contrast


Also found in: Dictionary, Thesaurus, Medical, Legal, Acronyms, Idioms, Wikipedia.

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

Contrast

A juxtaposition of dissimilar elements to show the differences of form or color, or to set in opposition in order to emphasize the differences.

Contrast

 

in psychology, the subjective exaggeration of the differences between perceived objects or between certain sectors of the visual field during their spatial (simultaneous contrast) or temporal (successive contrast) contiguity. Thus, when the color black is placed next to white it seems even blacker. Contrast may also be manifested in color change. For example, a gray square on a red background seems greenish blue; on a blue background it looks orange. The sharpest contrast of two colors is expressed at the boundary of the two areas (boundary contrast). The phenomenon of assimilation is the opposite of contrast. Contrast is widely used in various forms of art and literature.

REFERENCES

Vudvorts, R. Eksperimental’naia psikhologiia. Moscow, 1950.
Teplov, B. M. “Vzaimodeistvie odnovremennykh svetovykh oschchushchenii.” In Zritel’nye oshchushcheniia i vospriiatiia. Moscow-Leningrad, 1935.

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.

contrast

The white level of a display screen. The contrast adjusts how bright the white is. See brightness and contrast ratio.
References in periodicals archive ?
Because of the severity and pervasiveness of the Java deserialization vulnerability, Contrast Security has created a separate, dedicated, RASP Protection Module free for anyone to use.
The Contrast Media Manufacturing Enterprises in China are Yangtze River Pharmaceutical Group, BEILU Pharmaceutical Co.
Risk factors exist that predispose patients to contrast reactions.
The lesion was a subtle lesion, difficult to identify on both examinations, but it is my opinion that it is seen as easily using the single post-triphasic contrast injection technique (Fig.
Imaging using oral contrast is the most prevalent method, but it's often poorly tolerated, delays treatment, and may be responsible for the possible underuse of scans in patients with suspected appendicitis, the investigators said.
Further, the two partners have co-developed Sonazoid, a contrast medium for ultrasonic diagnosis that received approval in May 2004.
The "intervention" involved more than illumination, as the team looked to improve the contrast in place settings.
Key words: behavioral contrast, dynamic changes, session length, habituation Behavioral contrast refers to an inverse relationship between the rate of reinforcement in one component of a multiple schedule and the rate of responding in the other component.
If the contrast material remains in the patient long enough, the metal atoms may break free.
The two sections of her study, "Figures of Virgil and Their Place in Early Modern Editions" and "Jonson, Shakespeare, and the Figures of Virgil," not only inform readers about the commentaries and illustrations of many Virgilian texts but also contrast the medieval, more "Catholic" associations of Virgil as prophet, benevolent magician, and order-bringer in Jonson's works with a clearly defined "Protestant turn" illustrated by Shakespeare's The Tempest.
Hence the design is contemporaneous with MJP's extension to St John's, Oxford (AR October 1994), to which it offers an instruct:re contrast St John's continues the typical Oxbridge courtyard form and draws obvious inspiration flora John Soane.