Invention Grant
- Patent Title: LOSSLESS IMAGE COMPRESSION WITH TREE CODING
- Patent Title (中): 与树编码的无损耗图像压缩
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Application No.: EP98921985.2Application Date: 1998-05-07
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Publication No.: EP0981896B1Publication Date: 2003-04-02
- Inventor: THORELL, Per , EINARSSON, Torbjörn , PASSAGGIO, Filippo
- Applicant: TELEFONAKTIEBOLAGET LM ERICSSON
- Applicant Address: 126 25 Stockholm SE
- Assignee: TELEFONAKTIEBOLAGET LM ERICSSON
- Current Assignee: TELEFONAKTIEBOLAGET LM ERICSSON
- Current Assignee Address: 126 25 Stockholm SE
- Agency: Sandström, Staffan Sven
- Priority: SE9701768 19970513
- International Announcement: WO98052346 19981119
- Main IPC: H04N1/415
- IPC: H04N1/415 ; H04N1/41 ; H04N7/26 ; G06T9/40
Abstract:
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.
Public/Granted literature
- EP0981896A1 LOSSLESS IMAGE COMPRESSION WITH TREE CODING Public/Granted day:2000-03-01
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