NDLI: NRSfM using local rigidity

Content Provider	IEEE Xplore Digital Library
Author	Rehan, A. Zaheer, A. Akhter, I. Saeed, A. Haris Usmani, M. Mahmood, B. Khan, S.
Copyright Year	2014
Description	Author affiliation: Syed Babar Ali Sch. of Sci. & Eng., Lahore Univ. of Manage. Sci., Lahore, Pakistan (Rehan, A.; Zaheer, A.; Akhter, I.; Saeed, A.; Haris Usmani, M.; Mahmood, B.; Khan, S.)
Abstract	In this paper we show that typical nonrigid structure can often be approximated well as locally rigid sub-structures in time and space. Specifically, we assume that: 1) the structure can be approximated as rigid in a short local time window and 2) some point- pairs stay relatively rigid in space, maintaining a fixed distance between them during the sequence. First, we use the triangulation constraints in rigid SfM over a sliding time window to get an initial estimate of the nonrigid 3D structure. Then we automatically identify relatively rigid point-pairs in this structure, and use their length-constancy simultaneously with triangulation constraints to refine the structure estimate. Local factorization inherently handles small camera motion, short sequences and significant natural occlusions gracefully, performing better than nonrigid factorization methods. We show more stable and accurate results as compared to the state-of-the art on even short sequences starting from 15 frames only, containing camera rotations as small as 2° and up to 50% contiguous missing data.
Sponsorship	IEEE Comput. Soc.
Starting Page	69
Ending Page	74
File Size	1203675
Page Count	6
File Format	PDF
ISBN	9781479949854
DOI	10.1109/WACV.2014.6836116
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-03-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Abstracts Trajectory Optimization Transforms
Content Type	Text
Resource Type	Article

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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
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