Re: iPhoto, Photoshop 7 and Profiles
Re: iPhoto, Photoshop 7 and Profiles
- Subject: Re: iPhoto, Photoshop 7 and Profiles
- From: email@hidden
- Date: Mon, 28 Oct 2002 08:57:58 EST
In a message dated 10/28/02 12:44:39 AM, email@hidden writes:
>
I use image capture in OSX 10.2.1 to download images from my Kodak
>
DC280 camera to a folder on my harddrive. The image capture options
>
have "embed Colorsync profile" set to off.
Right, so there is no profile, but the header info is still interpreted by
Photoshop to mean that the file is sRGB.
Then I import those photos
>
into iPhoto 1.1.1.
>
iPhoto is set up to open the images in Photoshop 7.01.
>
When I open the photos in PS7, it claims that an sRGB profile is
>
embedded.
Not exactly an embedded profile, just the header info that implies sRGB for
all digital camera captures.
I make now 3 copies of a photo in iPhoto and do the following:
>
1st: don't modify it
Then. since it is being treated as sRGB, it would be opened raw into sRGB; so
the original numbers are now assumed to be sRGB numbers.
>
2nd: I assign Adobe RGB profile in PS7 and save
If your workingspace is AdobeRGB, then it's the same as being opened raw into
AdobeRGB and the original numbers are now assumed to be AdobeRGB numbers; if
your workingspace is sRGB, the result of the transform will still be a file
whose original numbers are now being viewed as AdobeRGB numbers.
>
3rd: I convert to Adobe RGB in PS7 and save
Convert from where? If your images are opening into sRGB, then converting is
actually changing the numbers, not just their interpertation. Since many
digicams are tuned for sRGB this is often the appropriate route to AdobeRGB,
though for this type of gamut limited file, being in AdobeRGB will offer no
advantages. For cameras tuned to a larger gamut capture and intented to be
opened in AdobeRGB (such as the Olympus E-10 and E-20) then this is the wrong
route, setting your workingspace to AdobeRGB, telling it to not color manage
on opening, then assigning AdobeRGB would be appropriate; or use the handy
plugin Adobe has for Photoshop that ignores the header data, and makes
digital camera files come in as untagged, so you can save a step and simply
assign AdobeRGB on opening. This only matters for cameras where AdobeRGB is
appropriate, however.
C. David Tobie
Design Cooperative
email@hidden
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.