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Re: Re IDL w/ 12-bit grayscale? [message #48276 is a reply to message #48275]

Mon, 03 April 2006 09:41

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

Ertel, KG (Klaus) wrote:
> Hello Mike,
>
> Is it really worth the hassle? My guess would be that you can't
> distinguish more than, say, 10 grey levels by eye. ...

Try this:

image = rebin(replicate(1,256)#indgen(256),1024,1024,/sample)
tvscl,image/16
tvscl,image/8
tvscl,image/4
tvscl,image/2

I could still easily detect the jumps in brightness level with image/4.
It was a little bit harder for image/2, but I think I could still see
them.

> ... 12 bits would give
> you 4096 grey levels, slight overkill. I very much prefer false colour
> representations anyway.

I agree - 4096 grey levels is overkill.

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[Message index]

		Re: Re IDL w/ 12-bit grayscale? By: Andrew Cool on Tue, 04 April 2006 20:33
		Re: Re IDL w/ 12-bit grayscale? By: George N. White III on Tue, 04 April 2006 16:08
		Re: Re IDL w/ 12-bit grayscale? By: David Fanning on Mon, 03 April 2006 19:38
		Re: Re IDL w/ 12-bit grayscale? By: Andrew Cool on Mon, 03 April 2006 18:14
		Re: Re IDL w/ 12-bit grayscale? By: JD Smith on Mon, 03 April 2006 16:19
		Re: Re IDL w/ 12-bit grayscale? By: David Fanning on Mon, 03 April 2006 09:53
		Re: Re IDL w/ 12-bit grayscale? By: James Kuyper on Mon, 03 April 2006 09:41

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