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dithering 音标拼音: [d'ɪðɚɪŋ] 抖动 抖动 dithering n 1: the process of representing intermediate colors by patterns of tiny colored dots that simulate the desired color such as {graphics} and {audio} to reduce or remove the correlation between noise and signal. Dithering is used in {computer graphics} to create additional colors and shades from an existing {palette} by interspersing {pixels} of different colours. On a {monochrome} display, areas of grey are created by varying the proportion of black and white pixels. In colour displays and printers, colours and textures are created by varying the proportions of existing colours. The different colours can either be distributed randomly or regularly. The higher the {resolution} of the display, the smoother the dithered colour will appear to the eye. Dithering doesn't reduce resolution. There are three types: regular dithering which uses a very regular predefined pattern; random dither where the pattern is a random noise; and pseudo random dither which uses a very large, very regular, predefined pattern. Dithering is used to create patterns for use as backgrounds, fills and shading, as well as for creating {halftones} for printing. When used for printing is it very sensitive to paper properties. Dithering can be combined with {rasterising}. It is not related to {anti-aliasing}. (2003-07-20)
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