In a message dated 7/19/06 1:56 PM, Mark Rice wrote:
> I think the following exchange explains why many users are unhappy with the
> state of color management, and flee toward solutions like GMG:
>
> "Marco Ugolini email@hidden wrote:
>
>> No, Bill, not according to what I have. I'm looking at the reference
>> file named "ECI2002R CMYK.txt" that came with ProfileMaker 5.0.5b:
>> position 2S16 does carry a C100, M0, Y0, K0 value, and so does the
>> patch in the same position in its corresponding testchart file, named
> "ECI2002R CMYK.tif".
>
>
> I was actually comparing the ECI2002R CMYK.txt file to the measurement file
> that I created after I measured the press run of the ECI2002R target.
>
> After I wrote my original post I noticed that I was reading the .txt file I
> had exported as LAB from Measure Tool. I then compared it to the .txt file I
> saved from Measure Tool which I had used to make my profile. The LAB.txt
> file is the one with
> 2S9 as C100, M0, Y0, K0, and the .txt file has it correct:
>
>> From LAB.txt file:
> 1287 2S9 100.00 0.00 0.00 0.00 13.97 21.29 49.78
> 53.26 -35.94 -49.59
> 1294 2S16 70.00 0.00 0.00 0.00 23.64 31.21 53.03 62.68
> -26.18 -36.95
>> From the .txt file:
> 108 2S9 20.00 100.00 10.00 0.00 0.1302 (more numbers - I
> deleted them for this sample)
> 1287 2S16 100.00 0.00 0.00 0.00 0.0942 (more numbers - I
> deleted them for this sample)
>
> You can see the .txt file matches the values in the .tif file while the
> LAB.txt file does not. Hummm?
Is Bill comparing the two files in Measure Tool using the visual, random or
"as measured" layout? There are 3 ways to view the data here, and each uses
a completely different distribution of letter-number coordinates.
With all due respect, I think that Mark's statement is too sweeping, at
least in this instance. It's my impression that in most cases the bafflement
of users regarding color management is due to a mistaken interpretation of
procedures and workflows, rather than an inherent shortcoming of color
management per se.
--------------
Marco Ugolini
Mill Valley, CA
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