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Re: Medical Imaging Question [message #16666 is a reply to message #16618]

Sun, 08 August 1999 00:00

levick
Messages: 1
Registered: August 1999

Junior Member

In article <37AA0BAA.99AD6EC5@bu.edu>,
Axel vom Endt <endt@bu.edu> wrote:
> David Fanning wrote:
>>
>> I mean by this that I want to "see" 4094 shades of gray.
>
> I'm not sure about the reference for this, but I read somewhere that
the
> human eye cannot even distinguish between 256 levels of gray. Isn't
that
> the reason to use the fancy color tables in IDL?
>

Incorrect. Most studies find that the nuumber of brightness jnd's is
about 450.

Ex

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[Message index]

		Medical Imaging Question By: davidf on Thu, 05 August 1999 00:00
		Re: Medical Imaging Question By: pford on Wed, 11 August 1999 00:00
		Re: Medical Imaging Question By: Struan Gray on Mon, 09 August 1999 00:00
		Re: Medical Imaging Question By: levick on Sun, 08 August 1999 00:00
		Re: Medical Imaging Question By: Struan Gray on Fri, 06 August 1999 00:00
		Re: Medical Imaging Question By: Struan Gray on Fri, 06 August 1999 00:00
		Re: Medical Imaging Question By: m218003 on Mon, 16 August 1999 00:00
		Re: Medical Imaging Question By: David Fenyes on Fri, 13 August 1999 00:00
		Re: Medical Imaging Question By: edward.s.meinel on Wed, 18 August 1999 00:00
		Re: Medical Imaging Question By: Peter Clinch on Wed, 18 August 1999 00:00
		Re: Medical Imaging Question By: Struan Gray on Tue, 17 August 1999 00:00
		Re: Medical Imaging Question By: davidf on Tue, 17 August 1999 00:00
		Re: Medical Imaging Question By: Pavel Romashkin on Tue, 17 August 1999 00:00
		Re: Medical Imaging Question By: davidf on Tue, 17 August 1999 00:00
		Re: Medical Imaging Question By: steinhh on Tue, 17 August 1999 00:00
		Re: Medical Imaging Question By: Patrick V. Ford on Mon, 16 August 1999 00:00
		Re: Medical Imaging Question By: davidf on Mon, 16 August 1999 00:00

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