pix·ela minute area of illumination on a display screen, one of many from which an image is composed.


Image resolution
is the detail an image holds. The term applies to raster digital images, film images, and other types of images. Higher resolutionmeans more image detail. Image resolution can be measured in various ways.

meg·a·bytea unit of information equal to 2²⁰ bytes or, loosely, one million bytes
meg·a·pix·ela unit of graphic resolution equivalent to one million or (strictly) 1,048,576 (2²⁰) pixels.

"a 3.2-megapixel camera"      

gig·a·bytea unit of information equal to one billion (10⁹) or, strictly, 2³⁰ bytes.

JPEGa format for compressing image files.

"a JPEG image"

• a file in JPEG format.
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