Pixels represented in binary

All you need to know

Pixels

A minute area of illumination on a display screen, one of many from which an image is composed.Each pixel is then given a binary code representing its brightness and colour (or its shade of grey if it is a black and white image).

A vector image of a face, and the instructions used to create the image.


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Metadata

The term metadata is ambiguous, as it is used for two fundamentally different types. Structural metadata, the design and specification of data structures, cannot be about data, because at design time the application contains no data. In this case the correct description would be "data about the containers of data".
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A bitmap images take the form of an array, where the value of each element, called a pixel picture element, correspond to the color of that portion of the image. Each horizontal line in the image is called a scan line.

The letter 'a' might be represented in a 12x14 matrix. The values in the matrix choose the brightness of the pixels (picture elements). Larger values correspond to brighter areas whilst lower values are darker.