发明名称 |
Lossless image compression with tree coding |
摘要 |
In a method and a device for coding binary matrices, in particular sparse binary matrices, a matrix is gradually partitioned into sub-matrices During the gradual partitioning the number of binary ones are counted for each resulting sub-matrix. If a resulting sub-matrix does not consist of mixed symbols no further partitioning of that sub-matrix is required. The counted number of binary ones for each sub-matrix is then coded and transmitted. The method provides an efficient coding particularly for sparse binary matrices such as bi-level images or bit maps.
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申请公布号 |
US6373988(B1) |
申请公布日期 |
2002.04.16 |
申请号 |
US19990434493 |
申请日期 |
1999.11.05 |
申请人 |
TELEFONAKTIEBOLAGET LM ERICSSON |
发明人 |
THORELL PER;EINARSSON TORBJOERN;PASSAGGIO FILIPPO |
分类号 |
H04N7/26;G06T9/40;H03M7/40;H04N1/41;H04N1/413;(IPC1-7):G06K9/36 |
主分类号 |
H04N7/26 |
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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