IPhoto jpeg import quality

I have noted that when I import a photo, especially dark pictures with lots of rumor, from a jpeg file into the iPhoto library it is displayed differently in iPhoto then if you open the original file with, say Preview: it is much darker.
If I leave the photo untouched in Iphoto and then export it, it remains the same photo as the original. But if modify the photo in iPhoto, say I rotate it and then export it, it will be as it is displayed in iPhoto, even if I open it with Preview.
Does anyone know why this is so? Is iPhoto automatically adjusting pictures as you import them? Is there an option to disable this?
Regards
fabrizio

I don't know of an option in iPhoto that 'automatically adjusts' images, but if it does that it is unacceptable if you can't turn it off.
The new iWeb does exactly that and has messed lots of people's images up by 'enhancing' them on import - there is an option there to disable the 'feature' which IMO should be off by default.
My guess is that you problem might be due to embedding of a ColorSync profile altering the way the image is displayed when exported/imported.
Under Advanced preferences there's an option to embed ColorSync profiles (though it says on import). Try importing with and without that. It may that if selected the original is still unaltered but a copy with the new embeddeed profile is what you get to edit.
AC

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IPhoto jpeg import quality

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