Re: OFF TOPIC: 24-bit-per-pixel limit to Gdk RGB ?
- From: TORRI Vincent <Vincent Torri math u-bordeaux fr>
- To: Peter Finderup Lund <firefly diku dk>
- Cc: Joni Kahara <joni kahara visi fi>, Thomas Cameron <tom ceisystems com>, <rsmith xs4all nl>, <gtk-app-devel-list gnome org>
- Subject: Re: OFF TOPIC: 24-bit-per-pixel limit to Gdk RGB ?
- Date: Wed, 19 Feb 2003 11:03:49 +0100 (CET)
On Wed, 19 Feb 2003, Peter Finderup Lund wrote:
On Wed, 19 Feb 2003, Joni Kahara wrote:
I think that is incorrect. The eye is much more sensitive to
frequency (colour), than to intensity. An average (human) test
subject can distinguish between about two dozen different gray
levels (Gonzalez & Woods/2e).
We are good at detecting edges between slightly different intensitites,
even of the same colour. We are extremely bad at detecting the
differences if there is some other colour or intensity in between.
Built-in edge detectors at work.
Also note that I wrote /spatial/.
I'm afraid I can't come up with a good reference at a moment's notice --
some of books have been lent out to others, otherwise I would have dug it
out and either apologized profusely or whacked you on your head with it ;)
Perhaps those who are interested can look at that. There is LOTS of links
and I find it interesting :
another one :
Likewise, the ear is more sensitive to the pitch of a voice,
than to its amplitude.
Different sensoric system, can't really be compared. At least not like
"Of course, I'm not unbiased, but in my humble opinion, I've
gotten close to something that I can be really proud of."
-- Knuth on The Art of Computer Programming.
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