NDLI: An adaptive low-complexity global motion estimation algorithm

Content Provider	IEEE Xplore Digital Library
Author	Haque, M.N. Biswas, M. Pickering, M.R. Frater, M.R.
Copyright Year	2010
Description	Author affiliation: School of Engineering and Information Technology, The University of New South Wales at the Australian Defence Force Academy, Canberra, Australia (Haque, M.N.; Biswas, M.; Pickering, M.R.; Frater, M.R.)
Abstract	One important recent application of image registration has been in the estimation of global motion parameters for object-based video coding. A limitation of current global motion estimation approaches is the additional complexity of the gradient-descent optimization that is typically required to calculate the optimal set of global motion parameters. In this paper we propose a new low-complexity algorithm for global motion estimation. The complexity of the proposed algorithm is reduced by performing the majority of the operations in the gradient-descent optimization using logic operations rather than full-precision arithmetic operations. This use of logic operations means that the algorithm can be implemented much more easily in hardware platforms such as field programmable gate arrays (FPGAs). Experimental results show that the execution time for software implementations of the new algorithm is reduced by a factor of almost four when compared to existing fast implementations without any significant loss in registration accuracy.
Starting Page	598
Ending Page	601
File Size	97506
Page Count	4
File Format	PDF
ISBN	9781424471348
e-ISBN	9781424471355
DOI	10.1109/PCS.2010.5702574
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-08
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion estimation Software algorithms gradient-descent optimization image registration Signal processing algorithms Complexity theory video coding Mathematical model global motion estimation Optimization Pixel
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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