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- Path: 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
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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/
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