Orion Vianna wrote:
If you want to make a good 8x10 print under the above standards, it will
be best to have a 300ppi image with a size of 2400 by 3000 (8x300 by
10x300), a 7.2Mpixel scan. So now you know exactly the why of the quest
for higher Mpixel rating from scanners (and digital cameras), even when
interpolation may acceptably invent pixels where there are none. "
BTW other people are saying the same thing, here is another link.
http://www.photoshopessentials.com/essentials/image-quality/
Ok so maybe you already knew that.
I may be totally missing something but a 12000x12000 image will give me
exactly 40x40 inches of quality print.
40x40 is much smaller then whats on the side of buildings in the city...
I love to know how they deal with such huge file sizes...
Thats why I wrote 12k x 12k image is not that big.
To my knowledge things like outdoor advertising of large scale are done
at a much lower ppi. For example, billboards can be on the order of tens
of ppi. Often developed at a smaller scale (say 1/12) and then blown up
in final production.
It's all about what you need of course. Viewing distance is an important
factor. Remember the larger the image, the farther back you will be in
order to "take it all in"
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