Content Provider	IEEE Xplore Digital Library
Author	Rivas, Jorge Ivan Rivalcoba De Gyves, Oriam Rudomin, Isaac Pelechano, Nuria
Copyright Year	2014
Description	Author affiliation: Department of Computer Science, Tecnológico de Monterrey, México, México (Rivas, Jorge Ivan Rivalcoba; De Gyves, Oriam) \|\| Computer Sciences, Barcelona Supercomputing Center, Barcelona, Spain (Rudomin, Isaac) \|\| Llenguatges i Sistemes Informàtics, Universitat Politècnica de Catalunya, Barcelona, Spain (Pelechano, Nuria)
Abstract	Our objective with this paper is to show how we can couple a group of real people and a simulated crowd of virtual humans. We attach group behaviors to the simulated humans to get a plausible reaction to real people. We use a two stage system: in the first stage, a group of people are segmented from a live video, then a human detector algorithm extracts the positions of the people in the video, which are finally used to feed the second stage, the simulation system. The positions obtained by this process allow the second module to render the real humans as avatars in the scene, while the behavior of additional virtual humans is determined by using a simulation based on a social forces model. Developing the method required three specific contributions: a GPU implementation of the codebook algorithm that includes an auxiliary codebook to improve the background subtraction against illumination changes; the use of semantic local binary patterns as a human descriptor; the parallelization of a social forces model, in which we solve a case of agents merging with each other. The experimental results show how a large virtual crowd reacts to over a dozen humans in a real environment.
Starting Page	1
Ending Page	10
File Size	905344
Page Count	10
File Format	PDF
ISBN	9789897580789
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-05
Publisher Place	Portugal
Access Restriction	Subscribed
Rights Holder	SCITEPRESS
Subject Keyword	Training Computer vision Image color analysis Computational modeling Graphics processing units Semantic Local Binary Patterns (S-LBP) Computer graphics Feature extraction Data models Crowd simulation Motion control
Content Type	Text
Resource Type	Article

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