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Re: New Image Processing Routines [message #48538 is a reply to message #48442]

Tue, 25 April 2006 09:38

Marshall Perrin
Messages: 44
Registered: December 2005

Member

David Fanning <davidf@dfanning.com> wrote:
> Sigh... I had something else planned for this morning. :-(

The best-laid plans of mice and IDL programmers... If it makes you
feel any better, I was supposed to be doing real work on my thesis
these last few days, instead of just figuring out how to scale pretty
pictures for my thesis. :-)

> Let me ask you a question, though, before I get started.
> In this scenario, do the original images have starting values
> between 0 and 1? Driving back from tennis last night I
> had a sudden dark thought that this could be the source of
> a problem I thought I saw the other day. This message
> casts an ominous pall on an already gloomy day here in Colorado.

In this case, yes, most of the pixels in the original images were
between 0 and 0.5, not for any fundamental reason but because that's where
the values happened to fall in the units I was working in. There were a lot
of slightly-negative pixels too, from read noise, so the total image range
was something like -0.01 to 0.5.

- 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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