Re: color profile embedding (not conversion) utility?

On 29 Oct 2005 01:12:02 -0700, "blumesan" <blumesan@xxxxxxxxxxx>
wrote:

>I am always amazed ('though perhaps I shouldn't be) that the longer
>these threads get the further they stray from the original subject.

Actually, that's the rule... ;o)

Sometimes diversions can be useful when one learns something new
unexpectedly and at other times frustrating when the subject keeps
getting obscured.

>The OP wanted to know how to assign (or embed) a profile to his image
>file before importing it into his editing software. I am assuming the
>following: that the image file originated from a scanner (this is a
>scanner group), and that the profile he wanted to attach was the
>scanner output profile. Once this were done the image file could be
>imported into the editing software and converted to any working space
>of choice.

That is correct. However, the diversion occurred not about the color
space profile (scanner output) but about the scanner profile itself.
That is to say, the profile which is not attached but *applied* to the
raw data with the intention of correcting for any inherent scanner
bias.

While the former (color space) profile may be useful it can always be
attached afterwards, however, the latter (scanner) profile is of very
limited (if any?) use because the image will have to be edited.
Indeed, a scanner profile can often cause damage which has to be
"undone" in editing afterwards.

>I am dealing with a similar if not identical problem. I can profile my
>scanner using an appropriate target. I can get the scanner to output a
>raw untagged file.

The important thing to note is that there are two totally different
profiles here: the scanner profile and the color space profile. They
have nothing to do with each other.

>Fortunately in Photoshop I can import the untagged
>file, assign the custom scanner profile and then convert to the working
>color space of my choosing.

Exactly, which is why attaching a color space profile when scanning is
not that important. One can always do it afterwards.

>It would however be more efficient if the
>scanner profile were embedded in the image file. If you are trying to
>implement color management it's not a good idea to have untagged files
>floating around. So if one could get the scanner software to embed the
>profile when writing the image data to file, this would solve my
>problem and that of the OP.

It's just a matter of convenience but the key thing is, even if that
is not done at scan time it can always be done afterwards.

Don.
.

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