Path: news.mathworks.com!not-for-mail
From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: how to transform the power spectra image into spectrum diagram?
Date: Thu, 9 Apr 2009 13:19:01 +0000 (UTC)
Organization: STFC Rutherford Appleton Laboratory
Lines: 10
Message-ID: <grksk5$p6m$1@fred.mathworks.com>
References: <e86ceb09-d620-496d-a2a3-fa987954c5d9@k8g2000yqn.googlegroups.com> <a0e8c843-4124-4c2c-8bbf-ef1fb8aeb646@t11g2000vbc.googlegroups.com>
Reply-To: <HIDDEN>
NNTP-Posting-Host: webapp-03-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1239283141 25814 172.30.248.38 (9 Apr 2009 13:19:01 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Thu, 9 Apr 2009 13:19:01 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 968489
Xref: news.mathworks.com comp.soft-sys.matlab:531669


islinaismail@gmail.com wrote in message <a0e8c843-4124-4c2c-8bbf-ef1fb8aeb646@t11g2000vbc.googlegroups.com>...
> Oh...i see....but,let say if i have 2 images that absolutely same but
> was captured in the different angle/direction.Does fft2 can detect it
> as the same image source not? thanks...

No - they will be detected as different images. The 2D transform gets rotated by the same amount as the original image subject, and thus will not match.

Regards

Dave Robinson