发明名称 |
Method and apparatus for printing an enhanced image. |
摘要 |
<p>A method and apparatus for enhancing the quality of images printed by dot printers or dot displays are disclosed. Image irregularities caused by quantization are smoothed by using a set of rules to transform an initial pattern (Fig. 2A) into an enhanced pattern (Figs. 2E, 2F) for printing. The initial pattern (Fig. 2A) may consist of a matrix of bits representing an image having X dots per inch along an intended direction of printing. An intermediate pattern (Fig. 2B) is formed by replicating columns of bits from the initial pattern (Fig. 2A). Image enhancement rules (Fig. 2C) are applied to the intermediate pattern (Fig. 2B) to invert (Fig. 2D) one or more bits in the intermediate pattern (Fig. 2B) to create an enhanced pattern (Figs. 2E, 2F). The enhanced pattern (Figs. 2E, 2F) is printed (Fig. 2F) at n*X dots per inch along the direction of printing where n > 1. <IMAGE></p> |
申请公布号 |
EP0622756(A2) |
申请公布日期 |
1994.11.02 |
申请号 |
EP19940302984 |
申请日期 |
1994.04.26 |
申请人 |
HEWLETT-PACKARD COMPANY |
发明人 |
MCDONOUGH, TIMOTHY M.;SCANDALIS, ANEESA R.;BLUME, J. ERIK |
分类号 |
B41J2/485;G06K15/00;G06T5/20;G06T5/30;G09G5/391;H04N1/387;(IPC1-7):G06K15/00 |
主分类号 |
B41J2/485 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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