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In computing terminology, black-and-white is sometimes used to refer to a binary image consisting solely of pure black pixels and pure white ones; what would normally be called a black-and-white image, that is, an image containing shades of gray, is referred to in this context as grayscale. [2]
Images using only shades of grey are called grayscale (typically digital) or black-and-white (typically analog). In physics, monochromatic light refers to electromagnetic radiation that contains a narrow band of wavelengths, which is a distinct concept.
Digital photo of Kearny Generating Station, converted to black and white in Lightroom, with color channels adjusted to mimic the effect of a red filter. 1968 group portrait of a Swedish musical's cast. Black-and-white photography is considered by some to be more subtle and interpretive, and less realistic than color photography.
Box of black-and-white cookies from a New York City bakery. The black-and-white cookie is commonly traced to Glaser's Bake Shop in the Yorkville neighborhood of Manhattan, founded in 1902 by Bavarian immigrants. [note 1] The black-and-white cookie was among the original recipes used by Glaser's Bake Shop. [5]
Similar effects in cinema, and black and white and low-key photography, are also called chiaroscuro. Further specialized uses of the term include chiaroscuro woodcut for colour woodcuts printed with different blocks, each using a different coloured ink; and chiaroscuro for drawings on coloured paper in a dark medium with white highlighting. [2]
The contrast ranges from black at the weakest intensity to white at the strongest. [1] Grayscale images are distinct from one-bit bi-tonal black-and-white images, which, in the context of computer imaging, are images with only two colors: black and white (also called bilevel or binary images). Grayscale images have many shades of gray in between.
Some explanations of Black Friday claim that the holiday references a 19th-century term for the day after Thanksgiving, during which plantation owners could buy slaves at discount prices.
Splitting, also called binary thinking, black-and-white thinking, all-or-nothing thinking, or thinking in extremes, is the failure in a person's thinking to bring together the dichotomy of both perceived positive and negative qualities of something into a cohesive, realistic whole.