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Re: IDL and 24 Bits--help + added question [message #2211 is a reply to message #2210]

Wed, 22 June 1994 06:04

thompson
Messages: 584
Registered: August 1991

Senior Member

grunes@imsy1.nrl.navy.mil (Mitchell R Grunes) writes:

> Actually, I have been trying to find a way to simulate 24 bit color for
> TV commands on 8 bit color displays (e.g., Sun, VGA...I think it could
> be done with some fancy dithering, but I don't want to do it). Does
> anyone have (or know of) a routine to do it?

Look at the documentation for the IDL built-in routine COLOR_QUAN. This takes
pictures separated into red, green, and blue images (i.e. 24 bit color) and
combines them together into a single 8 bit image that can be displayed with an
appropriate color table to simulate a true-color image. If you use it with the
/CUBE qualifier you can then use the same color table for multiple images.
Otherwise it generates a separate optimal color table for each image.

Bill Thompson

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[Message index]

		Re: IDL and 24 Bits--help + added question By: grunes on Wed, 22 June 1994 08:16
		Re: IDL and 24 Bits--help + added question By: velt on Wed, 22 June 1994 06:22
		Re: IDL and 24 Bits--help + added question By: thompson on Wed, 22 June 1994 06:04
		Re: IDL and 24 Bits--help + added question By: velt on Tue, 21 June 1994 10:07
		Re: IDL and 24 Bits--help + added question By: grunes on Tue, 21 June 1994 07:32
		Re: IDL and 24 Bits--help + added question By: rmm on Fri, 24 June 1994 08:30

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