发明授权
US06804402B2 Method and apparatus for hierarchically encoding and decoding an image
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用于对图像进行分层编码和解码的方法和装置
- 专利标题: Method and apparatus for hierarchically encoding and decoding an image
- 专利标题(中): 用于对图像进行分层编码和解码的方法和装置
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申请号: US09272364申请日: 1999-03-19
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公开(公告)号: US06804402B2公开(公告)日: 2004-10-12
- 发明人: James Philip Andrew
- 申请人: James Philip Andrew
- 优先权: AUPP2482 19980320
- 主分类号: G06K936
- IPC分类号: G06K936
摘要:
The method of encoding divides the image into a number of blocks, which are then transformed (200), in accordance with a linear transform, into blocks of transform coefficients. The transform coefficients are rearranged (202) into a set of groups, wherein subsets of the groups of coefficients are capable of being inversed transformed to reproduce the image or a resolution thereof. The groups (203) are then encoded in turn. In the method of decoding, a user first selects a resolution mode and the method decodes (300) a predetermined number of groups in response to said resolution mode. The method then rearranges (301) the decoded groups to form blocks of transform coefficients, wherein the arrangement is determined in response to the resolution mode. The method then inverse transforms said rearrangement (303), if necessary, wherein the inverse transform is dependent on the resolution mode and combines the blocks of pixels to reconstitute the image or a resolution thereof.
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