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Improve the quality of printed iPhoto books
Authored by: daniel_clift on Jul 21, '05 09:29:39AM
If this is the case then it's going to be about file size - a 150 dpi image has a file one quarter of the size of a 300dpi image - for two reasons.
Apple will probably have in mind a notional figure for the length of time it should take to upload a typical book for printing, as part of improving the iPhoto user experience - the lower resolution would be the compromise for the bigger pages, and one which most users will not be bothered by or even notice.
More important though is the impact on printing times, which will be a big issue for Apple's commercial partners who actually make these books . They are almost certainly being ouput on the new digital type presses i.e. straight to paper without films or plates - kind of like a glorified colour laser printer. The image files for the books will need to be processed through the printer RIP en route, and bigger image files would mean longer RIP times, and therefore slower output per book. With the smaller books there would be less of an impact, hence the resolution could remain higher.

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