Digital BW, The Print

Roy & Tyler,

The converted ref file seems to be working very well Roy.  I also 
converted the 51 step file to RGB (used ColorLab to do it - just open 
special the ref file and set mode>RGB and it does all of the conversion 
calculation), but I haven't made any critical comparisons between the 
21 step and 51 step yet - step wedges from both compare well to the 
proofs.  This proofing method also works well for BO and compared to 
dot gain proof profiles is better because you also get the paper color 
effects incorporated into the proof and hence you get more accurate 
tonal proofing.  Since my 1270 was also loaded up with UT (original) 
inks I also generated some profiles for Paul's curves (the NCA warm, 
cool, neutral cool, and neutral warm with the RGB workflow) - also got 
good proofs, so this clearly can indeed be used for a variety of 
inksets and printing workflows.

Carl
On Wednesday, January 14, 2004, at 06:34  PM, Roy Harrington wrote:

> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Tyler Boley" 
> <tyler@t...>
> wrote:
>> Roy- Outstanding! This is probably obvious, but I want to doublecheck
>> with you. The values below look like RGB numbers, which suprises me a
>> tad for a profiling reference file, rather than LAB. So RGB values are
>> what Match wants to see?
>
> Yes, everything is based on RGB values presumably because that's what
> most people use.  Under the Eye-Match directory (folder)  there are
> TIFF target files -- lots of random color patches.  There's one called
> "i1 RGB  1.5.tif"  and under Reference files the file "i1 RGB 1.5.txt" 
> is
> a standard text file describing all the RGB values from the tif file.
>
> So instead of these files, I'm using my 21step wedge that was designed
> for eye-one reading Step-21-random.tif  in the Eye-One folder.
> I had a Ref file for it but in grayscale description instead of RGB.
> I just edited the Ref file into RGB values:
>       R = G = B = (100-gray) * 2.55
>
> Fortunately, i1Match is perfectly happy as long as the description
> Ref file matches what you actually scan.
>
>
>> Also, can I assume from your work here that I can create my own
>> targets and ref files as you have done? I'd like more than 21 patches,
>> I find these profiles don't predict some areas well, like 95 to 100%,
>> and more samples might help.
>
> I also have a 51 patch target that'll give you every 2%, I'll can send 
> you
> a new RGB Ref file for it.
>
>> You guys are smokin' now!
>
> I hadn't really thought about soft proofing much, except with the 
> eyeball
> custom dot gain.  But when Carl brought up the idea and what he
> had done, it was a terrific idea.
>
> Roy
>
>> Tyler
>>
>> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Roy Harrington"
>> <roy@h...> wrote:
>>>
>>> Hi Carl,
>>>
>>> I see you've been scratching away at this, too.   I've also been
>> figuring
>>> out how to use this.  I managed to figure out that the reference 
>>> files
>>> names are hard coded into Eye-One Match so that why we haven't been
>>> able to get it to recognize other Ref files.  So I converted the 21 
>>> step
>>> Ref file to an RGB description rather than Grayscale, and just 
>>> overwrote
>>> the existing i1 RGB 1.5 file (save it first).  This works like a 
>>> charm.
>>>
>>> Just use the ordinary step-21-random.tif file for printing -- in 
>>> fact I
>>> already had linearized print outs from before.   All you need to do 
>>> is
>>> run i1Match and scan the strip.  Voila instant soft-proofs and it'll
>>> work for any kind of grayscale output scheme -- QTR, Roark, Piezo.
>>>
>>> Roy
>>> www.harrington.com
>>>
>>> Here's the new ref file:
>>>
>>> Date: 9/8/2003  Time: 18:47
>>> LGOROWLENGTH 01
>>> BEGIN_DATA_FORMAT
>>> SampleName	RGB_R RGB_G RGB_B
>>> END_DATA_FORMAT
>>> BEGIN_DATA
>>> A1	178.5	178.5	178.5
>>> B1	76.5	76.5	76.5
>>> C1	242.25	242.25	242.25
>>> D1	140.25	140.25	140.25
>>> E1	38.25	38.25	38.25
>>> F1	204	204	204
>>> G1	102	102	102
>>> H1	0	0	0
>>> I1	165.75	165.75	165.75
>>> J1	63.75	63.75	63.75
>>> K1	229.5	229.5	229.5
>>> L1	127.5	127.5	127.5
>>> M1	25.5	25.5	25.5
>>> N1	191.25	191.25	191.25
>>> O1	89.25	89.25	89.25
>>> P1	255	255	255
>>> Q1	153	153	153
>>> R1	51	51	51
>>> S1	216.75	216.75	216.75
>>> T1	114.75	114.75	114.75
>>> U1	12.75	12.75	12.75
>>> END_DATA
>>>
>>>
>>> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield
>> <scho@m...>
>>> wrote:
>>>> I've found a way to strip read the targets.  I used ColorLab to
>> create
>>>> new reference and target files from the original i1 RGB 1.5 
>>>> reference
>>>> file.  I converted the target tif to LAB-L and then gray (gamma
>> 2.2) as
>>>> before for printing. The new reference file is placed in the
>> reference
>>>> files>printer>eye-one> folder in the ProfileMaker Pro folder so it
>> can
>>>> be accessed by MeasureTool.  The new target tif file has borders
>> around
>>>> the patches and it is easily strip read in MeasureTool.  You need to
>>>> check spectral data in the configuration and then pick the new 
>>>> target
>>>> reference file from the chart pop-up list and specify strips with
>> gaps
>>>> before reading the strips.  The data is saved from MeasureTool as a
>>>> text document and the file is placed in the i1Match measurement
>>>> data>printer folder.  Next, open i1Match, select the radio button
>> "load
>>>> the measured chart" and open the file that was read and saved from
>>>> MeasureTool.  i1Match will then create the profile and it did so
>>>> without errors on my first try.  I've added the new target and
>>>> reference files to the Softproof archive on my filesharing site for
>>>> those that want to try making their own softproof icc profiles
>> with the
>>>> eye-one.
>>>>
>>>> Carl
>>>>
>>>> On Tuesday, January 13, 2004, at 03:15  PM, Carl Schofield wrote:
>>>>
>>>>> I recently discovered (stumbled across) a way to create standard 
>>>>> icc
>>>>> profiles that can be used for soft-proofing QTR prints in 
>>>>> Photoshop.
>>>>> I've put a sample soft-proof profile that was created from an icc
>>>>> profile for a QTR sepia curve that I use quite often in an
>> archive on
>>>>> my filesharing site.  Just drop the proof profile (sepia1.psf)
>> in the
>>>>> folder Library>Application Support>Adobe>Color>Proofing and
>> follow the
>>>>> illustrated instructions for using the soft-proof in the read-me
>> file
>>>>> that is also in the archive.  You don't need to be using or have 
>>>>> QTR
>>>>> installed to just see how any RGB or grayscale image you have will
>>>>> actually look if it were printed with QTR and the sepia curve I'm
>>>>> using. The read-me also has instructions for creating the icc
>> profiles
>>>>> if you want to make your own.  This can be applied to any
>> inkset/paper
>>>>> and probably with quad workflows other than QTR as well.  One of 
>>>>> the
>>>>> nice things about using standard icc soft-proof profiles is that 
>>>>> you
>>>>> can work up your image for printing in any mode (full RGB color or
>>>>> grayscale) and get a preview of the printed results as you do RGB 
>>>>> to
>>>>> grayscale conversions, curve adjustments, etc. with the soft-proof
>>>>> turned on.
>>>>>
>>>>> The softproof archive with the profile and tutorial is in the QTR
>>>>> Soft-proof folder at:
>>>>>
>>>>> http://homepage.mac.com/scho/FileSharing2.html
>
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