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Michael Ryoo

Address:

4800 Oak Grove Drive
M/S 198-219
Pasadena, CA 91109

Phone:

818.354.0665

Fax:

818.393.5007
FORMER MEMBER

Michael Ryoo

Research Technologist

Biography

Michael S. Ryoo is a researcher in the Computer Vision Group at JPL. His research focuses on automated understanding of motion, events, and activities from videos. He has authored various papers on human activity recognition, and has been contributing to the field by publishing a survey paper, providing tutorials at major conferences, and organizing workshops.

Education

Ph.D. in Computer Engineering, 2008, the University of Texas at Austin
M.S. in Computer Engineering, 2006, the University of Texas at Austin
B.S. in Computer Science, 2004, Korea Advanced Institute of Science and Technology (KAIST)

Professional Experience

Computer Vision Group, Jet Propulsion Laboratory, Pasadena, CA, 2011-present
Robot Research Department, Electronics and Telecommunications Research Institute, South Korea, 2008-2011

Research Interests

Human activity recognition
Semantic video analysis
Human-robot interaction

Publications

2015
  1. M. S. Ryoo and L. Matthies, "First-Person Activity Recognition: Feature, Temporal Structure, and Prediction," International Journal of Computer Vision (IJCV), 08 January 2015.
  2. M. S. Ryoo, T. J. Fuchs, L. Xia, J. K. Aggarwal, and L. Matthies, "Robot-Centric Activity Prediction from First-Person Videos: What Will They Do to Me?," ACM/IEEE International Conference on Human-Robot Interaction (HRI), 08 January 2015.
  3. L. Xia, I. Gori, J. K. Aggarwal, and M. S. Ryoo, "Robot-Centric Activity Recognition from First-Person RGB-D Videos," IEEE Winter Conference on Applications of Computer Vision (WACV), 01 January 2015.
2014
  1. Y. Iwashita, A. Takamine, R. Kurazume, and M. S. Ryoo, "First-Person Animal Activity Recognition from Egocentric Videos," International Conference on Pattern Recognition (ICPR), 01 August 2014.
  2. S. Mann, K. Kitani, Y. J. Lee, M. S. Ryoo, and A. Fathi, "An Introduction to the 3rd Workshop on Egocentric (First-Person) Vision," IEEE Conference on Computer Vision and Pattern Recognition Workshops (CVPRW), 01 June 2014.
2013
  1. M. S. Ryoo, C.-C. Chen, J. K. Aggarwal, and A. Roy-Chowdhury, "An Overview of Contest on Semantic Description of Human Activities (SDHA) 2010," International Conference on Pattern Recognition (ICPR) Contests, 07 August 2013.
  2. M. S. Ryoo, S. Choi+, J. H. Joung+, J.-Y. Lee+, and W. Yu, "Personal Driving Diary: Automated Recognition of Driving Events from First-Person Videos," Computer Vision and Image Understanding (CVIU), 07 August 2013.
  3. Y. Iwashita+, M. S. Ryoo+, T. J. Fuchs, and C. Padgett, "Recognizing Humans in Motion: Trajectory-based Aerial Video Analysis," British Machine Vision Conference (BMVC), 07 August 2013.
  4. M. S. Ryoo and L. Matthies, "First-Person Activity Recognition: What Are They Doing to Me?," IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), 07 August 2013.
  5. J. H. Joung, M. S. Ryoo, S. Choi, and S. R. Kim, "Reliable Object Detection and Segmentation Using Inpainting," IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS), 07 August 2013.
  6. M. S. Ryoo and W. Yu, "One Video is Sufficient? Human Activity Recognition Using Active Video Composition," IEEE Workshop on Applications of Computer Vision (WACV), 07 August 2013.
  7. M. S. Ryoo, J. Lee, J. Joung, S. Choi, and W. Yu, "Personal Driving Diary: Constructing a Video Archive of Everyday Driving Events," IEEE Workshop on Applications of Computer Vision (WACV), 07 August 2013.
  8. M. S. Ryoo, J. Joung, S. Choi, and W. Yu, "Incremental Learning of Novel Activity Categories from Videos," 16th International Conference on Virtual Systems and Multimedia (VSMM), 07 August 2013.
  9. M. S. Ryoo, "Human Activity Prediction: Early Recognition of Ongoing Activities from Streaming Videos," International Conference on Computer Vision (ICCV), 07 August 2013.
  10. M. S. Ryoo+, J. T. Lee+, and J. K Aggarwal, "Video Scene Analysis of Interactions between Humans and Vehicles Using Event Context," ACM International Conference on Image and Video Retrieval (CIVR), 07 August 2013.
  11. M. S. Ryoo, "Interactive Learning of Human Activities Using Active Video Composition," International Workshop on Stochastic Image Grammars (SIG), in Proceedings of International Conference on Computer Vision (ICCV), 07 August 2013.
  12. J. H. Joung, M. S. Ryoo, S. Choi, W. Yu, and H. Chae, "Background-aware Pedestrian/Vehicle Detection System for Driving Environments," IEEE Conference on Intelligent Transportation Systems (ITSC), 07 August 2013.
2012
  1. J. K. Aggarwal and M. S. Ryoo, "Toward a Unified Framework of Motion Understanding," Image and Vision Computing, 30(8):465-466, 01 August 2012.
  2. M. S. Ryoo and J. K Aggarwal, "Stochastic Representation and Recognition of High-level Group Activities: Describing Structural Uncertainties in Human Activities," International Workshop on Stochastic Image Grammars (SIG), in Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), 31 January 2012.
  3. M. S. Ryoo and J. K. Aggarwal, "Recognition of Composite Human Activities through Context-Free Grammar based Representation," IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), 31 January 2012.
  4. M. S. Ryoo and J. K. Aggarwal, "Semantic Understanding of Continued and Recursive Human Activities," International Conference on Pattern Recognition (ICPR), 31 January 2012.
  5. M. S. Ryoo and J. K. Aggarwal, "Robust Human-Computer Interaction System Guiding a User by Providing Feedback," International Joint Conference on Artificial Intelligence (IJCAI), 31 January 2012.
  6. M. S. Ryoo and J. K. Aggarwal, "Hierarchical Recognition of Human Activities Interacting with Objects," International Workshop on Semantic Learning Applications in Multimedia (SLAM), in Proceedings of IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), 31 January 2012.
  7. M. S. Ryoo and J. K. Aggarwal, "Recognition of High-level Group Activities Based on Activities of Individual Members," IEEE Workshop on Motion and Video Computing (WACV/WMVC), 31 January 2012.
  8. M. S. Ryoo and J. K Aggarwal, "Human Activities: Handling Uncertainties Using Fuzzy Time Intervals," International Conference on Pattern Recognition (ICPR), 31 January 2012.
  9. M. S. Ryoo and J. K Aggarwal, "Spatio-Temporal Relationship Match: Video Structure Comparison for Recognition of Complex Human Activities," International Conference on Computer Vision (ICCV), 31 January 2012.
  10. J. T. Lee, M. S. Ryoo, and J. K Aggarwal, "View Independent Recognition of Human-vehicle Interactions using 3-D Models," IEEE Workshop on Motion and Video Computing (WACV/WMVC), 31 January 2012.
  11. M. S. Ryoo and J. K. Aggarwal, "Observe-and-Explain: A New Approach for Multiple Hypotheses Tracking of Humans and Objects," IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR), 31 January 2012.
  12. M. Bhargava, C.-C. Chen, M. S. Ryoo, and J. K. Aggarwal, "Detection of Abandoned Objects in Crowded Environments," IEEE International Conference on Advanced Video and Signal based Surveillance (AVSS), 31 January 2012.
  13. J. T. Lee, M. S. Ryoo, M. Riley, and J. K. Aggarwal, "Real-time Detection of Illegally Parked Vehicles using 1-D Transformation," IEEE International Conference on Advanced Video and Signal based Surveillance (AVSS), 31 January 2012.
2011
  1. M. S. Ryoo and J. K. Aggarwal, "Stochastic Representation and Recognition of High-level Group Activities," International Journal of Computer Vision (IJCV), 93(2):183-200, 01 June 2011.
  2. J. K. Aggarwal and M. S. Ryoo, "Human Activity Analysis: A Review," ACM Computing Surveys (CSUR), 43(3), 01 April 2011.
2010
  1. M. S. Ryoo, K. Grauman, and J. K. Aggarwal, "A Task-Driven Intelligent Workspace System to Provide Guidance Feedback," Computer Vision and Image Understanding (CVIU), 114(5):520-534, 01 May 2010.
2009
  1. J. T. Lee, M. S. Ryoo, M. Riley, and J. K. Aggarwal, "Real-Time Illegal Parking Detection in Outdoor Environments Using 1-D Transformation," IEEE Transactions on Circuits and Systems for Video Technology (T-CSVT), 19(7):1014-1024, 01 July 2009.
  2. M. Bhargava, C.-C. Chen, M. S. Ryoo, and J. K. Aggarwal, "Detection of Object Abandonment Using Temporal Logic," Machine Vision and Applications (MVA), 20(5):271-281, 01 June 2009.
  3. M. S. Ryoo and J. K Aggarwal, "Semantic Representation and Recognition of Continued and Recursive Human Activities," International Journal of Computer Vision (IJCV), 82(1):1-24, 01 April 2009.
2005
  1. H. S. Yang, Y. Seo, M. S. Ryoo, and H. Jung, "Affective Communication System with Emotional Memories for Multimodal Interaction with Humanoids," 11th International Conference on Virtual Systems and Multimedia (VSMM), 01 October 2005.
  2. M. S. Ryoo, Y. Seo, H. Jung, and H. S. Yang, "Affective Dialogue Communication System with Emotional Memories for Humanoid Robots," International Conference on Affective Computing and Intelligent Interaction (ACII), 01 October 2005.
  3. D. Pardoe, M. Ryoo, and R. Miikkulainen, "Evolving Neural Network Ensembles for Control Problems," Genetic and Evolutionary Computation Conference (GECCO), 01 June 2005.
2004
  1. H. Jung, Y. Seo, M. S. Ryoo, and H. S. Yang, "Affective Communication System with Multimodality for Humanoid Robot AMI," IEEE-RAS/RSJ International Conference on Humanoid Robots (Humanoids), 01 November 2004.