Editing Image resolution (section)

{{short description|Measure of how fine an image is}}
{{distinguish|Optical resolution}}
{{Redirect|Hi-res|the London-based design firm|Hi-ReS!|the digital audio quality term|High-resolution audio}}
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'''Image resolution''' is the level of detail of an [[image]]. The term applies to digital images, film images, and other types of images. "Higher resolution" means more image detail.
Image resolution can be measured in various ways. Resolution quantifies how close lines can be to each other and still be visibly ''resolved''. Resolution units can be tied to physical sizes (e.g. lines per mm, lines per inch), to the overall size of a picture (lines per picture height, also known simply as lines, TV lines, or TVL), or to angular subtense. Instead of single lines, '''line pairs''' are often used, composed of a dark line and an adjacent light line; for example, a resolution of 10 lines per millimeter means 5 dark lines alternating with 5 light lines, or 5 line pairs per millimeter (5 LP/mm). Photographic lens are most often quoted in line pairs per millimeter.