• Title, Summary, Keyword: Crowd Simulation

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Large-Scale Realtime Crowd Simulation Using Image-Based Affordance and Navigation Potential Fields (이미지 기반의 유도장과 항해장을 활용한 실시간 대규모 군중 시뮬레이션)

  • Ok, Soo-Yol
    • Journal of Korea Multimedia Society
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    • v.17 no.9
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    • pp.1104-1114
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    • 2014
  • In large-scale crowd simulations, it is very important for the decision-making system of manipulating interactive behaviors to minimize the computational cost for controlling realistic behaviors such as collision avoidance. In this paper, we propose a large-scale realtime crowd simulation method using the affordance and navigation potential fields such as attractive and repulsive forces of electromagnetic fields. In particular, the model that we propose locally handles the realistic interactions between agents, and thus radically reduces the cost of expensive computation on interactions which has been the most problematic in crowd simulation. Our method is widely applicable to the expression and analysis of various crowd behaviors that are needed in behavior control in computer games, crowd scenes in movies, emergent behaviors of evacuation, etc.

Implementation of a Virtual Crowd Simulation System

  • Jeong, Il-Kwon;Baek, Seong-Min;Lee, Choon-Young;Lee, In-Ho
    • 제어로봇시스템학회:학술대회논문집
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    • pp.2217-2220
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    • 2005
  • This paper introduces a practical implementation of virtual crowd simulation software. Usual commercial crowd simulation softwares are complex and have program-like script interfaces, which makes an animator hard to learn and use them. Based on the observations that most crowd scenes include walking, running and fighting movements, we have implemented a crowd simulation system that automatically generates movements of virtual characters given user's minimal direction of initial configuration. The system was implemented as a plug-in of Maya which is one of the most commonly used 3D software for movies. Because generated movements are based on optically captured motion clips, the results are sufficiently natural.

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High Density Crowd Simulation based on SPH (Smoothed Particle Hydrodynamics 기반 고 밀집 군중 시뮬레이션 기법)

  • Kang, Shin-Jin;Lee, Jung;Kim, Soo-Kyun
    • Journal of Korea Game Society
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    • v.11 no.6
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    • pp.193-199
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    • 2011
  • Producing high density crowd simulation is time-consuming task as increasing the number of individuals in the crowds. In this paper, we propose a new control technique that can create realistic high density crowd simulation by using Smoothed Particle Hydrodynamics (SPH) method from fluid simulation field. Equations in SPH method are modified for evacuation, distance maintenance, and group maintenance forces for individual behaviors in the crowds. Experimental results showed that the proposed system could enable natural high density crowd simulation efficiently.

Detecting Collisions in Graph-Driven Motion Synthesis for Crowd Simulation (군중 시뮬레이션을 위한 그래프기반 모션합성에서의 충돌감지)

  • Sung, Man-Kyu
    • Journal of KIISE:Computer Systems and Theory
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    • v.35 no.1
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    • pp.44-52
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    • 2008
  • In this paper we consider detecting collisions between characters whose motion is specified by motion capture data. Since we are targeting on massive crowd simulation, we only consider rough collisions, modeling the characters as a disk in the floor plane. To provide efficient collision detection, we introduce a hierarchical bounding volume, the Motion Oriented Bounding Box tree (MOBB tree). A MOBBtree stores space-time bounds of a motion clip. In crowd animation tests, MOBB trees performance improvements ranging between two and an order of magnitude.

Emotion-Based Dynamic Crowd Simulation (인간의 감정에 기반한 동적 군중 시뮬레이션)

  • Moon Chan-Il;Han Sang-Hoon
    • Journal of the Korea Society of Computer and Information
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    • v.9 no.3
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    • pp.87-93
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    • 2004
  • In this paper we present a hybrid model that enables dynamic regrouping based on emotion in determining the behavioral pattern of crowds in order to enhance the reality of crowd simulation in virtual environments such as games. Emotion determination rules are defined and they are used for dynamic human regrouping to simulate the movement of characters through crowds realistically. Our experiments show more natural simulation of crowd behaviors as results of this research.

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Dynamic Crowd Simulation by Emotion-based Behavioral Control of Individuals (개체의 감정기반 행동제어를 통한 동적 군중 시뮬레이션)

  • Ahn, Eun-Young;Kim, Jae-Won;Han, Sang-Hoon;Moon, Chan-Il
    • The Journal of the Korea Contents Association
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    • v.9 no.11
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    • pp.1-9
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    • 2009
  • In virtual environments, such as computer game and animation, we need to enhance naturalness of crowd simulation. So, we propose a method to generate dynamically moving crowd patterns by applying emotional factors to the individual characters of a crowd in the determination of their behavior. The proposed method mimics human behavior and controls each character in a group to decide its own path according to its individual status. And it is able to generate various moving patterns as a result of letting the individuals go to another group depending upon their conditions. In this paper, some temperament and feeling factors are defined and determination rules for calculating the emotional status are also proposed. Moreover we use a fuzzy theory for accurate representation of the ambiguous expressions such as feeling bad, feeling good and so on. Our experiments show that the suggested method can simulate virtual crowd in more natural and diverse ways.

Modeling and simulation of large crowd evacuation in hazard-impacted environments

  • Datta, Songjukta;Behzadan, Amir H.
    • Advances in Computational Design
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    • v.4 no.2
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    • pp.91-118
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    • 2019
  • Every year, many people are severely injured or lose their lives in accidents such as fire, chemical spill, public pandemonium, school shooting, and workplace violence. Research indicates that the fate of people in an emergency situation involving one or more hazards depends not only on the design of the space (e.g., residential building, industrial facility, shopping mall, sports stadium, school, concert hall) in which the incident occurs, but also on a host of other factors including but not limited to (a) occupants' characteristics, (b) level of familiarity with and cognition of the surroundings, and (c) effectiveness of hazard intervention systems. In this paper, we present EVAQ, a simulation framework for modeling large crowd evacuation by taking into account occupants' behaviors and interactions during an emergency. In particular, human's personal (i.e., age, gender, disability) and interpersonal (i.e., group behavior and interactions) attributes are parameterized in a hazard-impacted environment. In addition, different hazard types (e.g., fire, lone wolf attacker) and propagation patterns, as well as intervention schemes (simulating building repellent systems, firefighters, law enforcement) are modeled. Next, the application of EVAQ to crowd egress planning in an airport terminal under human attack, and a shopping mall in fire emergency are presented and results are discussed. Finally, a validation test is performed using real world data from a past building fire incident to assess the reliability and integrity of EVAQ in comparison with existing evacuation modeling tools.

Fish Schooling Animation System for Constructing Contents of Cyber Aquarium

  • Kim, Jong-Chan;Kim, Eung-Kon
    • The Journal of the Korea institute of electronic communication sciences
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    • v.2 no.3
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    • pp.157-162
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    • 2007
  • The goal of researching a proper crowd animation is to design system that is satisfied with the reality of scenes, performance of system, and interaction with users to show the crowd vividly and effectively in virtual underwater world. In this paper, we smartly expressed the behavior patterns for flocks of fish in virtual underwater and we made up for the weak points in spending time and cost to produce crowd animation. We compared with the number of mesh, the number of fish, the number of frame, elapsed time, and resolution and analyzes them with the fish behavior simulating system. We developed a virtual underwater simulator using this system.

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VR-simulated Sailor Training Platform for Emergency (긴급상황에 대한 가상현실 선원 훈련 플랫폼)

  • Park, Chur-Woong;Jung, Jinki;Yang, Hyun-Seung
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.175-178
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    • 2015
  • This paper presents a VR-simulated sailor training platform for emergency in order to prevent a human error that causes 60~80% of domestic/ abroad marine accidents. Through virtual reality technology, the proposed platform provides an interaction method for proficiency of procedures in emergency, and a crowd control method for controlling crowd agents in a virtual ship environment. The interaction method uses speech recognition and gesture recognition to enhance the immersiveness and efficiency of the training. The crowd control method provides natural simulations of crowd agents by applying a behavior model that reflects the social behavior model of human. To examine the efficiency of the proposed platform, a prototype whose virtual training scenario describes the outbreak of fire in a ship was implemented as a standalone system.

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