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Re: TVRD to make GIF's with 24-bit color [message #17163 is a reply to message #17151]

Wed, 15 September 1999 00:00

Liam Gumley
Messages: 473
Registered: November 1994

Senior Member

Joe Means wrote:

Joe, just so we're clear: GIF files can only contain 8-bit images. If
you have displayed a 24-bit image and you wish to save it as a GIF, then
you must use TVRD(TRUE=1) and COLOR_QUAN to produce an 8-bit pseudocolor
image. If you wish to save a truecolor 24-bit image, then the JPEG and
TIFF formats are a good choice.

The SAVEIMAGE procedure mentioned in my previous post handles all of
this automatically. You just pick the output format, e.g.

IDL> saveimage, 'image.gif' ; GIF is the default
IDL> saveimage, 'image.jpg', /jpeg
IDL> saveimage, 'image.tif', /tiff

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: TVRD to make GIF's with 24-bit color By: Joe Means on Wed, 15 September 1999 00:00
		Re: TVRD to make GIF's with 24-bit color By: Liam Gumley on Wed, 15 September 1999 00:00
		Re: TVRD to make GIF's with 24-bit color By: Liam Gumley on Wed, 15 September 1999 00:00
		Re: TVRD to make GIF's with 24-bit color By: R.Bauer on Wed, 15 September 1999 00:00
		Re: TVRD to make GIF's with 24-bit color By: davidf on Tue, 14 September 1999 00:00

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