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Improve the quality of printed iPhoto books
Actually, if the pictures were smaller, a lower DPI would be more noticeable. Consider that if you use 300 dpi for an image that's 4 inches across, and 150 dpi for an image that's 2 inches across, the smaller image would have 1/4 the area but only 1/16 of the number of pixels! In short, you'd be looking more closely at a smaller picture (possibly squinting), but could lean back a bit to see the larger picture. So it makes sense that one would want a larger DPI on smaller pictures -- for visual acuity in the book, and bandwidth constaints for Apple. I agree with the hint, though: 300 dpi is the minimum at which anyone would want to print their pictures.
Improve the quality of printed iPhoto books
The mathematical me won't let that lie... :-) |
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