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:
- 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.
- 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
He appreciated kind treatment.
all smiles and affection, and made no further reference to Beauty's
desire to show some solid recognition of this magnanimity. Few
refrain from occasionally turning the conversation in the direction
her part to convince him that Lucille was a topper and a corker and
the first moment he had met her: but what he did feel was that she
happy coincidence to him that her birthday.html">birthday should be coming along in
sort.html">sort of a not unjuicy gift for that occasion--something pretty ripe
something would come along to relieve his chronic impecuniosity for
this great occasion.
And, as if in direct answer to prayer, an almost forgotten aunt in
than five hundred dollars across the ocean. The present was so
participates in a miracle. He felt, like Herbert Parker, that the
fellow's faith in human nature. For nearly a week he went about in a
betting Reggie van.html">van.html">van Tuyl that the New York Giants would win the
contrived to double his capital, what it amounted to was simply that
to a thousand dollars for Lucille's birthday present. He gathered in
and dragged him off to a jeweller's on Broadway.
The jeweller, a stout, comfortable man.html">man, leaned on the counter.html">counter and
of blue plush. Archie, leaning on the other side of the counter,
these things; for he had rather a sort of idea that the merchant was
van Tuyl, half asleep as usual, yawned despondently. He had
something and go. Any form of sustained concentration fatigued
fifty dollars."
"Grab it!" murmured Mr. van Tuyl.
The jeweller eyed him approvingly, a man after his own.
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