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Re: New Image Processing Routines [message #48474 is a reply to message #47726]

Fri, 21 April 2006 12:31

Marshall Perrin
Messages: 44
Registered: December 2005

Member

Marshall Perrin <mperrin+news@cymric.berkeley.edu> wrote:
> Another thing possibly worth adding to the documentation is that if
> you have some estimate of the noise in your image, then setting
> nonlinearity = 1./noiselevel (or equivalently, beta=noiselevel) does
> a decent job at showing the full dynamic range of the image from the
> peak down to the read noise.

Never mind, I take the above back. It was only true because I happened
to be using an input data set whose range was roughly 0-1. For inputs
with other ranges, the above doesn't work out, because the ratio
between beta and the input is changed by the first call to
scale_vector. Still, the basic idea is right, there's just a few
constants to keep track of. I'll have to play with this a bit more.

- Marshall

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[Message index]

		New Image Processing Routines By: David Fanning on Wed, 22 February 2006 12:47
		Re: New Image Processing Routines By: David Fanning on Tue, 25 April 2006 06:19
		Re: New Image Processing Routines By: Marshall Perrin on Tue, 25 April 2006 09:38
		Re: New Image Processing Routines By: Marshall Perrin on Mon, 24 April 2006 23:48
		Re: New Image Processing Routines By: Marshall Perrin on Mon, 24 April 2006 21:47
		Re: New Image Processing Routines By: David Fanning on Tue, 25 April 2006 09:01
		Re: New Image Processing Routines By: David Fanning on Mon, 24 April 2006 12:24
		Re: New Image Processing Routines By: Marshall Perrin on Fri, 21 April 2006 12:31
		Re: New Image Processing Routines By: Marshall Perrin on Fri, 21 April 2006 10:24
		Re: New Image Processing Routines By: David Fanning on Fri, 21 April 2006 06:45

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