发明名称 |
Object-based video coding of arbitrarily shaped objects using lapped orthogonal transforms (LOTs) defined on rectangular and L-shaped regions |
摘要 |
An object-based image/video coding algorithm that encodes arbitrary shaped objects using LOTs defined on rectangular and L-shaped regions. The regions of support of the blocks in the L-shaped regions are extended to form tapered overlapping regions that meet at the object's exterior and concave corners. The overlapping regions taper to the corners with a slope having a magnitude delta / epsilon , where delta and epsilon are the amounts of overlap between the blocks. This allows the basis and tapered window functions to be defined in the L-shaped region and specifically in the tapered overlapping regions in a manner that maintains the orthogonality of the basis functions while providing a smooth transition at the edges.
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申请公布号 |
US6014466(A) |
申请公布日期 |
2000.01.11 |
申请号 |
US19970891083 |
申请日期 |
1997.07.10 |
申请人 |
HUGHES ELECTRONICS CORPORATION |
发明人 |
XIA, XIANG-GEN;MATIC, ROY M. |
分类号 |
G06T9/00;(IPC1-7):G06K9/36;G06K9/38;G06K9/46 |
主分类号 |
G06T9/00 |
代理机构 |
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代理人 |
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地址 |
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