发明授权
- 专利标题： Method of processing data by performing a predetermined operation between a current and preceding raster and compressing the resultant data
- 专利标题（中）： 通过执行当前和前一光栅之间的预定操作并压缩所得数据来处理数据的方法
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申请号： US996787申请日： 1992-12-23
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公开(公告)号： US6088513A公开(公告)日： 2000-07-11
- 发明人: Yoshihiro Nakagawa , Masao Sasaki
- 申请人： Yoshihiro Nakagawa , Masao Sasaki
- 专利权人： Canon Kk
- 当前专利权人： Canon Kk
- 优先权： JPX3-346045 19911227
- 主分类号： B41J2/01
- IPC分类号： B41J2/01 ; B41J5/30 ; B41J29/38 ; G06F3/12 ; G06K15/00 ; G06T9/00 ; H04N1/23 ; H04N1/417 ; G06F15/20
摘要：
At a data output apparatus side, raster image information, which is obtained by means of performing an exclusive OR operation between raster image information on the preceding line and raster image information on the current line, is compression-processed in a raster direction and then transmitted to a data processing apparatus. In the data processing apparatus, the received image information is expansion-processed, an exclusive OR operation between image information after the expansion and image information on the preceding line is carried out, and a processing for recording and the like is performed taking the thus obtained information as the raster image information on the current line. Thus it is possible to provide a higher compression rate of the image information with a simple processing and to improve a processing speed.
公开/授权文献
- US5978904A Data processor 公开/授权日：1999-11-02