Graphics Programs Reference
In-Depth Information
reason the radio button defaulted to this item is due to the
policy being set to
Convert to Working RGB
.
2.
Simply click
OK
. You may see a progress dialog box that says
Converting Colors
, depending on how fast your machine runs.
What is happening here is the document is being converted from
sRGB to Adobe RGB (1998).
3.
When the document opens, notice that the
Document Profile
indicator shows that the document is in Adobe RGB (1998),
proving that a conversion did take place. All the data in this
document has been changed on-the-fly when the document was
opened.
4.
The image preview should look virtually identical to the
previously open document even though the data was changed
from sRGB to Adobe RGB (1998). This again illustrates
Document Specific Color
.
Dog_in_Bowl.tif
previews
correctly in Adobe RGB (1998) once that document has been
converted to this new color space.
In reality, there is little if any reason to convert this document into Adobe
RGB (1998). sRGB is a smaller gamut color space than Adobe RGB (1998)
so converting on opening the document didn't make the color gamut of
this document any larger. For whatever reason, the original user of the
Dog_in_Bowl.tif
document wanted it in sRGB. So preserving the orig-
inal profile as we did the first time we opened the document makes sense.
If the
Dog_in_Bowl.tif
document is open, close this image and if
asked to save, click
Don't Save
or just hold down the
D
key. Go back
into the
Color Settings
once again. This time set the policy for RGB
documents to
Off
and click
OK
.
1.
Now reopen the
Dog_in_Bowl.tif
document once again. The
Embedded Profile Mismatch
opens yet a third time. The RGB
working space is still set to Adobe RGB (1998) and the
Dog_in_Bowl.tif
document is still not in that color space.
Notice that this time, the radio button defaults to
Discard the
embedded profile (don't color manage)
as seen in Fig. 9-5-5.
Click
OK
to open the document.
If you examine the document's profile indicator at the bottom of the
document window, you will see it now says
Untagged RGB
. The
preview of the image shouldn't look correct either! This is because Pho-
toshop will use the currently selected working space, in this case Adobe
RGB (1998), as a mechanism for previewing documents, which are
untagged. The
Dog_in_Bowl.tif
document is in sRGB. However, since
we discarded the color profile, it opens untagged. Photoshop therefore
uses Adobe RGB (1998) (the color space set in the Color Settings) as the
assumption for previewing this document. Yet, the document is in sRGB,
