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Images of Edinburgh
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The image library for the collections of Edinburgh Libraries and Museums and Galleries
Images of Edinburgh
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Area A - Z
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Subject A - Z
Digital image
Digital image
Digital image
About the image medium
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Digital image
Notes
Before the arrival of digital technology, photography involved the use of film, subjected to exposure to light and to a variety of chemical procedures. In itself film had superseded the use of photographic paper. A digital image is obtained through the storage of picture elements or 'pixels' in a computer memory. Pixels, or the smallest individual element in an image, send out electrical signals in proportion to the light they receive and are then converted and stored in a grid, which is capable of further manipulation or compression. Digital cameras and scanners are used in the production of digital images but this technology is continually evolving.
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