NDLI: Interframe coding using deformable triangles of variable size

Content Provider	IEEE Xplore Digital Library
Author	Yazdi, M. Zaccarin, A.
Copyright Year	1997
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Laval Univ., Que., Canada (Yazdi, M.)
Abstract	Motion compensation using deformable triangle patches has been successfully used for low bit rate coding of videophone sequences. They were also shown to be particularly efficient for interframe coding of MRI sequences, for which the difference between image slices can be well modeled by affine deformations. Regular triangular meshes were used in previous work. In this paper we present a quadtree decomposition algorithm to generate a triangle mesh for which smaller triangles are used in image areas where the motion or deformation is more complex. The decomposition algorithm uses a strategy based on rate-distortion theory. The cost of using a new grid point, i.e., the bit rate, is compared to the reduction in prediction error energy that would result if that grid point is used. Grid points are recursively added to areas where the reduction in prediction error is more significant. Results show that using variable size triangular patches increases the SNR of the motion-compensated image by 0.5 to 0.75 dB while reducing the number of grid points by 15 to 25% when compared to a regular triangular mesh.
Starting Page	456
Ending Page	459
File Size	366781
Page Count	4
File Format	PDF
ISBN	0818681837
DOI	10.1109/ICIP.1997.647805
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion compensation Magnetic resonance imaging Image coding Mesh generation Bit rate Rate-distortion Costs Grid computing Encoding Deformable models
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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