PIXELS AND RESOLUTION

About it

PIXEL

n digital imaging, a pixel, or pel,[1] (picture element[2]) is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen. The address of a pixel corresponds to its physical coordinates. LCD pixels are manufactured in a two-dimensional grid, and are often represented using dots or squares, but CRTpixels correspond to their timing mechanisms and sweep rates.


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PIXELS by Patrick JEAN (OFFICIAL BY ONEMOREPROD - HD)

RESOLUTION

Image resolution can be measured in various ways. Basically, resolution quantifies how close lines can be to each other and still bevisibly 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 subtenant. Line pairs are often used instead of lines; a line pair comprises a dark line and an adjacent light line. A line is either a dark line or a light line. A resolution 10 lines per millimeter means 5 dark lines alternating with 5 light lines, or 5 line pairs per millimeter (5 LP/mm). Photographic lens and film resolution are most often quoted in line pairs per millimeter.




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