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检索条件"机构=Computer Vision for Human-Computer Interaction Lab"

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Manifold Alignment for Person Independent Appearance-Based Gaze Estimation

Manifold Alignment for Person Independent Appearance-Based G...

引用

International Conference on Pattern Recognition

作者： Timo Schneider Boris Schauerte Rainer Stiefelhagen Computer Vision for Human Computer Interaction Lab Karlsruhe Institute of Technology Germany

We show that dually supervised manifold embedding can improve the performance of machine learning based person-independent and thus calibration-free gaze estimation. For this purpose, we perform a manifold embedding for each person in the training dataset and then learn a linear transformation that aligns the individual, person-dependent manifolds. We evaluate the effect of manifold alignment on the recently presented Columbia dataset, where we analyze the influence on 6 regression methods and 8 feature variants. Using manifold alignment, we are able to improve the person-independent gaze estimation performance by up to 31.2 % compared to the best approach without manifold alignment.

关键词： Manifolds Estimation Training Principal component analysis Vectors Head Discrete cosine transforms

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The discovery of user related rare sequential patterns of topics in the Internet document stream 14

The discovery of user related rare sequential patterns of to...

引用

29th Annual ACM Symposium on Applied Computing, SAC 2014

作者： Hu, Zhongyi Wang, Hongan Zhu, Jiaqi Beijing Key Lab. of Human-Computer Interaction Institute of Software Chinese Academy of Sciences China

ISBN: (纸本)9781450324694

On the Internet, plain text documents created and viewed by users constitute ever changing document streams. Lots of the literature is devoted to topic modeling, while the sequential patterns of topics in document streams are ignored. In this paper, we deal with the problem of mining user related rare sequential patterns of topics in the Internet document streams, which can be used in many fields, such as real-time user behavioral monitoring on the Internet. We propose an approach to discover rare patterns based on the temporal and probabilistic information of topics. Experiments show that the proposed approach can discover user related rare patterns of topic effectively. Copyright 2014 ACM.

关键词： Data mining

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Designing a mobile persuasive application to encourage reduction of users' exposure to cell phone RF emissions

Designing a mobile persuasive application to encourage reduc...

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9th International Conference on Persuasive Technology, PERSUASIVE 2014

作者： Burigat, Stefano Chittaro, Luca Human-Computer Interaction Lab. Department of Mathematics and Computer Science University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9783319071268

The International Agency for Research on Cancer classifies radiofrequency (RF) electromagnetic emissions of cell phones as possibly carcinogenic to humans [1] and suggests the use of hands-free devices such as earphones to reduce direct exposure of the brain to such emissions. In this paper, we present the design of a mobile application that exploits persuasive principles to encourage the use of earphones during cell phone calls. We propose different notifications and visualizations aimed at informing the user about her behavior with respect to earphone use and discuss the results of a user study that was aimed at investigating aspects such as understandability, emotional impact, and perceived usefulness of the proposed solutions. Results of the study are used to inform the design of the application. To the best of our knowledge, this is the first investigation of persuasive technologies applied to the reduction of user's exposure to cell phone RF emissions. © 2014 Springer International Publishing.

关键词： Cellular telephones

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Designing alternative systems for local communities 33

Designing alternative systems for local communities

引用

33rd Annual CHI Conference on human Factors in Computing Systems, CHI EA 2015

作者： Vlachokyriakos, Vasilis Comber, Rob Crivellaro, Clara Taylor, Nick Kuznetsov, Stacey Kavanaugh, Andrea Le Dantec, Christopher A. Kim, B. Joon Culture Lab School of Computing Science Newcastle University United Kingdom Duncan of Jordanstone College of Art and Design University of Dundee United Kingdom School of Arts Media and Engineering Arizona State University PhoenixAZ United States Center for Human-Computer Interaction Virginia Tech BlacksburgVA United States School of Literature Media and Communication Georgia Institute of Technology AtlantaGA United States Seoul Korea Republic of

ISBN: (纸本)9781450331463

Alternative systems ranging from self-organized skill sharing to alternative micro-economies have been critical channels of community engagement and bonding. Technology is increasingly playing a role in the way people connect to these services at the (hyper)local level. While there has been considerable research on designing technology to support conventional, established systems of community organization and governance;mobile and ubiquitous technologies offer strong potential for alternative systems to be established in the local level. Do It Yourself (DIY) and maker movements are enabling grassroots activist groups to develop their own technologies or to hack existing tools to support bottom-up systems of self-organization, democracy and commerce. Based on these trends and the recent worldwide economic, political and societal crisis, this workshop will bring together researchers, practitioners and activists to re-envision how HCI tools can support alternative systems of local civic engagement.

关键词： human computer interaction

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Changing user's safety locus of control through persuasive play: An application to aviation safety

Changing user's safety locus of control through persuasive p...

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9th International Conference on Persuasive Technology, PERSUASIVE 2014

作者： Chittaro, Luca Human-Computer Interaction Lab. University of Udine via delle Scienze 206 33100 Udine Italy

ISBN: (纸本)9783319071268

Virtual risk experiences have been proposed in persuasive technology as an approach to change people's attitudes and behaviors concerning safety topics. This paper advances the investigation of virtual risk experiences in different directions. First, we extend the study of their effects to safety locus of control, which is an important predictor of an individual's attitudes and behaviors with respect to risky situations. Second, we explore a design that relies much more on play than previous virtual experiences of risks in the literature. Third, we extend the investigation of persuasive technology to a topic in aviation safety (i.e., assuming a proper brace position during an emergency landing) that has never been approached before with an interactive system and we analyze if a novel game-based approach can be effective in fostering awareness of this fundamental safety action. Our study shows that the proposed persuasive game produces noteworthy results in terms of learning safety knowledge and improves players' attitudes towards aircraft accidents, increasing their internal safety locus of control and decreasing the external one. © 2014 Springer International Publishing.

关键词： Aircraft accidents

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Machine-to-machine interaction based on remote 3D arm pointing using single RGBD camera

Machine-to-machine interaction based on remote 3D arm pointi...

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Advanced Technologies, Embedded and Multimedia for human-Centric Computing, humanCom and EMC 2013

作者： Shih, Huang-Chia Liu, En-Rui Human-Computer Interaction Multimedia Lab. Department of Electrical Engineering Yuan Ze University Taoyuan Taiwan

ISBN: (纸本)9789400772618

In this paper, we propose a prototype of machine-to-machine interaction system using a single RGBD camera. Based on the 3D arm pointing and tracking algorithm, system enables user to select multiple objects using their two arms, without infrared remote controller and wireless transmitter. A fast gesture recognition method is used to identify the instruction assignment for the target objects. The system consists of three modules, including image capturing module, 3D arm pointing and target tracking module, and interaction module. The image capture module use the RGBD camera installed behind of user to capture the arm parameters in real-world space. The pointing and tracking algorithm is referred to the environmental information to establish the master and slave objects. For interaction module, the command gesture is determined by the gesture recognition, interacting with target devices by the decoded instruction. Finally, system generates a control signal for triggering the master object to communicate with the slave object according to the fetched the instruction. © Springer Science+Business Media Dordrecht 2014.

关键词： human computer interaction

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Children’s Internet Search: Using Roles to Understand Children’s Search Behavior

引用

2014年

作者： Elizabeth Foss Allison Druin

ISBN: (数字)9781608454440

Searching the Internet and the ability to competently use search engines are increasingly becoming an important part of children’s daily lives. Whether mobile or at home, children use search interfaces to explore personal interests, complete academic assignments, and have social interaction. However, engaging with search also means engaging with an ever-changing and evolving search landscape. There are continual software updates, multiple devices used to search (e.g., phones, tablets), an increasing use of social media, and constantly updated Internet content. For young searchers, this can require infinite adaptability or mean being hopelessly confused. This book offers a perspective centered on children’s search experiences as a whole instead of thinking of search as a process with separate and potentially problematic steps. Reading the prior literature with a child-centered view of search reveals that children have been remarkably consistent over time as searchers, displaying the same search strategies regardless of the landscape of search. However, no research has synthesized these consistent patterns in children’s search across the literature, and only recently have these patterns been uncovered as distinct search roles, or searcher types. Based on a four-year longitudinal study on children’s search experiences, this book weaves together the disparate evidence in the literature through the use of 9 search roles for children ages 7-15. The search role framework has a distinct advantage because it encourages adult stakeholders to design children’s search tools to support and educate children at their existing levels of search strength and deficit, rather than expecting children to adapt to a transient search landscape.

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AskSheet: Efficient human computation for decision making with spreadsheets 14

AskSheet: Efficient human computation for decision making wi...

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17th ACM Conference on computer Supported Cooperative Work and Social Computing, CSCW 2014

作者： Quinn, Alexander J. Bederson, Benjamin B. University of Maryland College Park Human-Computer Interaction Lab United States Computer Science United States Institute for Advanced Computer Studies College Park MD 20740 United States

ISBN: (纸本)9781450325400

The wealth of resources online has empowered individuals and businesses with an unprecedented volume of information to aid in decision making processes. However, finding the many details needed for a non-trivial decision can be very labor-intensive. We present AskSheet, a general system that leverages human computation to acquire the inputs to an arbitrary decision spreadsheet provided by the user. The key innovation is the ability to prioritize the inputs by analyzing the user's spreadsheet formulas to calculate value of information for each of the blanks. By directing workers to find the details that impact the end result most, it results in a conclusive decision without gathering all of the inputs. Copyright © 2014 ACM.

关键词： Spreadsheets

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Experimence: Considerations for composing a rock song for interactive audience participation 40

Experimence: Considerations for composing a rock song for in...

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40th International computer Music Conference, ICMC 2014, Joint with the 11th Sound and Music Computing Conference, SMC 2014 - Music Technology Meets Philosophy: From Digital Echos to Virtual Ethos

作者： Hödl, Oliver Fitzpatrick, Geraldine Holland, Simon Human-Computer Interaction Group Vienna University of Technology Austria Music Computing Lab Open University United Kingdom

ISBN: (纸本)9789604661374

In popular music genres, typical songs are pre-composed and leave little or no space for improvisation during a live performance. That applies for the performing musicians as well as for the spectators in terms of interactive audience participation. In this study we question these improvisational limits and try to identify strategies for involving the audience as an additional and unpredictable factor in a pre-composed rock song. To do so we composed "Experimence" guided by the standard practice of song writing. The song was premiered at a public live concert where the audience could collaboratively participate in real-time by playing with a balloon together throughout the song. Using a wizard of oz technique, the movements of the balloon influenced the live music played by the pianist. We reflect across this experience and present notable issues raised during the composition, rehearsals and the actual performance. We then classify these aspects as abstract variables of consideration for a composition meant to promote such audience participation. We propose this proof of concept as a starting point for further discussion, suggesting that a song such as Experimence can be a unique and individual piece of music every time it is played although largely pre-composed. Copyright: © 2014 Oliver Hödl et al.

关键词： Balloons

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KINECT UNBIASED

KINECT UNBIASED

引用

IEEE International Conference on Image Processing

作者： Manuel Martinez Rainer Stiefelhagen Karlsruhe Institute of Technology Institute for Anthropomatics and Robotics (IAR) Computer Vision for Human-Computer Interaction Lab

ISBN: (纸本)9781479957521

Since its release, Kinect has been the de facto standard for low-cost RGB-D sensors. An infrared laser ray shot through an holographic diffraction grating projects a fixed dot pattern which is captured using an infrared camera. The pseudo-random pattern ensures that a simple block matching algorithm suffices to provide reliable depth estimates, allowing a cost-effective implementation. In this paper, we analyze the software limitations of Kinect's method, which allows us to propose algorithms that provide better precision. First, we analyze the dot pattern: we measure its pincushion distortion and its effect on the dot density, which is smaller towards the edges of the image. Then, we analyze the behavior of Block Matching algorithms, we show how Kinect's Block Matching implementation is;in general;limited by the dot density of the pattern, and a significant spatial bias is introduced as a result. We propose an efficient approach to estimate the disparity of each dot, allowing us to produce a point cloud with better spatial resolution than Block Matching algorithms.

关键词： Kinect RGB-D Pattern Bias

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