Re: colorsync-users digest, Vol 3 #314 - 5 msgs
Re: colorsync-users digest, Vol 3 #314 - 5 msgs
- Subject: Re: colorsync-users digest, Vol 3 #314 - 5 msgs
- From: "Joseph A. Castay" <email@hidden>
- Date: Sun, 21 Jul 2002 21:34:08 -0400
Consider this:
Art Work
Photo Transparency Copy
Scanner (which ever)
Output Device
Art Work
Scan Back Camera
Output Device
Which process has the most limitation? (I think the film)
Which process will produce the best overall quality? (I think the scan
back)
If there is a newer technology that will do a better job, please tell me
about it? I am interested.
There are some great flat-bed and drum scanners out there. However, if
the film already has the limitation then does a scanner recreate what is
not there...
Input devices are optimized and tweaked and profiled, and played with to
no end. Regardless, output devices have fiscal limitations that make
reproducing exactly what a transparency or scan back have to offer
difficult.
A good discussion about "CMY and RGB - pigments and dyes" may be a
discussion of its own. A discussion about "why some colors do not
reproduce well" can began with Kodak's old paper on the subject.
Printers use to use these documents to help the art director understand
why such things happen.
Joseph
On Sunday, July 21, 2002, at 01:04 AM, colorsync-users-
email@hidden wrote:
on 7/20/02 4:27 AM, Tony Riley wrote:
I think the shortcomings in reproducing rgb pigments
in paintings...
There's no such thing as RGB pigments. RGB is additive color,
CMY is
subtractive. To put another way, RGB is light and CMY is
pigment/paint/dye.
Of course, I could be wrong. :-)
There are RGB pigments, dyes, phosphors and I guess even other
colorants. Problem is you need a lot of light to get an additive
RGB system of colourmixing working. Monitor and television CRT's
are the best examples of RGB additive mixing. Lumiere's
Autochrome, early Agfachrome, Finlay etc slide films showed that
RGB additive mixing was possible and the first was a commercial
success. Polaroid did some attempts to bring additive RGB film
back as an instant 8 mm movie / 35 mm slide film. All those
systems used dyes though with their higher transparency. The
difference between RGB and CMY colourmixing is that the first has
to be additive and the second subtractive and the first needs a
lot more light than the second.
Ernst
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