Re: The Vivid Setting
Re: The Vivid Setting
- Subject: Re: The Vivid Setting
- From: Chris Murphy <email@hidden>
- Date: Mon, 1 Jul 2002 08:06:45 -0600
email@hidden writes:
>
Although I haven't done the tests myself to prove it, the Photo
>
Enhance4 setting is built around a much fuller image content analysis
>
and therefore is completely useless for printing with profiles too
>
(even worse than Vivid), although it may be great for printing
>
snapshots without profiles, which is what it was intended for. So
>
forget high-end user control with Photo Enhance4 too. Too bad,
>
because it can print a very impressive, albeit cool, gray gradient.
Joe,
I have made several profiles for Epson 1270, 1280, and Epson 970. These
printers, on regular photo paper are unprofilable with either the
automatic or no color adjust profile. At least I was unable to get
acceptable results. The color was good, but in shadows there was major
posterization. People's hair would look cartoonish as it totally lost
detail.
However, profiling these printers with PhotoEnhance4, with the two
resulting checkboxes (can't remember their names) unchecked allowed me
to profile the printers successfully.
>
So if you want the full gamut, there's still no choice except NCA,
>
with its typically bad to awful non-linearity. I have managed to get
>
an excellent profile for Premium Luster for the 9600/7600 despite the
>
extreme non-linearity, which is tricky, to say the least. The best
>
hope is for a better choice in the driver that gives the full gamut,
>
is repeatable, and is reasonably linear without any severe
>
crossovers, or else to get direct, low-level control over the tables
>
in the driver (v. complicated to use), or both.
The problem is that Epson does screening at the same time they do
separations. So you have RGB pixels to start out with, and as it goes
through Epson's screening algorithm you end up with CcMmYK dots (or CMYK
dots with non-Photo models). Because of this, there is a requirement for
color managment occuring internal to the driver. We are forced into
profiling the device as RGB in a color managed condition - so effectively
we have no choice but to break the rule of double color management with
these printers. Just like Photoshop 6 and 7, no color management is
simply not an option. Some color management must occur. So far, Epson
hasn't come up with a well linearized, gray balanced, and appropriate GCR
No Color Adjust RGB-CMYK conversion in their driver yet. It's doing
something because it has to do something, but what it's doing is very bad
with some models of Epsonp printers, and it is specific to the paper type
setting. The heavy weight paper setting has reasonable NCA behavior and
is profilable with the same models of printers listed above.
Chris Murphy
Color Remedies (tm)
Boulder, CO
303-415-9932
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