Encyclopedia > Contrast

  Article Content

Contrast

In visual perception of real life, printed paper, a computer display, etc. contrast between different parts of an image, especially between objects (including characters) and the background enables one to see objects, read text, etc.

It depends on the color of the objects and background, paper and ink, etc. themselves, but also on the lighting.

For the computer display we can additionally distinguish between the properties of e.g. the picture file, and the properties of the computer display and its settings itself, such as how bright it is. For some screens the angle at which one looks at it is also an important factor.

In telecommunication, the term contrast has the following meanings:

  1. In display systems, the relation between (a) the intensity of color, brightness, or shading of an area occupied by a display element, display group, or display image on the display surface of a display device[?] and (b) the intensity of an area not occupied by a display elements, a display group, or a display image. Deprecated synonym: brightness ratio.
  2. In optical character recognition, the difference between color or shading of the printed material on a document and the background on which it is printed.

Source: from Federal Standard 1037C



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Ocean Beach, New York

... average household size is 2.26 and the average family size is 2.91. In the village the population is spread out with 21.7% under the age of 18, 5.1% from 18 to 24, 32.6% ...

 
 
 
This page was created in 43.3 ms