发明名称 |
Method and device for compressing bit-map data |
摘要 |
The present invention relates to a bit-map compressing method and a bit-map compressing device. The bit-map data compressing method includes a main scanning step for scanning bit-map data in a main scanning direction; a first region separating step for separating a region including black pixels and a region including no black pixels in line unit; a secondary scanning step for scanning in a secondary direction perpendicular to the main scanning direction; a second region separating step for separating a region including black pixels and a region including no black pixels, in column unit; and an encoding step for encoding as an element each region obtained in the first region separating step and the second region separating step. Bit-map can be transferred by effectively performing data compression on simple algorithm, without using special hardware.
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申请公布号 |
US5777749(A) |
申请公布日期 |
1998.07.07 |
申请号 |
US19970802096 |
申请日期 |
1997.02.19 |
申请人 |
FUJITSU LIMITED |
发明人 |
NODA, TSUGIO;SAKAI, KENICHIRO |
分类号 |
H04N1/411;G06T9/00;H03M7/46;H04N1/415;H04N1/419;(IPC1-7):H04N1/415 |
主分类号 |
H04N1/411 |
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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