SV: Canned Epson Profiles and black point + linear GCR
SV: Canned Epson Profiles and black point + linear GCR
- Subject: SV: Canned Epson Profiles and black point + linear GCR
- From: Sören <email@hidden>
- Date: Mon, 26 Jul 2004 15:28:38 +0200
Eric,
I would like to know how you are tweaking the curves to be able to do what
the text below from Mark Levine says..
I can not use the MaxK and tweak the cyan or magenta to follow the black
curve as I want
I certainly would like to know if there is a way around it
Regards
Soren
About the "linear GCR" curve. There is a distinction between MonacoPROFILER
black-curves and others: in MonacoPROFILER, the user can fully customize the
curve. What that means is that the user can control both start and max
endpoints - as well as curve shape. The user is allowed to "snap" points
onto the black curve and build any shape they wish - including linear. While
we are talking about the black curve, I should also point out the curve
metric. The next time you are in MonacoPROFILER, check out the scale at the
bottom of the curve area - you will notice it goes from 100 (white) to 0
(black). That's because the black generation in based on the conversion from
Lab to device. The black start is actually in L*, so you can figure out at
exactly what incoming L* value that you will start to write black.
Lastly, GCR does not affect the properties of the ink or the media, only how
output recipes are built. To have consistency between looking neutral and
measuring neutral is at the intersection of a media's physical attributes
and a user's color perception (in other words, it's subjective at best). You
CAN reduce metamerisms is grays by reducing the amount of 3-color component
in the separation - which is what manufacturers like Colorbyte do, and what
users of MonacoPROFILER do when they use a linear GCR curve. Don't be so
surprised that Monaco and Gretag have unique features. I think that we are
still a ways off from seeing one package eclipse the feature set of the
other. Or........maybe we're not........ ; )
-----Ursprungligt meddelande-----
Fren: email@hidden [
mailto:email@hidden]
Skickat: den 26 juli 2004 14:41
Till: ColorSync Users
Kopia: email@hidden
Dmne: Re: Canned Epson Profiles and black point + linear GCR
>
I also recently find out trough
>
this list that an important future like "linear GCR" curve, to be able to
>
fully customize the curve in GCR is only available in MonacoProfiler... it
>
seem like I got the wrong software... another 3k - 4.5k US$ :(
Hold on there! PM 5 is fully capable of tweaking the black channel
generation to your heart's content. They may not call it "linear GCR" like
Monaco does, but the control is all there. Try using the Max K setting in
ProfileMaker...
I am assuming you are talking about building a CMYK inkjet profile through a
RIP, as you do not have control over the K generation through the RGB
driver.
Eric Bullock
Color Guy
Hecht's/Strawbridge's Advertising
685 N. Glebe Road
Arlington, VA 22203
703.247.2391
email@hidden
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