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Re: IDL w/ 12-bit grayscale? [message #48281 is a reply to message #48115]

Mon, 03 April 2006 07:22

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Mike Chinander writes:

> Does anyone have experience using IDL to display 12-bit grayscale images on hardware that
> supports it while maintaining full bit-depth of the images? I'm using IDL on Linux and one
> of the available X11 visuals is GrayScale with depth 12. I used .Xdefaults settings to
> force IDL to use this visual. TVSCL works but using the /words keyword with TVSCL results
> in the error that the hardware doesn't support 16-bits per pixel and would sometimes crash
> the X server.

TVSCL!? Doesn't that sort of defeat the whole
purpose of having 12-bit values? I would have
thought a TV of integer data, scaled into the
range of 0 to 2^12 (4096) would be something your
12-bit hardware would like.

> It seems the hardware must actually take 16-bits per pixel even though the
> depth resolution is only 12-bits.

I would hope so, or you are going to have to write your
own LIXUX kernel, too, probably. :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		IDL w/ 12-bit grayscale? By: mchinand on Tue, 28 March 2006 08:45
		Re: IDL w/ 12-bit grayscale? By: mchinand on Wed, 05 April 2006 09:12
		Re: IDL w/ 12-bit grayscale? By: Karl Schultz on Mon, 03 April 2006 12:10
		Re: IDL w/ 12-bit grayscale? By: mchinand on Mon, 03 April 2006 10:00
		Re: IDL w/ 12-bit grayscale? By: David Fanning on Mon, 03 April 2006 07:22

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