发明名称 |
Image compression apparatus, image expansion apparatus, image forming apparatus, image compression method, image expansion method and storage medium |
摘要 |
An image compression apparatus compresses image data by carrying out a parallel processing for every image pattern made up of a plurality of bits. The apparatus includes a first unit for obtaining a run length of the image data and a repetition number of the run length, a second unit for coding the run length and the repetition number obtained by the first unit, and a third unit for predicting whether or not a code length of a code generated by a word which is to be coded by the second unit exceeds a predetermined threshold value, based on the run length and the repetition number obtained by the first unit. The second unit carries out a pass coding to output the image pattern as it is when the third unit predicts that the code length exceeds the predetermined threshold value.
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申请公布号 |
US7483586(B2) |
申请公布日期 |
2009.01.27 |
申请号 |
US20050135523 |
申请日期 |
2005.05.24 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
SHIRAISHI NAOTO |
分类号 |
G06K9/36;H04N7/26;G06K9/46;G06T9/00;H03M7/30;H03M7/46;H04N1/413;H04N1/417;H04N1/419 |
主分类号 |
G06K9/36 |
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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