发明名称 |
Page printer resolution converting method, and variable-length reversible compression process |
摘要 |
A page printer printing document data includes a first rasterizing part for rasterizing the document data with a first resolution and a data compression part for compressing each of blocks which form first rasterized data from the first rasterizing part to produce a compression code, and for storing the compression code in a compression memory. The page printer further includes a data decompression part for decompressing the compression code stored in the compression memory, and for transmitting decompressed data to a printer engine having the first resolution. A second rasterizing part rasterizes the document data again with a second resolution less than the first resolution when the compression code exceeds a given size. A resolution converting part in the page printer converts second rasterized data from the second rasterizing part to conversion data with the first resolution, and transmits the conversion data to the printer engine having the first resolution.
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申请公布号 |
US5704020(A) |
申请公布日期 |
1997.12.30 |
申请号 |
US19960586477 |
申请日期 |
1996.01.11 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
HANYU, YOSHIAKI;SHIMOMAE, MUTSUO |
分类号 |
G06K15/02;(IPC1-7):G06K15/00 |
主分类号 |
G06K15/02 |
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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