Abstract: Software visualization addresses the visual representation of software systems, their dynamic execution, and their development process. In this context, diagrams can help software developers, software architects, or researchers understand and analyze the system, to finally improve the software and development process. Those different roles, however, come along with different perspectives and requirements for visualization tools. In my talk, I will give recent examples from my own work how those diverging perspectives can be addressed: On the one hand, high-level visualizations showing complete software systems and their evolution might be leveraged by architects and researchers. On the other hand, small visualizations embedded in the code could support developers in their daily work extending and optimizing the code. Finally, I want to conclude by giving an outlook on future perspectives on software visualization.

Biography: Fabian Beck is a postdoctoral researcher at VISUS, University of Stuttgart, Germany. In 2013, he obtained his Dr. rer. nat. (PhD) degree in computer science from University of Trier. In his dissertation, he investigated multi-dimensional coupling graph structures of software systems. In general, most of his research is focused on methods for visualizing and comparing large and dynamic graphs and hierarchies, often in the context of software systems and their evolution. In recent projects, he also studies the use of word-sized visualizations embedded in source code and text.

Janusz Konrad | ECE Department, Boston University | July 21 th, 2014, 14:00 CET | Lakeside Labs, Room L4.1.114

Abstract: How many times per day do you need to prove your identity? Perhaps 5, maybe 10 or even 20. Try to access your smartphone and you need a 4-digit PIN at minimum. Need to check email at work and you have to provide username and password. Want to enter a lab and you need to punch in a code, swipe a magnetic card or wave an RFID tag. While cards and tags can be easily lost, codes and passwords are difficult to remember once we have too many of them, and we all do! One answer to this dilemma is to use biometrics such as fingerprints, irises or facial characteristics, but should they be compromised there is no way to replace them. In this talk, I will describe our recent work on using soft biometrics jointly with gestures to authenticate a user. We implicitly use rough proportions of human body shape from skeleton data captured by Kinect camera. Should these soft biometrics become compromised, a user can easily change his/her gesture and prevent the loss of identity. I will describe details of our approach and some experimental results in which we have attained a 1-2% equal error rate on a database of 40 users. We believe this level of performance shows promise for swinging your way to security in a not-too-distant future.

Bio: Janusz Konrad earned the M.Eng. degree from the Technical University of Szczecin, Poland, and the Ph.D. degree from McGill University, Montreal, Canada. From 1989 to 2000 he was with INRS-Telecommunications, Montreal, and since 2000 with Boston University. He has been on Editorial Boards of various IEEE and EURASIP journals related to signal, image and video processing. He was the General Chair of AVSS-2013, a Technical Program Co-Chair of ICIP-2000 and AVSS-2010, and Tutorials Co-Chair of ICASSP-2004. He is a co-recipient of the 2001 Signal Processing Magazine Award, the 2004-05 EURASIP Image Communications Best Paper Award, the AVSS-2010 Best Paper Award and a co-winner of the Semantic Description of Human Activities Contest at ICPR-2010. His research interests include image and video processing, stereoscopic and 3D displays, human-computer interfaces and visual sensor networks.

http://iss.bu.edu/jkonrad

http://vip.bu.edu

Summary :

Since recent decade, the development of high quality acquisition devices for medical applications yielded migration of traditional video analysis techniques into medical domain. One of the fondamental probelms in Video analysis is motion estimation. Amongst the approaches which have been developped for this purpose, the robust motion estimators are of special interest. Initiated in the works by Black and Anondan, they are now more and more penetrating in the medical imaging and analysis. In the first part of the talk we will present a robust motion estimator from primary optical flow. Developed on the basis of robust estimator of Tukey, it allows for compensation of global motion in a video sequence.  The coherence of motion parameters allow for segmenting of video sequences for the primary  video summarisation. The results will be demonstrated on endoscopic videos. In the second part of the seminar we will be interested in primarily optical flow estimation on MRI sequences of beating heart. Here the motion compensation will be presented for MRI – guided thermotherapy, where precise motion compensation is needed for correction of temperature maps. Finally, we will give some insights in modelling of visual attention for wearable video acquisition set-ups in the studies of Instrulmental Activities of Daily living  of people with dementia for egocentric scenes interpretation.

CV :

Jenny Benois-Pineau is a distinguished professor of Computer science at the University Bordeaux, France and chair of Video Analysis and Indexing research group in Image and Sound Department of LABRI UMR 58000. She is also a deputy scientific director of theme B of French national research unity GDR CNRS ISIS. Her topics of interest include image and video analysis and indexing, motion analysis, content description and machine learning. She is the author and co-author of more than 120 papers in international journals, conference proceedings, book chapters. She has tutored an co-tutored 20 PhD students and 19 research masters. She is associated editor of EURASIP Signal Processing:Image Communication, Elsevier, Multimedia Tools and applications, Springer, She has served in numerous program committees in international conferences and workshops: ACM MM, CIVR, CBMI, AMR, IPTA, SAMT, ECMCS…
She has served as expert for European Commission since FP4 and she is a member of Multimedia Commission of French Ministry of National Education. She has been coordinator or leading researcher in international research projects Platon, Balaton, IP XMedia, Dem@care, French representative in COST292 European action, national research projects ANR and numerous projects with French industrial companies. She gave invited lectures at the universities of Sussex (GB), UPC, UAM (Spain), UNAM (Mexico), UNC at Chapel Hill, CMU, NJIT, Brooklynn Polytechnic (USA), Firenze (Italy), Vesprem (Hungary).