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Re: Display Gifs, each w/diff color tables? [message #16253 is a reply to message #16252]

Mon, 12 July 1999 00:00

Liam Gumley
Messages: 473
Registered: November 1994

Senior Member

rmlongfield@my-deja.com wrote:
> Here's a question I haven't seen discussed yet. I have several
> different GIF files given to me by several sources. I can read and
> display them individually. However, I can't look at them allat the same
> time. This is, I believe, due to the fact that the GIF files come with
> their own color tables. Every time a new one is loaded, the color table
> from the previous one is re-defined. I have tried the
> "split table" technique outlined in DWF's book, but it doesn't work
> because some of the GIF images fill in all the r,g,b arrays.

Rose,

If you have a 24-bit display, try this in a new IDL session:

;- Set display to 24-bit decomposed mode
device, true=24, decomposed=0, retain=2
if !d.n_colors le 256 then message, '24-bit mode unavailable'

;- Open a window
window, /free, xsize=950, ysize=700

;- Display the first GIF
read_gif, 'file1.gif', image, r, g, b
tvlct, r, g, b
tv, image, 0, 0

;- Display the second GIF
read_gif, 'file2.gif', image, r, g, b
tvlct, r, g, b
tv, image, 475, 0

Cheers,
Liam.

--
Liam E. Gumley
Space Science and Engineering Center, UW-Madison
http://cimss.ssec.wisc.edu/~gumley

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[Message index]

		Re: Display Gifs, each w/diff color tables? By: Liam Gumley on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: davidf on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: davidf on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: rmlongfield on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: Liam Gumley on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: davidf on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: steinhh on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: rmlongfield on Tue, 13 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: davidf on Mon, 12 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: Liam Gumley on Mon, 12 July 1999 00:00
		Re: Display Gifs, each w/diff color tables? By: Liam Gumley on Mon, 12 July 1999 00:00

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