Software-Based Adjustment for Static Parallax Barriers for Autostereoscopic Mobile Displays – Martin Marko Paprock

Date: 02 May 2012
Time: 13.00-14.00
Place: NJ14 3-228

We show that the autostereoscopic display of stereoscopic images using a static parallax barrier can be improved by adapting the rendering to the angle under which the user is looking at a mobile display; thus, ghosting artifacts and depth reversals can often be avoided even if the user tilts the mobile device. Instead of moving the barrier itself to compensate for a misplacement of the device in relation to the user, a pixel column shifting in software can provide a similar compensation. This requires a parallax barrier where each section covers two pixel columns at a time. The proposed method has been implemented using OpenGL shaders and a parallax barrier that was designed for a display of exactly half the resolution of the employed display. Technical tests showed a good left and right image separation with a viewing angle of up to 60 degrees. Preliminary user tests indicate that an improvement in stereo experience can be observed.

Games through Cultures & Cultures through Games – Rilla Khaled

Date: 23 April 2012 (Monday!)
Time: 13.00-14.00
Place: NJ14 4-107

Human culture and human cultural values are fundamental to all aspects of our lives. It is natural, then, to consider the impact of such a fundamental element of human life on video games. At present, the attention paid to human culture in game studies has tended to revolve around three areas: representations of culture and different cultural groups in video game worlds, appropriations of video games amongst cultural groups, and the development of subcultures within or around particular games and genres. Beyond considerations of human cultures and their representations and interactions with video games, however, we can draw further structural connections. Cross-cultural research
conceptualises human culture in terms of some of the same structures we often use to understand games. If we map video games to cultures, we can view play as actions within a culture that supports and encourages particular sets of values and modes of behaviour, while discouraging, disallowing, and punishing other sets of values and modes of behaviour. Just as in human cultures, cultural members learn to rely on cultural rules for survival and progression, within games, players learn to do the same.

In this talk, I will present the perspective that video games do and arguably must embody human culture and cultural values in both their representational and mechanical layers. I will show how cross-cultural psychology and descriptions of human values can be applied to video games to yield insight into the nature of our interactions with them. I will present how cultural values manifest themselves in two contrasting video games, The Sims 3 and Fallout 3, using the widely accepted cultural constructs of individualism and collectivism. In
addition, I will present a case study of a previous project concerning the design of the culturally-relevant persuasive game, Smoke? Following from the implications of the analyses and the case study, I will present new design directions as yet underdeveloped in current video games, particularly in the form of human cultural values from non-Western cultures.

Bio
Rilla Khaled is an assistant professor at the Center for Computer Games Research at the IT University of Copenhagen, and has a PhD in Computer Science from the Victoria University of Wellington in New Zealand. Her current research focuses on how to design more effective and meaningful serious and persuasive games, the interactions between
games and culture, how to adapt game design methods to foster creativity and design diversity, and humour in games. She is involved in a number of research projects, including the EU FP7-funded SIREN serious game project and the Danish-funded Games for Health project. Her previous PhD research focused on culturally-relevant persuasive games, and established that designing for cultural relevance leads to greater persuasion. As Rilla’s background is in software engineering and cross-cultural psychology, her interests extend from the software-level design and development of games up to their higher level effects on and as cultural practices.

Culturally-Aware Systems: A World of Opportunities – Emmanuel Blanchard

Date: 21 March 2012
Time: 13.00-14.00
Place: NJ14 3-228 (Las Vegas)

In this presentation, I will present a trend of my research focusing on relations between culture and technology. I will discuss this topic from two different perspectives: culture for technology, and technology for culture. There will be a particular focus on knowledge representation, human-computer interaction and educational technology, the idea being to approach several of my research interests  going from cultural modeling and cultural knowledge gathering, to serious games for intercultural education.

Bio
Emmanuel G. BLANCHARD received his M.Sc. and Ph.D. from University of Montréal, Canada in 2003 and 2007 respectively. His Ph.D thesis entitled “Motivation and Culture in e-Learning” has appeared on the list of honor of the Dean of Graduate Studies in 2007. His research is focused on the inclusion of human factors in (educational) technology, which has highly influenced his educational and work background. After completing his Ph.D, he was successively a guest researcher at Osaka University, where he trained to formal ontology engineering, a postdoctoral fellow in the Department of Educational and Counselling Psychology of McGill University where he improved his expertise in cognitive and educational psychology, and a senior lecturer at Polytechnic of Namibia in Africa in order to improve his understanding of cultural dynamics. Dr Blanchard has been especially active at supporting the emerging field of culturally-aware technology. He created and co-chaired the three editions of the international workshop on “Culturally-Aware Tutoring Systems”. He is the lead editor of the “Handbook of Research on Culturally-aware Information Technology: Perspectives and Models”, and is frequently requested to act as a program committee member or reviewer for major conferences and journals in the field of educational technologies (ITS, AIED, ECTEL, ACM SIGCHI, ICCE, CSEDU, IJTLT, IJEL, AI & Society).

A glimpse of the big picture in mobile multimedia – Hendrik Knoche

Date: 09 March 2012 (Friday!)
Time: 11.00-12.00
Place: NJ14 3-228

Mobile devices and services are rapidly becoming the preeminent conduit for human computer interaction. This talk will focus on two areas of research in this domain. The first looks at the user experience of watching videos on mobile devices and the second explores how mobile applications and devices can be enhanced for use by illiterate people.

Mobile services rely on wireless spectrum, a shared and scarce resource that service providers like to allocate economically, especially for resource intensive multimedia applications. Therefore, they need to know at which point the user experience becomes unacceptable due to under-resourced video quality. My research has explored these limits of user experience and how they should be measured. I will describe how a mix of quantitative and qualitative approaches has provided evidence that the user experience cannot be properly understood through the common approach of video quality but requires the more comprehensive notion of visual experience.

I will also highlight some of the design and methodological challenges that appear when creating and evaluating mobile applications for and with illiterates users based on ongoing research that I am conducting as part of an ICT for development project in rural India.

Bio
Hendrik Knoche holds an MSc (UoHamburg) and PhD (UC London) in computer science. His research interests include human-centered design, design thinking, mediated experiences, proxemics, and ICT for development along with methods for prototyping and evaluating applications and their user experiences “in the wild”.

Beware of classical statistics – Jesper Kjær Nielsen

Date: 7 March 2012
Time: 13.00-14.00
Place: NJ14 3-228 (Las Vegas)

When people are first exposed to statistics, they usually learn about (un)biased estimators, confidence intervals, and p-values. These concepts (and several others) have their roots in the statistical school called classical statistics or sampling theory, and they are widely used
inference tools among students and researchers. However, the inference results obtained by classical statistics are not always sensible and are often misinterpreted.

This talk aims at demonstrating some of the problems with classical statistics and how these problems can be avoided by using Bayesian statistics instead. In particular, we consider three simple examples which are described below.

  1. Point Estimation: Are optimal estimators always unbiased?
    Case: If you observe N IID samples from a Gaussian distribution with unknown mean and variance, what is the best way to estimate the variance?
  2. Interval Estimation: How you should NOT interpret a confidence interval.
    Case: If you observe N IID samples from a uniform distribution with unknown mean but known width, how do you find and interpret a confidence interval for the mean?>
  3. Hypothesis testing: p-values depend on irrelevant information.
    Case: If you observe the sequence HHHTHHHHTHHT of IID coin flips, do you accept or reject the hypothesis that the coin is unbiased?

We also briefly comment on the (mostly practical) problems of Bayesian statistics and give a few real world simulation examples demonstrating its usefulness.

Bio
Jesper Kjær Nielsen was born in Struer, Denmark, in 1982. He received the B.Sc and M.Sc (Cum Laude) degrees in electrical engineering from Aalborg University, Aalborg, Denmark, in 2007 and 2009, respectively. He is currently with the Department of Electronic Systems, Aalborg University, as a Ph.D. student. He has been a Visiting Scholar at the Signal Processing and Communications Laboratory, University of Cambridge and at the Department of Computer Science, University of Illinois at Urbana-Champaign. His research interests include spectral estimation, (sinusoidal) parameter estimation as well as statistical and Bayesian methods for signal processing.

Experiences from field studies in Namibia – Kasper Rodil

Date: 29 February 2012
Time: 13.00-14.00
Place: NJ14 3-228 (Las Vegas)

I will talk about my everyday work at Polytechnic of Namibia and present the field trips and results focusing on best practices for planning and conducting these field trips. You will also get insights into the challenges of doing experiments in the rural back country of Namibia.

Bio
Kasper Rodil graduated as M.Sc. from Medialogy in 2011 at AAU.  He has had a long commitment with virtual spaces and digital visualisations, and based on a 9th sem. project on preserving indigenous knowledge, he was offered a job as Research Fellow at the Polytechnic of Namibia. During his contract with Polytechnic of Namibia, he ran an honours course in 3D digital visualizations and Game mechanics while continuing research on how to communicate, co-design and preserve indigeous knowledge through digital visualizations.

3D Computer Vision for Weed Detection – Wajahat Kazmi

Date: 15 February 2012
Time: 13.00-14.00
Place: NJ14 3-228 (Las Vegas)

In agricultural production, weeds compete with crops for nutrition, sunlight and water. If uncontrolled, they may outnumber the crop plants and cause heavy loss to the yield. In order to control weeds, typical method is application of herbicide chemicals. Indiscriminate use of chemicals, on the other hand, is detrimental to environment and a lot of research has been done to control the quantities of chemicals in farming. Still, the utmost precision of applying the herbicides only when and where needed (known as Site Specific Weed management ‐ SSWM) is a big challenge because it requires an automatic computerized system of constantly monitoring all the plants in a field.

The research under this PhD study addresses this problem. It is focused at developing tools for an autonomous  ground vehicle (robot) for weed detection in sugar beet fields using 3D image data. So far, predominantly 2D images have been used in research in weed detection. A prerequisite for use of 2D data is that the individual plants are well separated not occluding each other. When plants grow in size, overlapping canopies make this approach difficult to resolve plants and analyze their structures. In such a case, 3D data will be beneficial. In this way, this study will help in localized spray of chemicals, hence reducing the amount of chemicals used in farming using image processing and computer vision.

This PhD study is financed by Danish Council of Strategic Research under project ASETA (Adaptive Surveying and Early treatment of crops with a Team of Autonomous vehicles) which also involves aerial vehicles and aerial imaging. Major research work will be carried out at Department of Architecture and Media Technology, Aalborg University, Aalborg, while the test campaigns will take place in the fields prepared by University of Copenhagen, Department of Agriculture and  Ecology at Taastrup.

Hoarding the Lute: OMR and crowd-sourcing strategies for building a music archive – David Lewis

Date: 16 November 2011
Time: 12.30-13.30
Place: NJ14 

Music for the lute and its relatives played a central role in the European cultural landscape for centuries until the rise of the piano in the late 18th Century saw its decline. That the music remains little known and under-represented in music histories is perhaps due almost entirely to its notation — the tablatures used are very different to the staff notation used for most other music of the time.

In my talk, I introduce the music and its notation and describe a proposed project to use Optical Music Recognition technologies currently being developed to digitise the complete printed lute music holdings of several libraries. Amateur lutenists and enthusiasts would then be recruited to correct and edit the resulting collection online, resulting in a large, searchable resource, which could make the music available in forms that are more accessible to non-specialists or that are capable of machine-analysis.

Bio
David Lewis trained as a historical musicologist at Kings College, London. He has since specialised in developing computer tools for musicologists or musicians. He is currently based at the Birmingham Conservatoire, where he is developing a score editor and technical infrastructure for a new complete edition and translation of the theoretical works of Johannes Tinctoris (building on earlymusictheory.org/tinctoris/tinctoris.html), and at Goldsmiths, University of London, where he has worked on a lute music corpus (www.ecolm.org) and a general-purpose music-processing framework called AMusE. He is also a doctoral student in the Goldsmiths computing department.

Business Interaction Zquad (BIZ) – Niels Einar Veirum

Date: 9 November 2011
Time: 12.30-13.30
Place: NJ14 4-205

[BIZ] Business Interaction Zquad supports your cooperation with private companies in Nordjylland from the first day. All time spend on preparation, during meetings or in the aftermath will qualify for a 50% bonus on your time tracking record. If you want to apply for EU funding in cooperation with private companies (at least one of them from Nordjylland) all your activities right up to the day the funding is granted will qualify. When you are running a student course with with company visits or business guest speakers you will qualify and also when you are the supervisor for student groups cooperating with companies. And these activities are just a few examples.  [BIZ] already has hours allocated for you, so you do not have to do a lot of paperwork to get started, – an initial registration and a monthly statement of the hours used on the activities and that´s it. Come to this meeting and get all the details needed to get started.

Analyzing activities in sport arenas using thermal imagery -Thomas Moeslund

Date: 2 November 2011
Time: 12.30-13.30
Place: NJ14 3-228 (Las Vegas)

The talk will present our current activities where we are analyzing the occupancy of 10 sports arenas in Aalborg using a thermal camera. The technical heart of the system is based on a master thesis (by Rikke and Anders). First image processing is used to segment potential human objects. Next, these objects are analysed to figure out if they are noise, a single human or multiple humans grouped together. In the latter case, an un-grouping is performed to isolate individuals. Positions are mapped to the floor’s coordinate system and accumulated over time to give an average occupancy over time.

We have recently received funding to continue this work the next three years. The talk will therefore also present the ambition for the future. More info can be found here: http://www.create.aau.dk/bbh/