Digital BW, The Print

----- Original Message -----
From: "Carolyn Frayn" <carolynfrayn@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Monday, August 05, 2002 1:29 PM
Subject: Re: [Digital BW] Number of tones was Re: Do inkjets dither or not?


(big snip)
>
> Isn't all this based on science yet to be disproven.  I'm curious how
anyone
> can say for certain how many tones, how many whatever, the human species
can
> determine.  Science hick that I am.

I believe that there have been studies done to determine how many tones a
person can see or what is the minimum density difference that can be
detected. I have heard result ranging from 100 to 1000+ and not enough
information was given about the trials to draw any conclusion.

One thing that is certain is that is varies from person to person. It is not
going to be a fixed value for everyone. On top of that it is going to vary
with each individual depending upon the situation. We all know that when we
move from extremes of light our irises expand or contract to adjust. In
addition the rods and cones in the retina also undergo adjustments. They can
also become fatigued or over saturated with a single color and adjust to
compensate. Ultimately it is not just our eyes but our brains as well. I
think that you have to look at the entire process of visual perception
including how our brain compensates and adjusts for the visual information
coming form the eyes.

(snip)

> > I think this list is called "DigitalBlackandWhiteThePrint".
> > Tyler
>
> Lately I believe it is called the "my opinion is the only one that
matters"
> show.
>
Yahoo won't let me use spaces so that would really run together. <G>

Martin