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Re: New Image Processing Routines [message #48442 is a reply to message #47726]

Tue, 25 April 2006 06:19

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Marshall Perrin writes:

> The scenario is this. I have a couple of images which I want to display
> with the same scaling, and then I also want to display a color bar.
> I want to ensure that all the images have precisely the same scaling,
> so I say
> minval = min(image1) < min(image2) < min(image3)
> maxval = min(image1) > min(image2) > min(image3)
>
> and then I can call
> tvimage,asinhscl(image1,min=minval,max=maxval)
> tvimage,asinhscl(image2,min=minval,max=maxval)
> tvimage,asinhscl(image3,min=minval,max=maxval)
>
> However, this did *NOT* do what I expected. Pixels in the images which should
> have had the exact same output greyscale ended up having slightly different
> values.

Sigh... I had something else planned for this morning. :-(

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.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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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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