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These resolutions seem low compared to my desktop scanner which gives 1200 dpi or about 472 pix per cm?

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These resolutions seem low compared to my desktop scanner which gives 1200 dpi or about 472 pix per cm?

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Scanner resolution is usually expressed relative to the original’s size, not the final size. Think in terms of the number of pixels needed for the final print. Some scanners quote two different resolutions, optical and interpolated. Interpolation does not increase sampling resolution or detail; it simply generates more pixels from the same amount of information.

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