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Re: subpixel image movement by bicubic interpolation?
- Subject: Re: subpixel image movement by bicubic interpolation?
- From: meinel(at)aero.org
- Date: Thu, 04 Jun 1998 13:32:15 GMT
- Newsgroups: comp.lang.idl-pvwave
- Organization: Deja News - The Leader in Internet Discussion
- References: <35757C9B.5E9AD577@as.arizona.edu>
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:11165
In article <35757C9B.5E9AD577@as.arizona.edu>,
Dyer Lytle <email@example.com> wrote:
> Hello all
> I have an IDL program that requires images to be moved by
> very small amounts, often as little as one hundredth of a
> So I thought I'd ask if anyone has a sub-pixel image movement
> routine based on bicubic interpolation that they would be willing
> to share.
Here's a couple of items of interest for image processing:
1) You are not moving the image by 1/100 pixel -- you are increasing your
measurement uncertainty by 1/100 pixel.
2) *ALL* image interpolation methods introduce non-physical artifacts.
For your particular case, I recommend that you hike across the street and talk
to Bobby Hunt (firstname.lastname@example.org). He could give you some suggestions on
what to do with your data.
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