NDLI: An efficient low-bit rate adaptive mesh-based motion compensation technique

Content Provider	IEEE Xplore Digital Library
Author	Mahmoud, H.A. Bayoumi, M.
Copyright Year	2000
Description	Author affiliation: Center for Adv. Comput. Studies, Louisiana Univ., Lafayette, LA, USA (Mahmoud, H.A.)
Abstract	This paper proposes a two-stage global motion estimation method using a novel quadtree block-based motion estimation technique and an active mesh model. In the first stage, motion parameters are estimated by fitting block-based motion vectors computed using a new efficient quadtree technique, that divides a frame into equilateral triangle blocks using the quad-tree structure. Arbitrary partition shapes are achieved by allowing 4-to-1, 3-to-1 and 2-1 merge/combine of sibling blocks having the same motion vector. In the second stage, the mesh is constructed using an adaptive triangulation procedure that places more triangles over areas with high motion content; these areas are estimated during the first stage. Finally the motion compensation is achieved by using a novel algorithm that is carried by both the encoder and the decoder to determine the optimal triangulation of the resultant partitions followed by affine mapping at the encoder. Computer simulation results show that the proposed method gives better performance that the conventional ones in terms of the peak signal-to-noise ratio (PSNR) and the compression ratio (CR).
Starting Page	491
Ending Page	494
File Size	461857
Page Count	4
File Format	PDF
ISBN	0780365429
DOI	10.1109/ICECS.2000.911586
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-12-17
Publisher Place	Lebanon
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion compensation Motion estimation Partitioning algorithms Shape PSNR Bit rate Parameter estimation Decoding Computer simulation Signal to noise ratio
Content Type	Text
Resource Type	Article

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