Article View: comp.graphics.algorithms
Article #45Re: 2D image rotation problem
From: Martin Leese - OMG
Date: Tue, 16 Jan 1996 15:02
Date: Tue, 16 Jan 1996 15:02
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On 15 Jan 1996 20:04:49 GMT Xiaoyi Wu (xiaoyi@bmecg.bme.ohio-state.edu) wrote: >> Just thought I might make things a bit more clear >> here: >> The FAQ talked about doing a reverse rotation to >> avoid holes in the rotated image, which I followed. >> The question is: even if you do it the reverse way, >> you still end up with some pixels that fall out >> of the range of the source image. How do you deal >> with this - for now, I just arbitrarily assign them >> the same value as the boundary pixels. Is there a >> better way? It really depends on your application. Typically, you would specify a background colour and assign this to the "outside" pixels. Alternatively, you could crop the output image so there aren't any "outside" pixels. The key, here, is to think about your application. It really depends on your application. Regards, Martin E-mail: mleese@omg.unb.ca WWW: http://www.omg.unb.ca/~mleese/ ________________________________________________________________________ Want to know how Ambisonics can improve the sound of your LPs and CDs? See the Ambisonic Surround Sound FAQ. Details on my WWW Home page.
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Path: arc1-ca.pugleaf.net!news.unb.ca!hudson!mleese From: mleese@hudson.CS.unb.ca (Martin Leese - OMG) Newsgroups: comp.graphics.algorithms,comp.lang.c,sci.image.processing Subject: Re: 2D image rotation problem Followup-To: comp.graphics.algorithms,comp.lang.c,sci.image.processing Date: 16 Jan 1996 15:02:19 GMT Organization: Ocean Mapping Group, University of New Brunswick, Canada Distribution: world Message-ID: <4dgelr$b85@sol.sun.csd.unb.ca> References: <4de7gt$j0i@charm.magnus.acs.ohio-state.edu> <4dec11$jg5@charm.magnus.acs.ohio-state.edu> Reply-To: mleese@omg.unb.ca NNTP-Posting-Host: hudson.omg.unb.ca X-Newsreader: TIN [version 1.2 PL2]