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| Understanding Color/Digital imaging systems and characteristics | Index | Home |
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Resolution and lines per inch |
Each peripheral (printer, scanner, display) that inputs or outputs images has a specific resolution. |
Professional printers and scanners have the highest resolutions, generally expressed as dpi (dots per inch) or ppi (pixels per inch), according to how many dots (or pixels) fit into one linear inch. |
The resolution of a computer monitor is about 72 dpi, that of a printer is from 150 to 1440 dpi (for the high-resolution models), while that of a scanner is 300 dpi and higher. |
The term lines per inch (lpi) is used in printing as an expression of the number of lines drawn through a single inch. Newspapers have a resolution of 60 lpi and magazines of 133-175 lpi. High-quality printed material may exceed 200 lpi. |
20 dpi resolution |
72 dpi resolution |
160 dpi resolution |
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