Path: news.mathworks.com!newsfeed-00.mathworks.com!newsfeed2.dallas1.level3.net!news.level3.com!postnews.google.com!o10g2000yqa.googlegroups.com!not-for-mail
From: ImageAnalyst <imageanalyst@mailinator.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: image logarithm
Date: Sun, 8 Nov 2009 12:13:20 -0800 (PST)
Organization: http://groups.google.com
Lines: 12
Message-ID: <2b47f523-c68d-4f93-abaa-f741ded2e4c5@o10g2000yqa.googlegroups.com>
References: <hd74he$kb$1@fred.mathworks.com>
NNTP-Posting-Host: 75.186.70.56
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1257711200 26801 127.0.0.1 (8 Nov 2009 20:13:20 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Sun, 8 Nov 2009 20:13:20 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: o10g2000yqa.googlegroups.com; posting-host=75.186.70.56; 
	posting-account=0rLUzAkAAABojYSRC64DkTbtiSCX77HH
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; 
	GTB6; CyberSafe-IWA-Enable; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 
	3.0.04506.648; .NET CLR 3.5.21022; AskTB5.5),gzip(gfe),gzip(gfe)
Xref: news.mathworks.com comp.soft-sys.matlab:583400


On Nov 8, 2:01 pm, "Mima mima" <mima.i...@gmail.com> wrote:
> Hello,
> I want to applicate a logarithm transformation on an image in order to decrease
> contrasts in light areas and increases in dark areas. what is the fonction that I can use.
> thanks.

-------------------------------------------------------------------------------------------------
You can just do it directly (using normal, regular math), or make up
the log function and then use the intlut() function.