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Check (also checker, Brit: chequer, or dicing) is a pattern of modified stripes consisting of crossed horizontal and vertical lines which form squares.The pattern typically contains two colours where a single checker (that is a single square within the check pattern) is surrounded on all four sides by a checker of a different colour.
The gelatin silver process is the most commonly used chemical process in black-and-white photography, and is the fundamental chemical process for modern analog color photography. As such, films and printing papers available for analog photography rarely rely on any other chemical process to record an image.
As a pattern (more than one stripe together), stripes are commonly seen in nature, food, emblems, clothing, and elsewhere. Two-toned stripes inherently draw one's attention, and as such are used to signal hazards. They are used in road signs, barricade tape, and thresholds. In nature, as with the zebra, stripes may have developed through ...
McCollough effect. The McCollough effect is a phenomenon of human visual perception in which colorless gratings appear colored contingent on the orientation of the gratings. It is an aftereffect requiring a period of induction to produce it. For example, if someone alternately looks at a red horizontal grating and a green vertical grating for a ...
Movement in Squares, by Bridget Riley 1961. Op art, short for optical art, is a style of visual art that uses optical illusions. [1] Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.
The bold stripes of the zebra have been claimed to be disruptive camouflage, [124] background-blending and countershading. [ 125 ] [ e ] After many years in which the purpose of the coloration was disputed, [ 126 ] an experimental study by Tim Caro suggested in 2012 that the pattern reduces the attractiveness of stationary models to biting ...
Advertisement for Ansco Cyko photographic paper, 1922. Photographic paper is a paper coated with a light-sensitive chemical, used for making photographic prints.When photographic paper is exposed to light, it captures a latent image that is then developed to form a visible image; with most papers the image density from exposure can be sufficient to not require further development, aside from ...
Stepping feet illusion. The stepping feet illusion is a motion perception phenomenon involving two "buses," one blue and one yellow, moving horizontally across a "street" consisting of black and white stripes. Although both of the buses move at a constant speed, their perceived speed varies dramatically. [1][2][3]
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