Term:pixel

pixel is a single point of light or color in an image or on a digital display device, and the smallest point that can be individually set to a specific color or brightness.

Pixel is actually short for “picture element”. In digital display technology – whether that’s on screen or digitally printed on paper – anything displayed is comprised of nothing more than dots – the pixels – that are individually set to specific colors.

While most commonly thought of with respect to photographs, everything that is displayed digitally is simply a collection of pixels.

A cyan (light blue) upper case letter A
A cyan (light blue) upper case letter A

The letter A above is represented in a 10-pixel-wide x 18-pixel-high grid, containing a total of 180 pixels.

A common video screen might contain 1024×768 or 786,432 pixels. A 1080p HD video is actually 1920×1080 and thus 2,073,600 pixels – often referred to as 2 mega-pixels.

Digital camera resolution is also spoken of in mega-pixels. The term resolution is used because the more pixels that can be used to capture or encode the same physical area, the more clarity the resulting image will have to the human eye when rendered.

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