Profiling+the+IPF5000+Using+Eye+One+Match+and+the+Atkinson+Targets

=Profiling the IPF5000 Using Eye One Match and the Atkinson Targets=


 * Written by Dan Wells**

1. Download target and reference file [|here] (I used the 4096 patch option, because it was the biggest target that would fit on a 17 inch roll without going lengthwise and wasting paper (he also has a 5200+ patch target, but that one is on 3 12x19 inch sheets!).

2. Print target from photoshop plugin

3. Use MeasureTool (from ProfileMaker Pro, but functions in demo mode) to read the target in - it is on 3 12x17 inch sheets, and is so large that you actually have to turn the sheets around in the EyeOne backing board to read the last 15 or so strips on each sheet (the darn target is longer than the backing board). Remember that when reading those last 15 strips with the target upside down, you have to read from right to left instead of left to right. MeasureTool cares about orientation! I'll eventually build a bigger backing board! Measure Tool has a number of settings for reading targets, and here's what I used:

In the Configure dialog box: EyeOne found automatically-spectral ON (default)

In the measurement window: Strips with gaps (it lets you choose between individual patches (yeah, right!), strips without gaps (which requires a scrambled target with a lot of contrast between adjacent patches) and strips with gaps (which is what the Atkinson target is)

All settings correct, spend about 45 minutes reading in 128 strips of patches and wishing you owned an iO or an iSIS...

4. Save the measurement file - Save As in the MeasureTool file menu - save it anywhere you like, although I drop it in EyeOne Match's measurement files folder.

4. Trick EyeOne Match. Remove the original reference file for the 918 patch target to a safe place, then replace it with the Atkinson target reference file, renaming the Atkinson file to the exact name of the 918 patch file. Note that you are playing with REFERENCE files, not the measurement file you just made. EyeOne Match will use an arbitrarily named measurement file, but is picky that the reference file describing the target is in exactly the right place, with the right name.

5. Select the "918" patch reference file - you'll know you have the imposter loaded because EyeOne Match will show a picture of the Atkinson target.

6. Load the measurement file and build the profile...

I'm going to try replacing other reference files - I just appear to have replaced the "easy CMYK" test chart (with about 100 patches) with a 1788 patch CMYK chart - I wonder if THAT will work - guess I'll try profiling the laser printer and find out!

It looks like EyeOne in "photo" license mode is limited to four test charts (three RGB and one CMYK, but they can be any four charts you want if you're willing to use MeasureTool to read them)... I haven't tried profiling with any of these except the Atkinson 4096 yet, but my copy of EyeOne Match now thinks that its four test charts are:

Its original 918 patch RGB chart Atkinson's 1728 patch chart - the biggest chart that will fit on letter paper Atkinson's 4096 patch chart

A 1788 patch CMYK chart replacing the sub-100 patch "Easy CMYK" chart.

Procedure for replacing target in EyeOne Match (step 4) from ColorWiki (http://www.colorwiki.com/wiki/More_Targets_for_i1Match Target, reference files and instructions from Bill Atkinson [|here].


 * Addendum:** I (Dan Wells) just made a couple of new profiles for the iPF5000, using Bill Atkinson's 4096 patch target. The first one I've tried printing from (Canon Bright Satin) is a substantial improvement over my previous profile (EyeOne Match's standard 918 patch target). Looking at it in ColorSync, the overall gamut is only slightly larger, and there are areas where the 918 patch profile actually has a larger gamut. However, I am more pleased with the colors on the paper with the Atkinson target profile (I think it is getting within-gamut colors in a more pleasing manner). I also have a new profile I made for Hahnemuhle Photo Rag 308, but haven't printed with it yet.

The Atkinson profiles (4096 patch version) are not for the faint of heart! The target is on 3 12x17 sheets, and takes about 45 minutes to read in with an EyeOne spectrophotometer. Of course, this is easier with roll paper than with sheets (the only vaguely appropriate sheet size would be 13x19), because a 12x17 off a roll is easy..

I tricked EyeOne Match into building a profile using the huge Atkinson target (although it won't read the target by itself). To read the target, I use MeasureTool, which is included in the free demo of ProfileMaker Pro (download from GretagMacbeth) and save the measurement file. The trick to getting EyeOne Match (which supposedly only builds profiles from its own targets) to use the saved file from the Atkinson target is to place the reference file for the Atkinson target EXACTLY where it expects to find the reference file for its own 918 patch target (it has to have the same name). Of course this means that you have to put the actual 918 patch reference file somewhere else if you ever want to use the 918 patch target (mine is in a folder called original inside the printer reference files folder).

=Creating Different Perceptual Mappings with Eye-One Match=


 * Written by Eric Chan**

When you create a custom printer profile using Eye One Match, the software uses a gamut mapping method for the Perceptual Intent called LOGO Colorful. There are two other gamut mapping methods (called Chroma Plus and Classic) which aren't accessible from the program itself. They only affect the Perceptual Intent.

If you would like to try one of the other gamut mapping methods instead of the default LOGO Colorful, you can edit the Config file (using any text editor) that is located in the same directory as the program itself.

If you want to use LOGO Chroma Plus, add this line to the Config file:

GamutMappingMethod=NewGamutMapping L0.3

If you want to use LOGO Classic, use this line instead:

GamutMappingMethod=DefaultGamutMapping

From one set of measurements, you can generate 3 profiles (one for each of the three perceptual gamut mapping methods) and use whichever one you like best. You can also make the choice of profile depending on the image.