Path: news.mathworks.com!newsfeed-00.mathworks.com!nntp.TheWorld.com!newsswitch.lcs.mit.edu!newspump.monmouth.com!newspeer.monmouth.com!nx02.iad01.newshosting.com!newshosting.com!novia!news-out.readnews.com!news-xxxfer.readnews.com!postnews.google.com!r16g2000vbn.googlegroups.com!not-for-mail
From: ImageAnalyst <imageanalyst@mailinator.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: color based segmentation
Date: Thu, 2 Jul 2009 07:01:09 -0700 (PDT)
Organization: http://groups.google.com
Lines: 22
Message-ID: <99c29e24-3af6-4bba-878f-a12fc3c127d7@r16g2000vbn.googlegroups.com>
References: <h2i2b1$2aq$1@fred.mathworks.com> <h2ibl5$ljm$1@fred.mathworks.com> 
	<h2icfe$g3q$1@fred.mathworks.com>
NNTP-Posting-Host: 192.44.136.113
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-Trace: posting.google.com 1246543270 31725 127.0.0.1 (2 Jul 2009 14:01:10 GMT)
X-Complaints-To: groups-abuse@google.com
NNTP-Posting-Date: Thu, 2 Jul 2009 14:01:10 +0000 (UTC)
Complaints-To: groups-abuse@google.com
Injection-Info: r16g2000vbn.googlegroups.com; posting-host=192.44.136.113; 
	posting-account=0rLUzAkAAABojYSRC64DkTbtiSCX77HH
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; 
	GTB6; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 
	3.5.21022),gzip(gfe),gzip(gfe)
X-HTTP-Via: 1.1 bdci2px (NetCache NetApp/6.0.7)
Xref: news.mathworks.com comp.soft-sys.matlab:552391


On Jul 2, 9:25 am, "rubionelove " <rubionel...@gmail.com> wrote:
> thanks Image Analyst,
> I understand...  but I'm working on a sequence of aerial images of cars.
> Cars can assume a range of different colours. I can't define a way to segment a colour, I would like a scalable solution.
>
> I would like to define a treshold and then join in a separate blob each uniform area, for example, in the case of the rose, I would like a green blob and a yellow blob.
> How can I do that?
>
> thank you very much

-----------------------------------------------------------------------------------------
Can you post a photo somewhere?  What do you really want to do?  Do
you want to count cars?  Do you want to get the size distribution of
cars?  Do you want to give a distribution of the dominant car colors?
The answer to this question will determine if you really even need to
do color classification or if you should do some standard image
processing such as edge detection, morphology, etc.