Color Management Policies
For users of PSCS versions 8.0 and 9.0, Color Management can be confusing.
In the interests of getting a better understanding of what actually goes on in PS Color Management, we look closely at the "Edit->Color Settings" dialog and ask ourselves the question, "How would I get into a situation where this choice becomes important?", or, in short, "How did I get here?".
Note the three points in the Color Settings Dialog that we have marked as "A", "B", and "C". These three points and the specific configuraion that we have set up as an example, will cover the majority of Color Management situations that can be confusing.
Paragraphs "A", "B", and "C" will describe the circumstances in which the Color Management policies apply.
Please note that this configuration is not a recommendation - it is a reasonable configuration that was put together just for this exercise.
A - Color Management Policies (RGB)
"Working Spaces, RGB" shows your choice of RGB working space.
Any circumstance that raises the issue of how to deal with an image having a different working space (different than sRGB) will bring you to this point.
Examples are:
(1) Opening an image that has an embedded color profile other than sRGB.
(2) Opening an image that has no embedded color profile.
Due to the fact that our chosen policy is to "Preserve Embedded Profiles, case A(1) is resolved by immediately opening the document using its embedded profile.
Due to the fact that the checkbox, "Missing Profiles: |X| Ask When Opening", is checked, case A(2) is resolved by prompting the user to choose beteween 1) open the file without color management, or 2) assign the current RGB working space, or 3) assign an RGB profile from the "pick-list".
B - Color Management Policies (CMYK)
"Working Spaces, CMYK" shows your choice of CMYK working space.
Any circumstance that raises the issue of how to deal with an image having a different working space (different than U.S. Web Coated) will bring you to this point.
Examples are:
(1) Opening an image that has a CMYK embedded color profile other than "U.S. Web Coated".
(2) Opening an image that has no embedded color profile.
Due to the fact that our chosen policy is to "Convert to Working CMYK Working Profile, case B(1) is resolved by immediately opening the document using the CMYK Working Profile (U.S. Web Coated).
Due to the fact that the checkbox, "Missing Profiles: |X| Ask When Opening", is checked, case B(2) is resolved by prompting the user to choose beteween 1) open the file without color management, or 2) assign the current RGB working space, or 3) assign a profile from the "pick-list".
Note that all three options are confined to RGB profiles. So, this is not the place to try to assign a CMYK profile. That should normally be done after working with an image in RGB and then doing the conversion with "Edit->Convert to Profile".
[You may have noticed that the circumstances for getting to either point A or B are very similar.]
C - The checkbox, "Missing Profiles |X| Ask When Opening"
In "A" and "B" above we have already made it quite clear that when the "Missing Profiles" checkbox is checked, it allows the user to correct for the missing profile by assigning an RGB profile, only.
Upon examining the list of profiles in the "pick-list", you will find all the expected RGB profiles, including Epson devices that operate in RGB.
Unfortunately, if the file being opened does not have an embedded profile, there is no way at this point to "assign" or "convert to" a CMYK profile. If that situation arises, it is best to open the image with an assigned RGB profile, do your editing and then convert to CMYK, as was indicated in paragraph "B" above.
Any corrections or suggestion for this tutorial are welcome!
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