Hmmm.....MAC.....I'm out of my element now. I'm a PC guy and use the QTR Gui interface. Someone else will need to guide you on this. Lou --- In QuadtoneRIP@yahoogroups.com, "scott.romans" <scott.romans@...> wrote: > > Lou, Thanks so much for the response. I neglected to mention that I am running all this on > Mac OS X, so I don't have the QTR GUI with Curve Creation module/Linearization tab. > Wouldn't that figure! Please let me step back and detail what I do have: > > I printed the 21-step wedge w/o any profiling or changes and then spot measured with > PrintFix Pro device. This generated a text file with a list such as follows: > > 1 96.76 > 2 92.53 > 3 88.14 > > etc. I saved the list as a text file. The last few values are very bunched up i.e., 20=20.76 > and 21=20.75. When I have printed on the Arches paper, I've had best results using the > Moab Entrada FANat Curve, but as these numbers indicate, the shadow detail is a bit > blocked up. I was hoping to get very similar results as are produced with the Moab curve, > but open up the shadow detail. > > So I take the txt file, and I can do two things: when I drop it in the QTR-Create-ICC script > in the QTR downloaded Eye-One folder, I get back another txt file, this time with step > values in 5% increments, Density values, and Lab values that match my readings. In > addition, there is the L curve, and I can see where the L's start to curve downward at step > 95 and 100. In addition, I get an icc profile back. > > Alternatively, when I drop my original txt in QTR-Linearize-Data, I get back a similar txt > file with the same step, density, LAB, and curve data, but this time the last line reads > "LINEARIZE="96.76 92.53 88.14 ... 20.75". None of the values change from my original > readings. > > Now that I have these files, I am not sure how to use them to accomplish my goal of > opening up the last bit of shadows. I had assumed I would ultimately end up with another > curve to choose from in my QTR printer dialog box that would produce desired results. > Am I supposed to use the txt file with the Linearize message to create a curve or am I > supposed to use the icc profile? If so where do I put these files or how do I use them? > > I did try running a print with my QTR-ArchesInfinity.icc profile as both the Proof and as > the Printer Profile (letting Photoshop manage color); in the QTR printer dialog box, I didn't > select any curve because I don't have any new option to choose from. This generated a > very ugly, muddy print--obviously incorrect. > > If anyone could give guidance on how to properly use the icc profile or the linearize txt file > in a Mac OS X context, I'd be grateful! > > Thanks much. > > Scott--- In QuadtoneRIP@yahoogroups.com, "Louis Dina" <lou@> wrote: > > > > Scott,
Message
Re: Question about linearizing a QuadToneRIP Curve
2007-12-08 by Louis Dina
Attachments
- No local attachments were found for this message.