Nidelva river through Trondheim Norway

Nidelva river through Trondheim Norway
by Saaru Lindestokke                

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Dots per inch, where a dot is the smallest imaging element in an output medium (droplet of ink, for example, or subpixel in an LCD screen).

See How do I generate high quality prints with an ink jet printer? an excellent explanation of how DPI and PPI relate.

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