Re: 16-bit vs 8-bit to Epson printers
Re: 16-bit vs 8-bit to Epson printers
- Subject: Re: 16-bit vs 8-bit to Epson printers
- From: "Ernst Dinkla" <email@hidden>
- Date: Fri, 18 Jul 2003 13:19:08 +0200
----- Original Message -----
From: "Lee Hershenson" <email@hidden>
To: <>; "lmh5" <email@hidden>
Sent: Thursday, July 17, 2003 10:12 PM
Subject: 16-bit vs 8-bit to Epson printers
>
generated if you have a high-bit file. But if there were some
way you
>
could get your printer actually to produce a grayscale with
more than
>
256 discrete steps -- or even as many as 128 steps-- I would
like to
>
know what isthe basis (with citations, please) that any of the
>
participants in this discussion have for believing that that
your vision
>
could distinguish that many?
This has been discussed before on more lists. Without doubt it
would be a very nice picture when all the 256 steps were
accurately printed and at the right separations to the eye. I
guess most vision tests done are based on a normal photographic
range of tones, same lighting, each step next to its right
neighbours, no change in viewing distance. In B&W photography
with quad printing + an additional varnish coating it is possible
to go beyond 2,5 D for black. That is a long range. This is for
gallery work. Then it becomes more than a greywedge that you are
looking at, parts of the picture will be looked at, angles
changed etc, it also isn't the way you look at magazine prints or
family pics. Maybe you will not see the steps of the 256 tones
separated, nice for gradations then, but you can see the 128
steps separated and it is then nice that the 128 steps are at
optically equal distances. All that and more is accumulated when
an exhibition print is looked at and I'm quite convinced that you
will notice the difference between one that falls just within the
eye measurements criteria and one that goes beyond. This comes
near "Gestalt", I hate the word and it covers context of the
picture as well but I often think it is overlooked in all the
pure scientific tests. In stone printing the grain of a washed
tusche isn't visible at the right viewing distance for a 3 by 4
feet print, it will be recorded by your eye when you look at it
from a shorter distance and that impression will add to the total
one way or another. Most wide format inkjet printers were quite
capable to give us the optical quality for large prints five
years ago, there still is development going on in drivers and
printers to increase the optical quality. There must be a reason
for that.
Ernst
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