Re: ColorSync inconsistency in iPhoto
Re: ColorSync inconsistency in iPhoto
- Subject: Re: ColorSync inconsistency in iPhoto
- From: Pete Carter <email@hidden>
- Date: Fri, 11 Feb 2005 09:03:19 +0000
> Pete,
>
> I think what's happening is that iPhoto is normalizing to Generic RGB
> in three situations, two of which call for a conversion:
>
> 1. Assumed source for untagged images. (We've discussed on this list at
> length how intellectually absent this decision is on Apple's part, and
> their unwillingness to demonstrate how they came to their decision to
> use Generic RGB instead of sRGB like the rest of the world; ergo it was
> a political decision, not one based on facts.)
In ColorSync Utility if I set RGB Default to Adobe RGB, it
States clearly and specifically.... use this panel to specify default
profiles for each color space to be used when a document does not contain
embedded profiles.
And then I open an untagged image in Preview and then save, it ignores the
above and still the image remains without embedded profile. Same with
iPhoto. To what extent and which app then does this feature in the CS Util
have any effect? Id love to know.
> 2. Editing images (conversion from embedded source to Generic RGB as
> destination, retagging with Generic RGB).
This is what Im getting in iPhoto. Its dangerous! And no warning too..thats
the best bit.
>
> 3. Outputting images for purchase (books or prints). It may also be
> converting to Generic RGB when printing locally but I haven't confirmed
> this yet. (Conversion is from embedded source to Generic RGB as
> destination, retagging with Generic RGB.)
Its such a shame to have a feature like this that ends up being near useless
Youd think it would be such an easy thing to do incorporating a few more
controls in iPhoto so you could print converting to destination profiles and
being able to choose rendering intent. Even having an expert controls box so
not to frighten some folk.
> At the moment, I don't believe iPhoto 5 is ignoring embedded profiles
> and improperly retagging them with Generic RGB. More testing is needed
> however. If iPhoto converts files without prompting at all, and to
> Generic RGB on top of it, then iPhoto remains a polluted application
> for even prosumer use, let alone professional use. I find no undo
> option, or user intuitive way of getting back to the original files,
> and this amounts to yet another assault on end user data. It's
> effectively data loss.
>
Yep that does seem to be the case.
Thanks for your input Chris,
Regards
Pete
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