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Re: unwanted color bands in image display [message #31366 is a reply to message #31364]

Fri, 28 June 2002 13:34

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Asti Bhatt (astib@cc.usu.edu) writes:

> When I try to display image with TV or TVSCL, or for that matter,
> store as a PS and then view it, it always shows annoying color bands
> or lines in the image. These bands are generally red or blue,
> depending on the monitor properties I guess. I tried to use, device,
> decomposed=0, but that doesn't make any difference. I am quite
> frustrated with this thing, and hence I like to use LIVE TOOLS instead
> of TV things, but they have limited capabilities. Any suggestions for
> removing these color bands ?

I'm going to go way out on the limb and guess operator
error. The TV command is pretty well tested in IDL. I doubt
it is putting red and blue bands in your image. :-)

Tell us a bit more about your image. Is it byte data?
8-bit or 24-bit? Did you scale the data yourself? How
did you do it? How did you configure your device before
you displayed the data? Did you load a color table just
before you displayed the data? Are you sure red and blue
are not part of your color table? How did you determine
this? Etc.

Have you tried something like TVIMAGE or IMDISP to display
your image? Sometimes getting everything set up just right
can be a bit of a pain.

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: unwanted color bands in image display By: David Fanning on Wed, 03 July 2002 11:21
		Re: unwanted color bands in image display By: astib on Wed, 03 July 2002 10:57
		Re: unwanted color bands in image display By: Craig Markwardt on Fri, 28 June 2002 14:52
		Re: unwanted color bands in image display By: David Fanning on Fri, 28 June 2002 14:37
		Re: unwanted color bands in image display By: Craig Markwardt on Fri, 28 June 2002 14:09
		Re: unwanted color bands in image display By: Liam E. Gumley on Fri, 28 June 2002 14:07
		Re: unwanted color bands in image display By: David Fanning on Fri, 28 June 2002 13:34
		Re: unwanted color bands in image display By: JD Smith on Mon, 22 July 2002 11:59

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