This topic can fill a book, and I am sure it has. Quick summary: printing
really uses ppi and has nothing to do with the image's dpi per se. Having
said that, generally for good print quality, your image should have at
least 200 dpi and I use 300 dpi myself as minimum. So for example, if your
final image is 4"x6", then you should scan to have at least 1200x1800
pixels to have >= 300 dpi.
At 05:13 PM 7/30/2004, Brian Swale wrote:
>Hi all,
>
>I have a question for those of us who have been involved with paper printing;
>maybe other printing knowledge applies as well.
>
>I am in the process of writing a book, and I hope it will contain many photos.
>
>The publisher has stipulated B&W only due to the cost of printing colour.
>
>B&W costs no more to print than the equivalent area of text, so the extra
>cost of B&W images can be disregarded, except that it brings in more area
>of paper.
>
>Which is good, as I hope to have between 1 and 2 images per opening or
>page, over somewhere (depending on page format/size) from 100 to 200
>pages.
>
>I am now engaging him in meaningful dialogue; I think I have convinced him
>there's more to me that a pretty face (HA! We've never met - all our meetings
>have been over the phone and by e-mail). I have been talking to him about
>image quality and that I want to use my skills to ensure that these images
>are sharp and the contrast and general level of brightness are a big
>improvement on some books I've seen recently
>
>He just told me about one aspect of the images he needs, as follows:
> "no less than 300 dpi"
>
>My question is, how do I relate this to pixels, when scanning.
>
>Does one "d" as in "dpi" = 1 pixel?
>
>If not, what does it actually equate to?
>
>Sincerely,
>
// richard (This email is for mailing lists. To reach me directly, please
use richard@xxxxxxxxxxxxxx)
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