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Dodgson, Charles Lutwidge [pseud. Lewis Carroll]

Morton N. Cohen.

in Oxford Dictionary of National Biography

September 2004; p ublished online September 2004 .

Reference Entry. Subjects: Photography and Photographs; Mathematics; Literature. 5765 words.

Dodgson, Charles Lutwidge [pseud. Lewis Carroll] (1832–1898), author, mathematician, and photographer, was born at Daresbury parsonage, Cheshire, on 27 January 1832, the eldest son and...

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posterization

Overview page. Subjects: Computing — Photography and Photographs.

The redefining of an image so that the number of gray levels or colors is reduced. This enhances the boundaries between different parts of the image.

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