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Modern Digital Halftoning
作者: Daniel L.Lau, Gonzalo R.Arce
日期: 2001
ISBN: 0824704568
页数: 446
语言: English
出版社: Marcel Dekker Inc
标签: 科学工程
图书介绍
Shortly after being published, Robert Ulichney’s book, \"Digital Halftoning,\" created a revolution in the digital printing industry. At the time, digital halftoning, the art of converting a continuous-tone image to binary for viewing on binary display devices, was done primarily using amplitude modulated screening in which varying shades of gray were produced by varying the size of black dots arranged along a regular grid. While not introducing a new technique, Ulichney studied frequency modulated halftoning in which varying shades of gray are produced by varying the spacing between randomly placed, same-sized dots and showed that this alternative screening process (introduced in 1973) reproduced images with much higher spatial resolution.
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发表于 2011-1-28 20:20:10