Epson ES-300C Manuale supplementare - Pagina 8

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200

600 dpi/133 line screen

You'll also notice that if you scan a color image at

600 dpi, the printed result is not much different

from what it is if you scan the same image at 200

dpi, because all printers and printing presses

reproduce the image as a series of dots and have

their own maximum resolution.

Here are two images, one scanned at 200 dpi, one

at 600 dpi, output on the same device. Can you tell

the difference?

An easy way to determine the best resolution for

your intended output is to find out the lines per

inch (lpi) capability of your printer and multiply

it by 1.5. For example, a typical magazine printing

press prints at 133 lines per inch. To tailor your

scanned image for the best possible results

on this press, you multiply the lines per inch

(133) by 1.5:

133 x 1.5 = 199.5

In this example, the resulting number (200) is the

optimum resolution for the scan. (If you regularly

use a service bureau to print your scanned materials,

you can also ask the printer for the lpi of his

particular printing press and to suggest resolutions.)