comp.lang.idl-pvwave archive: archive » Re: ION

Home » Public Forums » archive » Re: ION_IMAGE 8bit/24bit color

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: ION_IMAGE 8bit/24bit color [message #35329 is a reply to message #35327]

Wed, 11 June 2003 06:41

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Dan Dye writes:

> Thanks David. I did glean from TVImage the "Color_Quan" function.
>
> ------------< snip >-------------------
> The COLOR_QUAN function quantizes a TrueColor image and returns a
> pseudo-color image and palette to display the image on standard
> pseudo-color displays. The output image and palette can have from 2 to
> 256 colors.
>
> COLOR_QUAN solves the general problem of accurately displaying
> decomposed, TrueColor images, that contain a palette of up to 224
> colors, on pseudo-color displays that can only display 256 (or fewer)
> simultaneous colors.
> ------------< snip >-------------------
>
> tv, Color_Quan(picC,1,R,G,B,COLORS=255)
>
> This would seem to be the trick but the result looks poor compared to
> the truecolor image....

Well, in IDL (as in life) it is hard to have your
cake and eat it too.

Cheers,

David

P.S. Let's just say if your image has 16.7 million colors and
you have to pick 224 to display it, compromises will have to
be made. :-(

--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438
E-Mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/

Report message to a moderator

[Message index]

		Re: ION_IMAGE 8bit/24bit color By: David Fanning on Wed, 11 June 2003 08:06
		Re: ION_IMAGE 8bit/24bit color By: Liam E. Gumley on Wed, 11 June 2003 07:42
		Re: ION_IMAGE 8bit/24bit color By: David Fanning on Wed, 11 June 2003 06:41
		Re: ION_IMAGE 8bit/24bit color By: ddye on Wed, 11 June 2003 06:25
		Re: ION_IMAGE 8bit/24bit color By: David Fanning on Tue, 10 June 2003 16:18
		Re: ION_IMAGE 8bit/24bit color By: ddye on Thu, 12 June 2003 10:48
		Re: ION_IMAGE 8bit/24bit color By: Craig Markwardt on Wed, 11 June 2003 18:15

Previous Topic:	IDL Question - Opposite of WHERE?
Next Topic:	ION_IMAGE 8bit/24bit color

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 18:56:26 PDT 2025

Total time taken to generate the page: 0.40399 seconds