This time, before we perturb the input image, we take the value given by the threshold matrix and divide it by , where is the number of levels for each colour component. As a result, each pixel is perturbed just enough to cover the minimal distance between two colours in the palette. Since the entire palette is evenly distributed across colour space, we only need to modify the range of perturbation along each axis. The dithering equation then becomes:
尖东曾经象征香港夜经济的野心：高消费、强仪式、重面子、重场面。上世纪八九十年代，随着香港经济高速增长和消费模式的转变，日式夜总会成为夜经济最重要的形态之一。尖东一带大规模夜总会聚集，装潢奢华、等级分明、消费高昂，名流、富豪、商界人物频繁出入。夜总会在很长时间里承担着一种特殊的城市功能：它是商业社会的“非正式中枢”。
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