which does a nice job.

Could anyone give me some tips??

thanks in advance

-Stuart Inglis, Waikato University, Hamilton, New Zealand.

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Message-ID: <1992Jul27.100116.9655@waikato.ac.nz>

Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!waikato.ac.nz!singlis

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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!waikato.ac.nz!singlis
From: singlis@waikato.ac.nz
Newsgroups: sci.image.processing
Subject: Filter Ranges for Enhancement, HELP!?!
Message-ID: <1992Jul27.100116.9655@waikato.ac.nz>
Date: 27 Jul 92 10:01:16 +1200
Organization: University of Waikato, Hamilton, New Zealand
Lines: 20