contrast (redirected from water-soluble contrast agents)

contrast

The white level of a display screen. The contrast adjusts how bright the white is. See brightness and contrast ratio.

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contrast

1. (in painting) the effect of the juxtaposition of different colours, tones, etc.

2. 

a. (of a photographic emulsion) the degree of density measured against exposure used

b. the extent to which adjacent areas of an optical image, esp on a television screen or in a photographic negative or print, differ in brightness

3. Psychol the phenomenon that when two different but related stimuli are presented close together in space and/or time they are perceived as being more different than they really are

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contrast [′kän‚trast]

(communications)

The degree of difference in tone between the lightest and darkest areas in a television or facsimile picture.

(computer science)

In optical character recognition, the difference in color, reflectance, or shading between two areas of a surface, for example,a character and its background.