NDLI: Discovering and Describing Activities by Trajectory Analysis

Content Provider	IEEE Xplore Digital Library
Author	Guodong Tian Chunfeng Yuan Weiming Hu Ruiguang Hu
Copyright Year	2013
Description	Author affiliation: Nat. Lab. of Pattern Recognition, Inst. of Autom., Beijing, China (Guodong Tian; Chunfeng Yuan; Weiming Hu; Ruiguang Hu)
Abstract	We propose a novel framework which automatically discovers and semantically describes typical activity patterns in surveillance situations, by analyzing object trajectories. In our framework, an activity pattern contains three elements: a) the source, b) the sink and c) the motion pattern. The sources and sinks in the scene are learned by clustering endpoints (origin and destination) of trajectories. The motion patterns in our framework are only related to temporal dynamics and invariant for spatial translation. They are learned through a 2-level hierarchical model. In the first level, the atomic motion patterns are learned by trajectory segmentation and sub-trajectory clustering. In the second level, the motion patterns are learned by clustering the sequences of atomic motion patterns. Combining the learned sources, sinks and motion patterns, activity patterns are easily distinguished and described in natural language. The effectiveness of our method is demonstrated by experiments on vehicle trajectories extracted in traffic scenes.
Starting Page	652
Ending Page	656
File Size	487703
Page Count	5
File Format	PDF
ISBN	9781479921904
DOI	10.1109/ACPR.2013.70
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-11-05
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Atomic measurements Semantic description Motion segmentation Semantics Hidden Markov models Activity discovery Dirichlet process Trajectory Trajectory analysis Vehicles Videos
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
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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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