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arXiv 2017年

作者： Oh, Seong Joon Benenson, Rodrigo Fritz, Mario Schiele, Bernt Computer Vision and Multimodal Computing Group Max Planck Institute for Informatics Saarbrücken Germany

People nowadays share large parts of their personal lives through social media. Being able to automatically recognise people in personal photos may greatly enhance user convenience by easing photo album organisation. For human identification task, however, traditional focus of computer vision has been face recognition and pedestrian re-identification. Person recognition in social media photos sets new challenges for computer vision, including non-cooperative subjects (e.g. backward viewpoints, unusual poses) and great changes in appearance. To tackle this problem, we build a simple person recognition framework that leverages convnet features from multiple image regions (head, body, etc.). We propose new recognition scenarios that focus on the time and appearance gap between training and testing samples. We present an in-depth analysis of the importance of different features according to time and viewpoint generalisability. In the process, we verify that our simple approach achieves the state of the art result on the PIPA [1] benchmark, arguably the largest social media based benchmark for person recognition to date with diverse poses, viewpoints, social groups, and events. Compared the conference version of the paper [2], this paper additionally presents (1) analysis of a face recogniser (DeepID2+ [3]), (2) new method naeil2 that combines the conference version method naeil and DeepID2+ to achieve state of the art results even compared to post-conference works, (3) discussion of related work since the conference version, (4) additional analysis including the head viewpoint-wise breakdown of performance, and (5) results on the open-world setup. Copyright © 2017, The Authors. All rights reserved.

关键词： Social networking (online)

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Learner-content-interface as an approach for self-reliant and student-centered learning 12

Learner-content-interface as an approach for self-reliant an...

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12th International Conference on Cognition and Exploratory Learning in the Digital Age, CELDA 2015

作者： Nicolay, Robin Schwennigcke, Bastian Sahl, Sarah Martens, Alke Department of Information and Communication Services Institute of Computer Science University of Rostock Germany Research Group Communication and Difference Department of Humanities University of Rostock Germany Department of Practical Informatics Institute of Computer Science University of Rostock Germany

ISBN: (纸本)9789898533432

Conceptualization and implementation of computer supported teaching and training is currently not tailored to the paradigm of learner centration. Many technical solutions lack transparency and consistency regarding the supported learner activities. An insight into learners activities correlated to learning tasks is needed. In this paper we outline recent developments in university's higher education concepts. We introduce InterLect as a tool to observe student's activities in lecture content acquisition and describe first insights and questions derived using this tool in a lecture scenario. Based on a new understanding of activity transformation cycles, an elaborated didactical design is modeled, which allows to address and observe learning activities. Ideas for a valid evaluation process are derived in order to investigate efficiency of the digital tool within the didactical framework.

关键词： Digital devices

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On an LQ control problem anomaly and a possible solution

On an LQ control problem anomaly and a possible solution

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IASTED International Conference on Control and Applications, CA 2012

作者： Keviczky, László Bokor, József Computer and Automation Research Institute of the Hungarian Academy of Sciences Control Engineering Research Group of the HAS Department of Automation and Applied Informatics Kende u 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9780889869226

The specific relationships between the classical pole-placement state feedback, the RICCATI equation based LQ paradigm and the KALMAN frequency domain approach are discussed. It is shown that arbitrary pole placement is not possible by standard LQ optimality. A possible solution of this anomaly is to use more general LQ criterion with specific weights on the state, input and crossterm.

关键词： State feedback

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Combining language sources and robust semantic relatedness for attribute-based knowledge transfer

Combining language sources and robust semantic relatedness f...

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11th European Conference on computer vision, ECCV 2010

作者： Rohrbach, Marcus Stark, Michael Szarvas, György Schiele, Bernt Department of Computer Science TU Darmstadt Germany Max Planck Institute for Informatics Saarbrücken Germany Research Group on Artificial Intelligence Hungarian Academy of Sciences Hungary

Knowledge transfer between object classes has been identified as an important tool for scalable recognition. However, determining which knowledge to transfer where remains a key challenge. While most approaches employ varying levels of human supervision, we follow the idea of mining linguistic knowledge bases to automatically infer transferable knowledge. In contrast to previous work, we explicitly aim to design robust semantic relatedness measures and to combine different language sources for attribute-based knowledge transfer. On the challenging Animals with Attributes (AwA) data set, we report largely improved attribute-based zero-shot object class recognition performance that matches the performance of human supervision. © 2012 Springer-Verlag.

关键词： Semantics

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A team study of the IEEE 802.16 collision resolution protocol

A team study of the IEEE 802.16 collision resolution protoco...

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2010 IFIP Wireless Days, WD 2010

作者： Karouit, Abdelillah Haqiq, Abdelkrim Barbosa, Luis Orozco Mathematics and Computer Science Department Settat Morocco E-NGN Research Group Africa and Middle East Hassan 1 University Morocco Albacete Research Institute of Informatics 02071 Albacete Spain

ISBN: (纸本)9781424492299

In this paper, we study the collision resolution protocol of the IEEE 802.16 standard for metropolitan broadband wireless access systems. The standard specifies the use of a random access scheme based on the slotted binary exponential backoff (BEB) algorithm during the bandwidth request phase. We follow a team problem approach towards the analysis of the throughput and the delay during the bandwidth reservation process. A Markov chain analysis is used to obtain the optimal retransmission probabilities, the optimal value of the initial back off window size, Wmin, maximizing the throughput and the expected delays experienced by a subscriber station (SS) when placing its bandwidth requests. © 2010 IEEE.

关键词： Bandwidth

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Optimization of the modeling loss contributing to the sensitivity function

Optimization of the modeling loss contributing to the sensit...

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IASTED International Conference on Control and Applications, CA 2012

作者： Bányász, Csilla Keviczky, László Computer and Automation Research Institute of the Hungarian Academy of Sciences Control Engineering Research Group of the HAS Department of Automation and Applied Informatics Kende u 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9780889869226

The control error in a generic two-degree of freedom (TDOF) control system can be decomposed into three major parts: design-, realizability- and modeling-loss. This new decomposition opens useful ways for practical optimization of TDOF systems and helps the construction of new algorithms for robust identification and control. The paper investigates the optimality of the third term.

关键词： Degrees of freedom (mechanics)

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Bilinear interpolation on a virtual hexagonal structure

Bilinear interpolation on a virtual hexagonal structure

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4th International Conference on Information Technology and Applications, ICITA 2007

作者： He, Xiangjian Li, Jianmin Hur, Namho IEEE Computer Vision Research Group University of Technology Sydney PO Box 123 Broadway NSW 2007 Australia School of Computer and Mathematics Fuzhou University Fujian 320002 China Digital Broadcasting Research Division Electronic and Telecommunications Research Institute Korea Republic of

ISBN: (纸本)0980326702

Spiral Architecture (SA) is a relatively new and powerful approach to machine vision system. The geometrical arrangement of pixels on SA can be described as a collection of hexagonal pixels. However, all the existing hardware for capturing image and for displaying image are produced based on rectangular architecture. Therefore, it becomes important to find a proper software approach to mimic SA so that images represented on the traditional square structure can be smoothly converted from or to the images on SA. For accurate image processing, it is critical to best maintain the image resolution during the image conversion. In this paper, we present an algorithm for bilinear interpolation of pixel values on a simulated SA. Our experimental results show that the bilinear interpolation improves the image representation accuracy while keeping the computation simple.

关键词： computer vision

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Tool-supported analysis of clinical processes

Tool-supported analysis of clinical processes

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4th IASTED International Conference on Biomedical Engineering

作者： Chimiak-Opoka, Joanna Giesinger, Gunnar Breu, Ruth Saboor, Samrend Ammenwerth, Elske Quality Engineering Research Group Institute for Computer Science University of Innsbruck Innsbruck Austria Institute for Health Information Systems University for Health Science Medical Informatics and Technology Hall Tirol Austria

ISBN: (纸本)0889865787

The main goal of this paper is to describe the technical aspects of our generic approach for domain-specific model analysis. Our framework supports checks and information retrieval for a set of models which may be based on different notations and tools. Such a modelling scenario is typical for the analysis of clinical processes, where techniques of process modelling (e.g. Aris) are combined with techniques of IT-landscape modelling (e.g. using the 3LGM). All elements defined and used in the models under consideration are saved in a common repository based on a common meta model. The method supports the user during the modelling and the analysis phase. Support for the latter is achieved by providing aggregated information on model elements based on queries and views, which can be considered as model cross sections corresponding to given aspects. We present an architecture, a prototypical realization and the technologies used in our implementation. The architecture is modular, used technologies and software are open, thus the tool is easy to extend.

关键词： Noninvasive medical procedures

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Semantically rich 3D documentation for the preservation of tangible heritage

Semantically rich 3D documentation for the preservation of t...

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13th International Symposium on Virtual Reality, Archaeology, and Cultural Heritage, VAST 2012 - 10th EUROGRAPHICS Workshop on Graphics and Cultural Heritage

作者： Echavarria, Karina Rodriguez Theodoridou, Maria Georgis, Christos Arnold, David Doerr, Martin Stork, Andre Serna, Sebastian Peña Cultural Informatics Research Group University of Brighton United Kingdom Institute of Computer Science Greece Fraunhofer IGD Germany TU Darmstadt Germany

ISBN: (纸本)9783905674392

Traditionally, 3D acquisition technologies have been used to record heritage artefacts and to support specific tasks such as conservation or provenance verification. These exercises are usually a one-off as the technology and resources required are cost intensive. However, there is a recent impetus on the creation of 3D collections to document heritage artefacts which are semantically enriched by using annotations. A requirement of these solutions is the ability to support several representations of a heritage artefact recorded through time. This paper will propose an infrastructure to systematically enrich 3D shapes in a collection by using propagated annotations. In addition, it will describe the mechanisms for annotating, propagating and structuring the annotations using the CIDOC-CRM ontology. The results of this research have the potential to support heritage organisations in making their semantically rich 3D content available to a wider audience of professionals. © The Eurographics Association 2012.

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Conditional IMS Learning Design Generation using User Modeling and Planning Techniques

Conditional IMS Learning Design Generation using User Modeli...

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IEEE International Conference on Advanced Learning Technologies

作者： Hernandez, Jorge Baldiris, Silvia Santos, Olga C. Fabregat, Ramon Boticario, Jesus G. System Engineering Program Corporación Universitaria de la Costa Colombia Institute of Informatics and Aplications (IIiA) Universidad de Girona Spain ADeNu Research Group Artificial Intelligence Department Computer Science School Spain

ISBN: (纸本)9781424444823

Active modeling is required in learning settings to cope with the dynamic evolution of the knowledge, since learners competences evolves over time as they participate in the course activities. Moreover, one of the main issues in a competence based eLearning process is to deliver personalized instructional designs adjusted to both 1) intrinsic characteristics of users (i.e. learning styles) and 2) the desired and achieved competences in the learning process (i.e. specific and generic competences). This delivery includes the adaptation of the content and the activities in a learning scenario based on a dynamic user model that evolves according to user interactions. In this paper, an approach to support Conditional Plans Generation (IMS Learning Designs) in the context of a virtual learning environment is presented The process is supported by a pervasive usage of standards and specifications (IMS family of specifications) in conjunction with an integral user modeling.

关键词： Specifications

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