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Re: flux-conserving image resampling? [message #47704 is a reply to message #47696]

Thu, 23 February 2006 09:39

Marshall Perrin
Messages: 44
Registered: December 2005

Member

Bringfried Stecklum <stecklum@tls-tautenburg.de> wrote:
> I did not check how well it preserves the flux. In any case, you can
> force the total flux of the output image to be the same as that of the
> input image.

As Henry points out, this isn't really sufficient to ensure that the
original flux stays in the right parts of the final image. That's important
for my particular application, which is a dual-beam differential polarimeter.
I'm trying to take a very precise difference between two images of
the same star taken simultaneously on different parts of the detector,
and thus merely enforcing total flux conservation lets light slop between
the two stellar images (and the background too). Yes, it's a small effect,
but I'm trying to -measure- a fairly small difference in the first place and
thus care about this.

- Marshall

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[Message index]

		Re: flux-conserving image resampling? By: edward.s.meinel@aero. on Fri, 24 February 2006 08:04
		Re: flux-conserving image resampling? By: Bringfried Stecklum on Fri, 24 February 2006 01:03
		Re: flux-conserving image resampling? By: Marshall Perrin on Thu, 23 February 2006 09:39
		Re: flux-conserving image resampling? By: henrygroe on Thu, 23 February 2006 08:00
		Re: flux-conserving image resampling? By: Bringfried Stecklum on Thu, 23 February 2006 00:32

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