NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Geo-Marine Sciences (IJMS) >
IJMS Vol.38 [2009] >
IJMS Vol.38(3) [September 2009] >


Title: Underwater crowd flow detection using Lagrangian dynamics
Authors: Soori, Umair
Arshad, Mohd Rizal
Keywords: Fish schooling
Lagrangian Coherent Structure (LCS)
Finite-time Lyapunov Exponent (FTLE) field
Issue Date: Sep-2009
Publisher: CSIR
Abstract: Crowd flow in an underwater scene is used to study fish schooling characteristics. The hydromechanics of fish schooling is quite complicated because it varies in the types of fish underwater. Fish schooling detection contributes toward the study of their locomotion, perception and behavior. For this scenario, we opted to use Lagrangian particle dynamics had been applied to examine the trajectories of an individual particle in the flow. The mathematical algorithm of the Lagrangian Coherent Structure (LCS) is the Finite-time Lyapunov Exponent (FTLE) field the divergence of the particles. The FTLE field is a boundary that divides the flow with respect to its distinct flow dynamics. The algorithm can also do real-time video analyses which can easily be implemented in Autonomous Underwater Vehicles (AUVs). The system is efficient enough to perform the detection of fish schooling as a group flow.
Page(s): 359-364
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Source:IJMS Vol.38(3) [September 2009]

Files in This Item:

File Description SizeFormat
IJMS 38(3) 359-364.pdf805.23 kBAdobe PDFView/Open
 Current Page Visits: 685 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 620842 since 06-Feb-2009  Last updated on 13-Nov-2014Webmaster: nopr@niscair.res.in