发明名称 Apparatus and accompanying method for converting a bit mapped monochromatic image to a grey scale image using table look up operations.
摘要 <p>A method is disclosed for converting a relatively high resolution halftone bit-mapped monochromatic document, such as illustratively a halftone separation which exists in a CDPF print file, into a relatively low resolution continuous tone grey scale document which, when the latter is applied to a display screen of a video monitor having appropriate grey scale capability, would provide a readable displayed page, i.e. a "preview", that approximately depicts how the bit-mapped document would appear when printed.</p>
申请公布号 EP0389743(A2) 申请公布日期 1990.10.03
申请号 EP19900100907 申请日期 1990.01.17
申请人 INTERNATIONAL BUSINESS MACHINES CORPORATION 发明人 LEE, JACK CHUNSHENG
分类号 B41J2/52;G06T3/40;G06T5/00;H04N1/40 主分类号 B41J2/52
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