Abstract: Recent trends in large-scale image retrieval consider image representations based on the Bag of Visual Words model, because such representation enables efficient filtering using inverted files, while for more effective retrieval the representation can be enhanced by VLAD or Hemming embedding. In order to improve the effectiveness of the retrieval even more, some models try to relax from Bag of Visual Words model (i.e., from a shared feature space dictionary) and model content of multimedia objects by means of so-called feature signatures. Whereas the effectiveness of models based on feature signatures seems to be promising for several retrieval tasks, the efficiency of the models still represents a serious performance bottleneck, because the models employ expensive adaptive distance measures to compare two feature signatures. In this talk, we present several recent approaches that significantly improve the efficiency of the retrieval when using models based on feature signatures, making the models applicable also for large-scale image retrieval.

CV: Jakub Lokoc received the doctoral degree in software systems from the Charles University in Prague, Czech Republic. He is an assistant professor in the Department of Software Engineering at the Charles University in Prague, Faculty of Mathematics and Physics, Czech Republic. He is a member of siret research group and his research interests include metric access methods, multimedia retrieval and exploration, and similarity modeling.

Der Rückblick zum TEWI-Kolloquium von Martin Varela am 27.10.2014 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

[iframe height=“350″ src=“http://video.aau.at/video.php?video=ftf_valera.mp4″]

Slides

Abstract: In this talk I’ll discuss some ideas about the reasons, both technical and business-related why we care about Quality of Experience (QoE). I’ll present some results related to QoE-driven network and application-level management, and first steps into economically exploiting QoE models, in particular concerning Service Level Agreements, as well as some enablers for doing so.

Bio: Martín Varela received his PhD and MSc from the University of Rennes 1 (Rennes,France), in 2005 and 2002 respectively. He has been an ERCIM fellow, and spent time at SICS and VTT, where he is currently a Principal Scientist. His research interests lie in the QoE domain, with a particular focus on real-time QoE estimates for generic services and applications thereof. He is currently leading VTT’s work on QoE, and is a Finnish management committee member for COST Action IC1003 Qualinet. He has also served as Scientific Coordinator for the Celtic Plus QuEEN project. He is currently co-chair for the IEEE MMTC QoE Interest Group.

Abstract: Streaming data are relevant in finance, computer science, and engineering while they are becoming increasingly important in medicine and biology. In particular, classification, clustering and structural learning of streaming data are receiving increasing attention. These tasks require algorithms and models capable to represent dynamic, sequence and time. Dynamic Bayesian networks and hidden Markov models are used to analyze streaming data. However, these models are concerned with equally spaced time data and thus suffer from several limitations because it is not clear how to discretize timestamps. The talk introduces continuous time Bayesian networks and continuous time Bayesian networks classifiers. Algorithms for parametric and structural learning of continuous time Bayesian network models to solve classification, clustering and structural learning based on multivariate discrete state continuous time trajectories are described. Stationary and non-stationary continuous time Bayesian networks are presented together with their structural learning based on the marginal likelihood approach. Numerical experiments concerning real world applications in finance, biomedicine, neurology and biology are presented.

CV: Prof Fabio Stella is an associate professor at the Dipartimento di Informatica, Sistemistica e Comunicazione of the Università degli Studi di Milano-Bicocca. His research focuses on models and algorithms for data analysis and decision making under uncertainty in the areas of Business Intelligence, Data and Text Mining and Computational Finance. In the winter term 2014/15 he is giving the course 625.605 – Business Intelligence in Klagenfurt.

WHAT:

• Life at YouTube: An Engineering Perspective
• What is Content ID (Tech Talk)
• Career Opportunities
• Q&A

WHO:

• Thomas Walland
• Technical Program Manager
• YouTube/Google

WHEN:

• 11. November 2014, 16:00
• Duration: ca. 2h, then snacks, drinks & chat

WHERE:

• Alpen-Adria Universität,
• Klagenfurt
• Room Z.1.09

WHY: To do cool things that matter!

DETAILS:

• Entrance free of charge but …
• Registration is required: goo.gl/fyNaHl

What is Content ID?

Copyright owners can use a YouTube specific system called Content ID to easily identify and manage their content on YouTube. Videos uploaded to YouTube are scanned against a database of files that have been submitted by content owners. Copyright owners get to decide what happens when content in a video on YouTube matches a work they own. When this happens, the video gets a Content ID claim.

About Thomas (Bio)

• Graduated from HTL Mössingerstrasse in 2001
• Graduated from Alpen-Adria Universität Klagenfurt in 2007
• Product Manager @ Upper Network in Graz, AT
• Product Manager @ Bwin.party digital entertainment in Vienna, AT
• Product Manager @ Scout24 Schweiz AG in Flamatt, CH (close to Bern)
• Technical Program Manager YouTube @ Google Switzerland in Zurich, CH
• For more details, check out my LinkedIn profile or reach out to thomas.walland@gmail.com

Der Rückblick zum TEWI-Kolloquium von Dr. Fabian Beck am 03.09.2014 beinhaltet die Videoaufzeichnung sowie die Folien:

Video

[iframe height=“350″ src=“http://video.aau.at/video.php?video=ftf_beck.mp4″]

Slides

[iframe src=“http://www.slideshare.net/slideshow/embed_code/38904796″ width=“476″ height=“400″ frameborder=“0″ marginwidth=“0″ marginheight=“0″ scrolling=“no“]

Abstract

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.

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