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Re: Image Contrast Enhancement [message #47660 is a reply to message #47655]

Mon, 27 February 2006 08:20

Patrick Broos
Messages: 27
Registered: December 1996

Junior Member

David,

In case it helps I'll mention a three little facts (which you probably
already know very well) about the "astronomy market" for constructing
color composite images.

* The HASTROM tool in Landsman's library is useful for aligning
mulitple FITS images.

* Probably most of the color composites made during data analysis are
made by the "ds9" tool.

* Probably most of the color composites made for Education and Public
Outreach purposes are made by Photoshop using the FITS Liberator
plugin: http://www.spacetelescope.org/projects/fits_liberator/
(Photoshop's undocumented magic algorithm for combining images allows
one to "combine" more than three data sets, e.g. you can have red,
blue, green, brown, tangarine, chartreuse, etc. components.)

I'm delighted that you're taking seriously Robert Lupton's excellent
criticism of the embarrassing saturate-to-white color model used
throughout astronomy (including ds9 and Photoshop). A nice GUI to
construct color composites the right way would be a help to astronomy.
I've written a lame version of such a tool but I look forward to your
more professional solution to the problem.

Best of luck,
Patrick
Chandra-ACIS Team at Penn State

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[Message index]

		Re: Image Contrast Enhancement By: JD Smith on Mon, 27 February 2006 15:21
		Re: Image Contrast Enhancement By: David Fanning on Mon, 27 February 2006 14:42
		Re: Image Contrast Enhancement By: JD Smith on Mon, 27 February 2006 13:55
		Re: Image Contrast Enhancement By: news.verizon.net on Mon, 27 February 2006 10:22
		Re: Image Contrast Enhancement By: Patrick Broos on Mon, 27 February 2006 08:20
		Re: Image Contrast Enhancement By: David Fanning on Mon, 27 February 2006 07:46
		Re: Image Contrast Enhancement By: David Fanning on Mon, 27 February 2006 15:47

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