Now showing items 13-32 of 82

    • Closing the Loop with Graphical SLAM 

      Folkesson, John; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2007-08)
      The problem of simultaneous localization and mapping (SLAM) is addressed using a graphical method. The main contributions are a computational complexity that scales well with the size of the environment, the elimination ...
    • Co-evolution of shaping rewards and meta-parameters in reinforcement learning 

      Elfwing, Stefan; Uchibe, Eiji; Doya, Kenji; Christensen, Henrik I. (Georgia Institute of TechnologySageInternational Society for Adaptive Behavior, 2008-12)
      In this article, we explore an evolutionary approach to the optimization of potential-based shaping rewards and meta-parameters in reinforcement learning. Shaping rewards is a frequently used approach to increase the ...
    • Cognitive Systems 

      Christensen, Henrik I.; Kruijff, Geert-Jan M.; Wyatt, J.; Georgia Institute of Technology. College of Computing; Georgia Institute of Technology. Center for Robotics and Intelligent Machines (Georgia Institute of Technology, 2009-01-13)
      The present volume is a report on the research results generated by the project "Cognitive Systems for Cognitive Assistants" (CoSy), which was sponsored by the European Commission during the period 2004-2008.
    • Cognitive Vision - Sampling the Spectrum 

      Christensen, Henrik I.; Nagel, H. - H.; Georgia Institute of Technology. College of Computing; Georgia Institute of Technology. Center for Robotics and Intelligent Machines (Georgia Institute of TechnologySpringer Verlag, 2006-04)
    • Cognitive vision for efficient scene processign and object categorization in highly cluttered environments 

      Choi, Changhyun; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-10)
      One of the key competencies required in modern robots is finding objects in complex environments. For the last decade, significant progress in computer vision and machine learning literatures has increased the recognition ...
    • Computational visual attention systems and their cognitive foundation: A survey 

      Frintrop, Simone; Rome, Erich; Christensen, Henrik I. (Georgia Institute of TechnologyAssociation for Computing Machinery, 2010)
      Based on concepts of the human visual system, computational visual attention systems aim to detect regions of interest in images. Psychologists, neurobiologists, and computer scientists have investigated visual attention ...
    • Constructing a high-performance robot from commercially available parts 

      Smith, Christian; Christensen, Henrik I. (Georgia Institute of Technology, 2009-12)
      Robot manipulators were the topic of this article. A large number of robot manipulators have been designed over the last half century, and several of these have become standard platforms for R&D efforts. The most widely ...
    • Control of mobile manipulator using the dynamical systems approach 

      Ellekilde, Lars-Peter; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-05)
      The combination of a mobile platform and a manipulator, known as a mobile manipulator, provides a highly flexible system, which can be used in a wide range of applications, especially within the field of service robotics. ...
    • Cooperation based Dynamic Team Formation in Multi-Agent Auctions 

      Pippin, Charles, E.; Christensen, Henrik I. (Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers (SPIE), 2012-05)
      Auction based methods are often used to perform distributed task allocation on multi-agent teams. Many existing approaches to auctions assume fully cooperative team members. On in-situ and dynamically formed teams, reciprocal ...
    • Coordination Strategies for Multi-robot Exploration and Mapping 

      Rogers, John G.; Nieto-Granda, Carlos; Christensen, Henrik I. (Georgia Institute of TechnologySpringer Verlag, 2012-06)
      Situational awareness in rescue operations can be provided by teams of autonomous mobile robots. Human operators are required to teleoperate the current generation of mobile robots for this application; however, teleoperation ...
    • Darwinian embodied evolution of the learning ability for survival 

      Elfwing, Stefan; Uchibe, Eiji; Doya, Kenji; Christensen, Henrik (Georgia Institute of TechnologySageInternational Society for Adaptive Behavior, 2007)
      In this article we propose a framework for performing embodied evolution with a limited number of robots, by utilizing time-sharing in subpopulations of virtual agents hosted in each robot. Within this framework, we explore ...
    • Design of a Control Strategy for Teleoperation of a Platform with Significant Dynamics 

      Bratt, Mattias; Smith, Christian; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2006-10)
      A teleoperation system for controlling a robot with fast dynamics over the Internet has been constructed. It employs a predictive control structure with an accurate dynamic model of the robot to overcome problems caused ...
    • Design of an Office-Guide Robot for Social Interaction Studies 

      Pacchierotti, Elena; Christensen, Henrik I.; Jensfelt, Patric (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2006-10)
      In this paper, the design of an office-guide robot for social interaction studies is presented. We are interested in studying the impact of passage behaviours in casual encounters. While the system offers assistance in ...
    • Detecting region transitions for human-augmented mapping 

      Christensen, Henrik I.; Topp, Elin A. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-08)
      In this paper, we describe a concise method for the feature-based representation of regions in an indoor environment and show how it can also be applied for door-passage-independent detection of transitions between ...
    • Detecting structural ambiguities and transistions during a guided tour 

      Topp, Elin A.; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2008-05)
      Service robots designed for domestic settings need to navigate in an environment that they have to share with their users. Thus, they have to be able to report their current state and whereabouts in a way that is ...
    • A Discriminative Approach to Robust Visual Place Recognition 

      Pronobis, A.; Caputo, B.; Jensfelt, Patric; Christensen, Henrik I. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2006-10)
      An important competence for a mobile robot system is the ability to localize and perform context interpretation. This is required to perform basic navigation and to facilitate local specific services. Usually localization ...
    • Domestic robot ecology - an initial framework to unpack long-term acceptance of robots at home 

      Sung, Ja-Young; Grinter, Rebecca E.; Christensen, Henrik (Georgia Institute of TechnologySpringer, 2010)
      It has been recognized that long-term effects exist in the interaction with robotic technologies. Despite this recognition, we still know little about how the temporal effects are associated with domestic robots. To bridge ...
    • Dynamic, cooperative multi-robot pa trolling with a team of UAVs 

      Pippin, Charles, E.; Christensen, Henrik I.; Weiss, Lora G. (Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers (SPIE), 2013)
      The multi-robot patrolling task has practical relevance in surveillance, search and rescue, and security applications. In this task, a team of robots must repeatedly visit areas in the environment, minimizing the time ...
    • Effects of sensory precision on mobile robot localization and mapping 

      Rogers, John G.; Trevor, Alexander J. B.; Nieto-Granda, Carlos; Cunningham, Alexander; Paluri, Manohar; Michael, Nathan; Dellaert, Frank; Christensen, Henrik I.; Kumar, Vijay (Georgia Institute of Technology, 2010-12)
      This paper will explore the relationship between sensory accuracy and Simultaneous Localization and Mapping (SLAM) performance. As inexpensive robots are developed with commodity components, the relationship between ...
    • European Robot Symposium - 2006 

      Christensen, Henrik I.; Georgia Institute of Technology. College of Computing; Georgia Institute of Technology. Center for Robotics and Intelligent Machines (Georgia Institute of TechnologySpringer Verlag, 2006-03)