Image analysis – Image compression or coding – Shape – icon – or feature-based compression
Patent
1997-07-10
2000-01-11
Shalwala, Bipin
Image analysis
Image compression or coding
Shape, icon, or feature-based compression
382239, 382248, 382251, 358433, 348405, G06K 936, G06K 946, G06K 938
Patent
active
060144661
ABSTRACT:
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.
REFERENCES:
Jain et al., "Image Segmentation Using Clustering", Advances in Image Understanding: A Festschrift for Azriel Rosenfeld, IEEE Computer Society Press, 1996, pp. 65-83.
Chellappa et al., "Multiresolution GMRF Models for Image Segmentation", Advances in Image Understanding: A Festschrift for Azriel Rosenfeld, IEEE Computer Society Press, 1996, pp. 13-27.
Matic Roy M.
Xia Xiang-Gen
Duraiswamy V. D.
Hughes Electronics Corporation
Sales M. W.
Shalwala Bipin
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