[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: color table conversion
- Subject: Re: color table conversion
- From: Stein Vidar Hagfors Haugan <shaugan(at)esa.nascom.nasa.gov>
- Date: 18 May 2001 15:28:13 -0400
- Newsgroups: comp.lang.idl-pvwave
- Organization: NASA Goddard Space Flight Center (skates.gsfc.nasa.gov)
- References: <3B0546CE.EDE7EC0C@physics.rutgers.edu>
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:24994
Arend Sluis <sluis@physics.rutgers.edu> writes:
> Hi,
>
> this is a bit of an arcane topic, but here goes. I would like to use the
> CIE Lab or CIE Luv color system to choose the colors that I want to load
> into the IDL color table. The conversion from either of these color
> systems to CIE XYZ is standard, the problem is the conversion from CIE
> XYZ to RGB in IDL. I found one conversion (in the procedure PSEUDO), but
> it doesn't seem to be correct, since white is not in the correct place,
> i.e. Lab = (*,0.,0.). Does anyone have any ideas how to find the correct
> conversion, or how the folks at rsinc found their XYZ->RGB
> transformation to begin with?!
Have you looked at http://www.ece.mcgill.ca/~raed/image.html "and
references therein.."?
--
--------------------------------------------------------------------------
Stein Vidar Hagfors Haugan
ESA SOHO SOC/European Space Agency Science Operations Coordinator for SOHO
NASA Goddard Space Flight Center, Email: shaugan@esa.nascom.nasa.gov
Mail Code 682.3, Bld. 26, Room G-1, Tel.: 1-301-286-9028/240-354-6066
Greenbelt, Maryland 20771, USA. Fax: 1-301-286-0264
--------------------------------------------------------------------------