Path: news.mathworks.com!not-for-mail
From: <HIDDEN>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Embedded Image Resizing using FFT
Date: Fri, 21 Nov 2008 17:24:01 +0000 (UTC)
Organization: Oxford University
Lines: 6
Message-ID: <gg6qrh$afk$1@fred.mathworks.com>
References: <gg4co5$2cu$1@fred.mathworks.com> <gg4jc2$bck$1@fred.mathworks.com> <gg4kn6$2va$1@fred.mathworks.com> <gg4mdj$sjg$1@fred.mathworks.com> <gg4o3u$qfh$1@fred.mathworks.com> <gg4pkl$h47$1@fred.mathworks.com> <gg53fl$f0n$1@fred.mathworks.com> <gg56bi$fe6$1@fred.mathworks.com> <gg64up$sn8$1@fred.mathworks.com> <gg6k3u$ea4$1@fred.mathworks.com> <gg6nkd$bjq$1@fred.mathworks.com> <gg6ovh$4df$1@fred.mathworks.com>
Reply-To: <HIDDEN>
NNTP-Posting-Host: webapp-02-blr.mathworks.com
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 8bit
X-Trace: fred.mathworks.com 1227288241 10740 172.30.248.37 (21 Nov 2008 17:24:01 GMT)
X-Complaints-To: news@mathworks.com
NNTP-Posting-Date: Fri, 21 Nov 2008 17:24:01 +0000 (UTC)
X-Newsreader: MATLAB Central Newsreader 1073021
Xref: news.mathworks.com comp.soft-sys.matlab:502347


"Matt" wrote:
> As I was saying, the technique is a combintion of sinc-interpolation and subsampling operations...

I agree. However, sinc filters have long tails, so using them can be slow, and slower still the more you want to reduce your image (as the filters get larger). This method gets faster (the ifft2 bit, anyway) the more you downsize. Shame about the ripples...

Anyway, Kevin, I hope we've helped.