Object-based video coding of arbitrarily shaped objects using la

Image analysis – Image compression or coding – Shape – icon – or feature-based compression

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Details

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.

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