Howard Wactlar Photo

Howard D. Wactlar

Vice Provost for Research Computing
Alumni Research Professor of Computer Science
Scientific Director, Quality of Life Engineering Research Center
Director, Informedia Digital Video Library Project

Previously Division Director, Information and Intelligent Systems, CISE/IIS, National Science Foundation

School of Computer Science
5000 Forbes Avenue
9011 Gates-Hillman Center
Pittsburgh, PA 15213
412.268-2571, fax 412.268-5576





  Melissa Keaton

  melissa at cs dot cmu dot edu
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Howard Wactlar serves as Vice Provost for Research Computing, Associate Dean in the School of Computer Science, and Alumni Research Professor of Computer Science.Science at Carnegie Mellon University. He has most recently been on extended leave from his university duties to serve as the
Division Director for Information and Intelligent Systems in the Computer Information Science and Engineering Directorate of the National Science Foundation.  He has served CMU in various research, technical and administrative capacities, including most recently, that of Scientific Director for the NSF Quality of Life Technology (QoLT) Engineering Research Center. He graduated in Physics from the University of Maryland and the Massachusetts Institute of Technology. He was primary architect and served as project director of the Informedia Digital Video Library, one of the original U.S. NSF Digital Library Initiative projects. He has been the principal investigator for a number of defense and intelligence agency research projects on automated video analysis and information integration, and multiple NSF and NIH-funded CareMedia-related projects in machine understanding of human health and behavior. He was a co-founder and Associate Director of the DoD-funded Software Engineering Institute (SEI) and Director of the joint CMU/IBM Information Technology Center that pioneered ubiquitous campus computing. He holds basic patents for processes related to automated video library creation and video search and summarization, and is co-inventor of a pending patent for automated video capture and analysis of human behavior. He co-founded MediaSite, organized to commercialize video information extraction and search technology. He has been active in establishing video information research programs in the U.S., Europe and China through joint initiatives with multiple foreign partners. His current research centers on multimedia information systems, machine learning and intelligent systems, and their application to improving health care.
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Research Interests

Research interests are in information retrieval systems, multimedia, speech/image/natural language understanding and distributed systems. Emphasis has been in multidisciplinary projects which led to the current large project, The Informedia Digital Video Library, which integrates several CS areas from AI to systems.
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Research Projects

Quality of Life Technology Center >>
The Quality of Life Technology (QoLT) Center is a National Science Foundation Engineering Research Center (ERC) for creating intelligent systems to support the independence of people with reduced functional capabilities due to aging or disability. The Center’s agenda is broad, ranging from basic research through the development and deployment of systems and devices in the community and transitioning them to clinical practice and commercial manufacture. It is a unique partnership between Carnegie Mellon roboticists and computer scientists with the University of Pittsburgh’s School of Health and Rehabilitation clinicians and engineers and the UPMC Institute of Aging physicians and social scientists. The research thrusts include mobility and manipulation for humans to humanoids, perception and awareness to aid and understand the individual and their environment, human systems interaction encompassing device interfaces and cognitive aids, and person and society which seeks to measure the need, effectiveness and uptake of our products.

Informedia Digital Video Library >>
Vast collections of video and audio recordings which have captured events of the last century remain a largely untapped resource of historical and scientific value. The Informedia Project at Carnegie Mellon University has pioneered new approaches for automated video and audio indexing, navigation, visualization, search and retrieval and embedded them in a system for use in education, information and entertainment environments. This project was initiated in 1994 as one of six Digital Library Initiative (DLI) projects funded jointly by NSF, DARPA and NASA, and was the only one focused on the video medium. We continue the fundamental goal of enabling for video all the functionality and capability existing for textual information retrieval, while leveraging its temporal and visual qualities for richer information delivery. Informedia-II establishes an era focused for the user as we introduce new paradigms for video information access and understanding. We aggregate and integrate video content on-demand to enable summarization and visualization that provides responses to queries in a useful broader context, perhaps with historic or geographic perspectives.

Research efforts underway apply Informedia technology to the domains of education, health care, defense intelligence and the coordination and understanding of human activity. Informedia also has international digital library collaborations in Europe and Asia that have produced multilingual, multi-cultural and cross-lingual versions.

CareMedia: Automated Video and Sensor Analysis for Geriatric Care >>
From a comprehensive audio/video patient record, this research creates a meaningful, manageable information resource that enables more complete and accurate assessment, diagnosis, treatment, and evaluation of behavioral problems for the elderly. Through activity and environmental monitoring in a skilled nursing facility, a continuous, voluminous audio and video record is captured. Through work in information extraction, behavior analysis and synthesis, this record is transformed into an information asset whose efficient, secure presentation empowers geriatric care specialists with greater insights into problems, effectiveness of treatments, and determination of environmental and social influences on patient behavior. The resulting system will detect and present emerging symptoms longitudinally, and will assist clinical decision-making, enable earlier interventions, and provide new measures of their effectiveness. CareMedia will also explore and address societal and ethical implications of technologies that capture personally identifiable data.

Informedia Contexture: Analyzing and Synthesizing Video and Verbal Context for Intelligence Analysis Dialogues >>
This research will develop tools and techniques to automatically process and extract evidence from multimedia source content to understand questions, find answers, and to organize and present the answers as "contextures" supporting the intelligence analysts' activities. We define Contexture as the weaving or assembling of multimedia parts into a coherent whole in order to provide a more complete "picture" or information structure to both questions and answers. The major innovation of this research is the automatic delivery of contextures serving as context-rich presentations that organize and summarize answers, while encouraging and facilitating review and refinement of the answer space through analyst interaction. Such contextures function more as a questioning expert human colleague than like an illustrated encyclopedic resource.
The resulting system will: interpret and communicate an associated visual and verbal context to information; determine how to query unstructured video and spoken language information sources; understand video perspectives; and develop a capability for applying and interpreting verbal, visual and modal queries that may contain language, imagery and gestures

ENVIE: Extensible News Video Information Exploitation >>
This project will develop systems and tools to automatically detect, extract, and report high interest people, patterns, and trends in visual content from foreign news. These broadcasts can provide highly valuable information, but are currently not sufficiently exploited for intelligence purposes due to the costs of analyzing such data manually. This project will increase the breadth and quality of core-level visual processing components for automatic detection of features such as speakers, logos and locations. Through integration of the core-level detectors working in multiple modalities, the project will identify people and object relationships across time and place, leading to the derivation of comprehensive video events. The automatic extraction and fusion of foreign news features will be packaged in video browsing and summarization interfaces facilitating efficient, effective access to material meeting the intelligence analysts' needs. This project will build an innovative analyst extensible system for foreign broadcast news exploitation that puts the intelligence analyst in control to better accommodate novel situations and source material.

CCRHE: Capturing, Coordinating and Remembering Human Experience >>
This project will develop algorithms and systems enabling people to query and communicate a synthesized record of human experiences derived from individual perspectives captured during selected personal and group activities. CCRHE will transform this record into a meaningful, accessible information resource, available contemporaneously and retrospectively. It will prototype personal experience capture units to record audio, video, location and sensory data, and electronic communications. Each constituent unit captures, manages, secures and associates information from its unique point of view. Each operates as a portable, interoperable, information system, allowing search and retrieval by both its human operator and remote collaborating systems. The integration of multiple points of view provides more comprehensive coverage of an event, especially when coupled with support for vastly improving the memory from each perspective. This work moves well beyond a digital video library into new information spaces composed of unedited personal experience video augmented with additional sensory and position data. Tools will be created to analyze large amounts of continuously captured digital experience data in order to extract salient features, describe scenes and characterize events. The research will address summarization and collaboration of multiple simultaneous experiences integrated across time, space and people.
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Publications, Presentations and Talks






 “Intelligent Assistive Technology Applications to Dementia Care: Current Capabilities, Limitations and Future Challenges”, Bharucha, A.J., Anand, V., Forlizzi, J., Dew, M.A., Reynolds III, C.F., Stevens, S., and Wactlar, H., American Journal of Geriatric Psychiatry. 17(2), pp. 88-104, 2009. Published, DOI: 10.1097/JGP.0b013e318187dde5


 "The Aware Community”. Wactlar, H.D., Walters, R., Bertoty, J., Hauptmann, A. International Journal of Smart Home, Vol. 3, No. 1, January, 2009, 57-65.


 "Ethical Perspectives on Emerging Assistive Technologies: Insights from Focus Groups with Stakeholders in Long-Term Care Facilities", Dorsten, A.M., Siffordk, K.S., Bharucha, A.H., Mecca, L.P., Wactlar, H., Journal of Empirical Research on Human Research Ethics (JERHRE), 4(1), pp. 25-36, 2009. DOI: 10.1525/jer.2009.4.1.25


 "Editorial: pervasive healthcare. Selected papers from the Pervasive Healthcare 2008 Conference, Tampere, Finland”. Saranummi N , Wactlar H ., Methods of Information in Medicine, 2008;47(3):175-7.


 "Prevalence of Behavioral symptoms: Comparison of the Minimum Data Set Assessments with Research Instruments. Bharucha, A.J., Vasilescu, M., Dew, M.A., Begley, A., Stevens, S., Degenholta H., Wactlar H. Journal of the American Medical Directors Association, 2008, vol 9, pp. 244-250.


 "Video Measurement of Resident-on-Resident Physical Aggression in Nursing Homes", Chen, D., Chen, Ming-yu, Wactlar, H., Gao, C., Bharucha, A. Proc. 1st ACM Workshop on Vision Networks for Behavior Analysis (VNBA), pp. 61-68. International Multimedia Conference, Vancouver, British Columbia, Canada, October 31, 2008.


 "Recognition of Aggressive Human Behavior Using Binary Local Motion Descriptors", Chen, D., Wactlar, H., Chen M.-Y., Can, G., Bharucha, A., and Hauptmann A. Proc. Engineering in Medicine and Biology Society (EMBS) 2008, pp. 5238-5241. 30th Annual International IEEE Engineering in Medicine and Biology Society (EMBC) Conference, Vancouver, British Columbia, Canada, August 20-24, 2008. DOI: 10.1109/IEMBS.2008.4650395


 "The Aware Community", Wactlar, H., Walters, R., Bertoty, J., Hauptmann. Proceedings Second International Conference on Future Generation Communication and Networking, Hainan Island, China, Dec 13-15, 2008, pp 457-462.


  "Filling the Semantic Gap in Video Retrieval: An Exploration", Hauptmann, A., Yan, R., Lin, W-H., Christel, M., Wactlar, H. [book chapter] In Semantic Multimedia and Ontologies, Y. Kompatsiaris and P. Hobson, Eds. Berlin: Springer, DOI: 10.1007/978-1-84800-076-6_10. 2008.


  "People Identification Through Ambient Camera Networks", Chen, D., Wactlar, H., Bharucha, A., International Conference on Multimedia Ambient Intelligence, Media and Sensing (AIMS), April 20, 2007.


  "Detecting Social Interaction of the Elderly in a Nursing Home Environment", Chen, D., Wactlar, H., Malkin, R., Yang, J., ACM Transactions on Multimedia Computing, Communications, and Application, February, 2007.


  "Intelligent Monitoring to Improve Safety of Older Persons", Chen, D., Wactlar, H., Bharucha, A. 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), August 23-26, 2007.


  "Can High-Level Concepts Fill the Semantic Gap in Video Retrieval?" Hauptmann, A., Yan, R., Lin, W-H., Wactlar, H. IEEE Transactions on Multimedia, 9(5), pp. 958-966, August 2007.


  "Ethical Considerations in the Conduct of Electronic Surveillance Research", Bharucha", A. J., Reynolds, C. F., III, Dew, M. A., Wactlar, H., Barnard, D., London, A. J., , Journal of Law, Medicine & Ethics, vol 34(3), Fall, 2006.


  "Automatic Collection, Analysis, Access and Archiving of Psycho/Social Behavior by Individuals and Groups", Stevens, S., Bharucha, A., Christel, A., Hauptmann, A., Wactlar, H., Chen, D. Capture, Archival and Retrieval of Personal Experiences (CARPE'06), Santa Barbara, CA, October 27, 2006.


  "Machine Perception for Occupational Therapy: Toward Prediction of Post-Stroke Functional Scores in the Home", Allin, S. J., Eckel, E., Proceedings of the 29th Rehabilitation Engineering & Assistive Technology Society of North America (RESNA) Conference, Atlanta, GA, June 22-26, 2006.


  "Facilitating Access to Large Digital Oral History Archives through Informedia Technologies ", Christel, M., Richardson, J., Wactlar H. Proc. ACM/IEEE-CS Joint Conference on Digital Libraries (JCDL'06 ), Chapel Hill, NC, pp. 194-195, June 11-15, 2006 [View Abstract]


  "Preliminary Evaluation of Automatically Analyzed Video and Sensor Data for Geriatric Care”, Bharucha, A., Pollock, B., Dew, M., Atkeson, C., Chen, D., Stevens, S., Wactlar, H., presented at the 29th Annual Meeting of the American Medical Directors Association Conference, (AMDA) Dallas, Texas, March 17, 2006.


  "Putting Active Learning into Multimedia Applications: Dynamic Definition and Refienement of Concept Classifiers". Chen, M-Y., Hauptmann, A., Christel, M., Wactlar, H. ACM Multimedia 2005, National University of Singapore, Singapore, November 6-11, 2005. [View Abstract]


  "A Study of Detecting Social Interaction in a Nursing Home Environment". Chen, D., Wactlar, H., Yang, J., International Conference on Computer Vision workshop on Human-Computer Interaction, In conjunction with the Tenth IEEE International Conference on Computer Vision (ICCV'05), Beijing, China, October 15-16, 2005. [View Abstract]


  "Digital imagery for significant cultural and historical materials”. Chen, C., Wactlar H.D., Wang, J., Kiernan, K., International Journal on Digital Libraries, Volume 5, Number 4, August, 2005, 275-286.


  "CareMedia: Automated Video and Sensor Analysis for Geriatric Care". Bharucha, A. J., Pollock, B.G., Dew, M.A., Atkeson, C., Stevens, S., Wactlar, H., Chen, D., Proceedings of the Fifth Annual WPIC Research Day, Unviersity of Pittsburgh School of Medicine, June 13, 2005. [View Abstract]


  "ENVIE: Extensible News Video Information Exploitation”, Wactlar, H., Christel, M., Hauptmann, A., Ng, T., International Conference on Intelligence Analysis, May 2005.


  "Confounded Expectations: Informedia at TRECVID 2004”. Hauptmann, A., Chen, M.Y., Christel, M., Huang, C., Lin, W.H., Ng, T., Papernick, N., Velivelli,A., Yang, J., Yan, R., Yang, H., Wactlar, H.D. In: Proceedings of (VIDEO) TREC 2004 (Thirteenth Text Retrieval Conference), Gaithersburg, MD, November, 2004.


  "Towards Automatic Analysis of Social Interaction Patterns in a Nursing Home Environment from Video". Chen, D., Wactlar, H., Yang, J., 6th ACM SIGMM International Workshop on Multimedia Information Retrieval (MIR'04), New York, New York (held in conjunction with ACM Multimedia 2004), October 15-16, 2004 [View Abstract]


  "Infrastructure for Machine Understanding of Video Observations in Skilled Care Facilities: Implications of Early Results from CareMedia Case Studies". Wactlar, H., Yang, J., Chen, D., Hauptmann, A., Christel. M., UbiComp 2004: The 2nd International Workshop on Ubiquitous Computing for Pervasive Healthcare, Applications, Nottingham, U.K., September 6-7, 2004 [View Abstract]


  "Dining Activity Analysis Using a Hidden Markov Model". Gao, J., Wactlar, H., Bharucha, A., Hauptmann, A., 17th International Conference on Pattern Recognition (ICPR'04), Cambridge, United Kingdom, August 23-26, 2004 [View Abstract]


  "Articulated Motion Modeling for Activity Analysis". Gao, J., Wactlar, H., Hauptmann, A., Collins, R.T., Third International Conference on Image and Video Retrieval (CIVR'04), Workshop on Articulated and Nonrigid Motion (ANM'04), Dublin City, Ireland, July 21-23, 2004 [View Abstract]


  "Combining Motion Segmentation with Tracking for Activity Analysis". Gao, J., Wactlar, H., Hauptmann, A., Sixth International Conference on Automatic Face and Gesture Recognition (FGR'04), Seoul, Korea, pp. 699-704, May 17-19, 2004 [View Abstract]


  "Automated Analysis of Nursing Home Observations". Wactlar, H., Yang, J., Qi, Y., Yan, R., Gao, J., Hauptmann, A., IEEE Pervasive Computing, Special Issue on Pervasive Computing for Successful Aging, vol. 3, no. 2, pp. 15-21, April-June, 2004.




  "Knowledge Lost in Information, Report of the NSF Workshop on Research Directions for Digital Libraries”. Larsen, R.L., Wactlar,H. , Chatham, MA, 2003.


  "Informedia at TRECVID 2003: Analyzing and Searching Broadcast News Video". Hauptmann, A., Ng, D., Baron, R., Chen, M-Y., Christel, M., Duygulu, Huang, C., Lin, W-H., Wactlar, H., Moraveji, N., Papernick, N., Snoek, C.G.M., Tzanetakis, G., Yang, J., Yan, R., Jin, R., Proceedings of (VIDEO) TREC 2003 (Twelfth Text Retrieval Conference), Gaithersburg, MD, November 17-21, 2003.


  "Data Analysis for a Multimedia Library". Hauptmann, A., Wactlar, H., Jin, R. Text- and Speech-Triggered Information Access, Renals, S. and Grefenstette, G. (eds), Springer, Berlin, pp. 6-37, 2003. (From the lectures of the 8th ELSNET Summer School, Chios Island, Greece, July 2000).


  "Constant Density Displays Using Diversity Sampling". Mark Derthick, Michael G. Christel , Alexander G. Hauptmann, Howard D. Wactlar. Proceedings of the 9th Annual IEEE Symposium on Information Visualization (InfoVis'03), Seattle, WA, pp. 137-144, October 19-21, 2003.


  "Toward the Automatic Assessment of Behavioral Disturbances of Dementia". Allin, A.J., Atkeson, C.G., Wactlar, H., Stevens, S., Robertson, M.J., Wilson, D., Zimmerman, J., Bharucha, A., Fifth International Conference on Ubiquitous Computing (UbiComp'03), 2nd International Workshop on Ubiquitous Computing for Pervasive Healthcare Applications, Seattle, WA, October 12-15, 2003.


  Detecting Social Interaction of Elderly in a Nursing Home Environment
Chen, D., Wactlar, H., Malkin, R., Yang, J., IEEE International Symposium on Image and Signal Processing and Analysis (ISPA'03), Special Session on Systems Perspectives in Informational Retrieval, Rome, Italy, September 18-20, 2003 [View Abstract]


  "A System of Video Information Capture, Indexing and Retrieval for Interpreting Human Activity" . Wactlar, H., Bharucha, A., Stevens, S., Hauptmann, A., Christel, M., Third International Symposium on Image and Signal Processing and Analysis (ISPA'03), Invited paper for the Special Session on System Perspectives in Information Retrieval, September 18-20, 2003. [View Abstract]


  "Associating Video Frames with Text". Duygulu, P., Wactlar, H., 26th Annual International ACM SIGIR Conference, Toronto, Canada, July 28-August 1, 2003.


  "Linking Visual and Textual Data on Video". Duygulu, P., Ng, D., Papernick, N., Wactlar, H., Workshop on Multimedia Contents in Digital Libraries, Crete, Greece, June 2-3, 2003.


  "A Cityscape Visualization of Video Perspectives". Derthick, Ml, Wactlar, H., Stevens, S., Ng, D., Hauptmann, A., Christel, M. Poster presented at the National Academy of Sciences Athur M. Sakler Colloquium on Mapping Kowledge Domains, Irvine, CA, May 2003.


  "Collages as Dynamic Summaries of Mined Video Content for Intelligent Multimedia Knowledge . Management" Ng, D., Wactlar, H., Hauptmann, A., Christel, M. AAAI Spring Symposium Series on Intelligent Multimedia Knowledge Management, Palo Alto, CA, March 24-26, 2003.


  "Interpreting Human Activity with Integrated Video Understanding and Sensor Analysis".
Wactlar, H. Keynote Speaker. Media Mill Annual Conference, University of Amsterdam, Netherlands, January 30, 2003.




  "Extracting and Visualizing Knowledge from Film and Video Archives”. Wactlar, H.D., Journal of Universal Computer Science, vol. 8, no. 6, 2002, 602-612, DOI: 10.3217/jucs-008-06-0602.


  "Collages as Dynamic Summaries for News Video". Christel, M., Ng, D., Wactlar, H., Hauptmann, A. Proceedings of the ACM Multimedia 2002, Juan-les-Pins, France, December 1-6, 2002.


  "Enriching Perspectives in Exploring Cultural Heritage Documentaries Using Informedia Technologies". Ng, T.D., Wactlar, H., Ng, T.D., Wactlar, H., 4th International Workshop on Multimedia Information Retrieval, Juan-les-Pins, France, December 6, 2002.


  "Enhanced Perspectives for Historical and Cultural Documentaries Using Informedia Technologies". Wactlar, H., Chen, C. Joint Conference on Digital Libraries (JCDL'02), Portland, Oregon, July 13-17, 2002.


  Keynote Speaker: "Extracting and Visualizing Knowledge from Film and Video Archives." I-KNOW '02 International Conference on Knowledge Management, Graz, Austria, July 11-12, 2002.


  Invited Speaker: "Technical and Infrastructure Challenges to Continuous Capture and Archiving of Broadcast Audio and Video." International Conference on Digital Libraries, IT Opportunities and Challenges in the New Millennium, Beijing, China, July 8-12, 2002.


  "Digital Video Archives: Managing through Metadata". Wactlar, H., Christel, M., In Building a National Strategy for Digital Preservation: Issues in Digital Media Archiving, Commissioned for and sponsored by the National Digital Information Infrastructure and Preservation Program, Library of Congress, April, 2002.




  "Multi-Document summarization and visualization in the informedia digital video library”. Wactlar, H.D., In: Proc. of the 12th New Information Technology Conf. Beijing: Tsinghua University Press, 2001. 323-332.


  "The Challenges of Continuous Capture, Contemporaneous Analysis, and Customized Summarization of Video Content." Wactlar, H., Defining a Motion Imagery Research and Development Program Workshop, sponsored by NCSA/NIMA/NSF, Herndon, VA, November 28-30, 2001.


  "Improving Access to Digital Video Archives through Informedia Technology." Christel, M., Hauptmann, A., Wactlar, H., Journal of the Audio Engineering Society, 49(7/8), July/August 2001.


  Lecture: "Digital Video Libraries." DELOS International Summer School of Digital Library Technologies (ISDL'01), Pisa Italy, July 9-13, 2001.


  "Demonstration of Hierarchical Document Clustering of Digital Library Retrieval Results". Valdes-Perez, R.E., Wactlar, H., Pesenti, J., Palmer, C.R., Ng, D., Hauptmann, A., Christel, M., Joint Conference on Digital Libraries (JDCL '01), Roanoke, VA (presented as a demonstration), June 24-28, 2001.


  Invited Speaker: "Multi-Document Summarization and Visualization in the Informedia Digital Video Library". Wactlar, H., New Information Technology 2001 Conference (NIT 2001), Tsinghua University, Beijing, May 29-31, 2001.




  "Data Analysis for a Multimedia Library" in Text and Speech-Triggered Information Access, Hauptmann, A.G., Jin, R. and Wactlar, H.D. Renals, S and Grefenstette, G. (eds)., Springer, Berlin, pp. 6-37, November 2000.


  Invited Speaker: "Capturing the Record of Human Experience in Video". (abstract) Wactlar, H. Asia-Pacific Economic Cooperation Workshop on Technology with Digital Museum (APEC 2000). Academic Sinica, Taipei, R.O.C. December 8-9, 2000.


  Invited Speaker: "Automated Indexing - New Theory and New Tools in Speech Recognition." Wactlar, H., International Federation of Television Archives World Conference (FIAT/IFTA), Vienna, Austria, October 15-18, 2000.


  "Complementary Video and Audio Analysis for Broadcast News Archives". H. Wactlar, A. Hauptmann, M. Christel, R. Houghton, A. Olligschlaeger Communications of the ACM, 32(2), pp.42-47, February 2000.


  "Informedia - Search and Summarization in the Video Medium". Wactlar, H., Proceedings of Imagina 2000 Conference, Monaco, January 31 - February 2, 2000.




  "Lessons Learned from the Creation and Deployment of a Terabyte Digital Video Library" . Wactlar, H., Christel, M., Gong, Y., Hauptmann, A., IEEE Computer 32(2), pp. 66-73, 1999.


  "Informedia Experience-On-Demand: Capturing, Integrating and Communicating Experiences Across People, Time and Space ". Wactlar, H., Christel, M., Hauptmann, A., Gong, Y. ACM Computing Surveys, 31(9), June, 1999.


  "New Directions in Video Information Extraction and Summarization". Wactlar, H., 10th DELOS Workshop, Santorini, Greece, June 24-25, 1999.


  "Informedia: Lessons from a Terabyte+ Operational, Digital Video Database System”. C Lichti, C., Faloutsos, C., Wactlar, H., Christel, M., Hauptmann, A., In Proceedings of Very Large Databases Conference (VLDB98), New York, August, 1998.


  "Multi-lingual informedia: a demonstration of speech recognition and information retrieval across multiple languages”. Hauptmann, A.G., Scheytt, P., Wactlar, H.D., Kennedy, P. E., In: Proceedings of DARPA Workshop on Broadcast News Transcription and Understanding Workshop, Lansdowne, VA, February 1998.


  "Transcribing Multilingual Broadcast News Using Hypothesis Driven Lexical Adaptation." Guetner, P., Finke, M., Scheytt, P., Waibel, A., Wactlar, H., DARPA Broadcast News Transcription and Understanding Workshop, Lansdowne, VA., Feb 8-11, 1998.


  "Informedia News-On-Demand: Using Speech Recognition to Create a Digital Video Library". Wactlar, H., Witbrock, M., Hauptmann, A. CMU Technical Report CMU-CS-98-109, 1998.


  "Automated video indexing of very large video libraries”. Wactlar, H. D., Hauptmann, A.G., Smith, M. A; Pendyala, K.V., Garlington, D., Society of Motion Picture and Television Engineers (SMPTE) Journal, vol. 106(8),  pp. 524-529, 1997.


  "Indexing and Search of Multimodal Information". Hauptmann, A. Wactlar, H., Proceedings of the International Conference on Acoustics, Speech and Signal Processing (ICASSP-97), Munich, Germany, April 1997.


  "Techniques for the Creation and Exploration of Digital Video Libraries". Christel, M., Kanade, T., Mauldin, M., Reddy, R., Stevens, S., Wactlar, H., Multimedia Tools and Applications (Volume 2), Borko Furht, editor. Boston, MA: Kluwer Academic Publishers, 1996.


  "The Next Generation Electronic Library - Capturing the Experience". Wactlar, H., ACM Computing Surveys, 28(4), pp. 114, December 1996.


  "Informedia Digital Video Library: Technology Outreach". Wactlar, H. D-LIB Magazine, July/August, 1996.


  "Informedia: News-on-Demand Experiments in Speech Recognition". Wactlar, H., Hauptmann, A., Witbrock, M., Proceedings of ARPA Speech Recognition Workshop. Arden House, Harriman, NY, February 18-21, 1996.


  "Intelligent Access to Digital Video: The Informedia Project". Wactlar, H., Kanade, T., Smith, M., and Stevens, S., IEEE Computer, 29(5), May 1996. Digital Library Initiative special issue.


  "Technical Challenges for the Informedia Digital Video Library." Wactlar, H., Christel, M., Stevens, S., Kanade, T., Mauldin, M., Reddy, R., Smith, M., Proceedings of International Symposium on Digital Libraries (ISDL '95), Japan, August 23-25, 1995.


  "Informedia Digital Video Library." Christel, M., Kanade, T., Mauldin, M., Reddy, R., Sirbu, M., Stevens, S., Wactlar, H., Communications of the ACM, 38(4), pp. 57-58, 1995.


  "Automated Video Segmentation for On-Demand Retrieval from Very Large Video Libraries." Wactlar, H., Hauptmann, A., Smith, M., Pendyala, K., The 138th SMPTE (Society of Motion Picture and Television Engineers) Technical Conference and World Expo, Los Angeles, CA, 1995.


  " Informedia: Improving Access to Digital Video”. Stevens, S., Christel, M., Wactlar, H. D., Interactions,Vol 1, No. 4, pp67-71, Oct 1994.


  "Informedia Digital Video Library." Christel, M., Stevens, S., Wactlar, H., Proceedings of the ACM Multimedia '94 Conference. New York: ACM, pp. 480-481, October, 1994.
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