Optimization of quadtree segmentation and hybrid two-dimensional and three-dimensional motion estimation in a rate-distortion framework

Tzovaras, D; Vachtsevanos, S; Strintzis, MG

dc.contributor.author	Tzovaras, D	en
dc.contributor.author	Vachtsevanos, S	en
dc.contributor.author	Strintzis, MG	en
dc.date.accessioned	2014-03-01T01:46:05Z
dc.date.available	2014-03-01T01:46:05Z
dc.date.issued	1997	en
dc.identifier.issn	07338716	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24843
dc.subject	Hybrid 2-D and 3-D motion estimation	en
dc.subject	Quadtree segmentation	en
dc.subject	Rate-distortion theory	en
dc.subject	Very low bit-rate coding	en
dc.subject.other	Image quality	en
dc.subject.other	Image reconstruction	en
dc.subject.other	Image segmentation	en
dc.subject.other	Optimization	en
dc.subject.other	Parameter estimation	en
dc.subject.other	Three dimensional	en
dc.subject.other	Motion estimation method	en
dc.subject.other	Quadtree segmentation	en
dc.subject.other	Rate distortion theory	en
dc.subject.other	Wavelet packet image coding	en
dc.subject.other	Image coding	en
dc.title	Optimization of quadtree segmentation and hybrid two-dimensional and three-dimensional motion estimation in a rate-distortion framework	en
heal.type	journalArticle	en
heal.identifier.primary	10.1109/49.650046	en
heal.identifier.secondary	http://dx.doi.org/10.1109/49.650046	en
heal.publicationDate	1997	en
heal.abstract	A rate-distortion framework is used to define a very low bit-rate coding scheme based on quadtree segmentation and optimized selection of motion estimators. This technique achieves maximum reconstructed image quality under the constraint of a target bit rate for the coding of the vector field and segmentation information. First, a complete scheme is proposed for hybrid two-dimensional (2-D) and three-dimensional (3-D) motion estimation and compensation. The quadtree object segmentation is optimized for hybrid motion estimation in the rate-distortion sense. This scheme adapts to the depth of the quadtree and the technique used for motion estimation for each leaf of the tree. A more sophisticated technique, adapted to the requirements of a very low bit-rate coder, is also proposed which also considers the transmission of the prediction error corresponding to the particular choice of the motion estimator. Based on these coding schemes, two versions of a very low bit-rate image sequence coder are developed. Experimental results illustrating the performance of the proposed techniques in very low bit-rate image sequence coding application areas are presented and evaluated.	en
heal.journalName	IEEE Journal on Selected Areas in Communications	en
dc.identifier.doi	10.1109/49.650046	en
dc.identifier.volume	15	en
dc.identifier.issue	9	en
dc.identifier.spage	1726	en
dc.identifier.epage	1738	en