Logo des Repositoriums

Auflistung nach Schlagwort "mobile devices"

1 - 6 von 6
  • Konferenzbeitrag
    Case study of the acquisition of contactless fingerprints in a real police setting
    (BIOSIG 2022, 2022) Axel Weissenfeld, Reinhard Schmid
    Biometric recognition systems integrated into mobile devices have gained acceptance during recent years. Developments in fingerprint acquisition technology have resulted in touchless mobile devices that acquire high quality fingerprints. While authorities are particular interested on mobile solutions, they have databases containing fingerprint data mainly acquired using contactbased devices. Therefore, they are interested in the accuracy of cross-sensor fingerprint recognition. We present a case study of a comprehensive matching comparison on real fingerprint data acquired by national police officers. The objective of this study is: (i) to analyse the feasibility when comparing data acquired using a typical contact-based fingerprint device against data acquired using a new contactless device, and (ii) the feedback of the end user (i.e. national police officers) regarding the acquisition process. Obtained results are promising and the current prototype shows its feasibility for operational police use. The end users expressed their satisfaction with the developed prototype and they suggested extra functionalities towards a practical solution for police officers.
  • Workshopbeitrag
    CodingDojo: Interactive Slides with Real-time Feedback
    (Mensch & Computer 2012 – Workshopband: interaktiv informiert – allgegenwärtig und allumfassend!?, 2012) Raab, Felix; Fuchs, Markus; Wolff, Christian
    We present "CodingDojo", a presentation platform with interactive tools and real-time feedback elements that are controlled by a smartphone to be used in typical academic teaching contexts. The system provides tools for source code presentation, discussion and different types of coding challenges. CodingDojo was evaluated in a University course about good coding practices where traditional presentation platforms would be limited in functionality. We received positive user experience rankings and feedback from participants, suggesting that the system should be further developed and tested in other courses.
  • Zeitschriftenartikel
    Elektronisches Papier — Displaytechnologie mit weitem Anwendungsspektrum
    (Wirtschaftsinformatik: Vol. 44, No. 6, 2002) Schryen, Guido; Karla, Jürgen
    Electronic paper is a new material-technological stream in display research: electronic paper consists of a thin, flexible plastic film within which charged particles are aligned due to electric fields. Advantages over traditional technologies like LCD displays include lower production costs (lower process costs as well as lower material costs) and lower weight. Furthermore a better readability emerges because of better reflection, contrast, and larger viewing angles. This potential can be tapped for display panels, computer displays, and mobile devices. Almost every material can be used as substrate, hence flexible ones can be used as media for newspapers and journals. The leading US companies E Ink and Gyricon Media offer an increasingly broader range of products based on electronic paper.
  • Konferenzbeitrag
    IDIAR: Augmented Reality Dashboards to Supervise Mobile Intervention Studies
    (Mensch und Computer 2021 - Tagungsband, 2021) Vock, Katja; Hubenschmid, Sebastian; Zagermann, Johannes; Butscher, Simon; Reiterer, Harald
    Mobile intervention studies employ mobile devices to observe participants’ behavior change over several weeks. Researchers regularly monitor high-dimensional data streams to ensure data quality and prevent data loss (e.g., missing engagement or malfunctions). The multitude of problem sources hampers possible automated detection of such irregularities – providing a use case for interactive dashboards. With the advent of untethered head-mounted AR devices, these dashboards can be placed anywhere in the user’s physical environment, leveraging the available space and allowing for flexible information arrangement and natural navigation. In this work, we present the user-centered design and the evaluation of IDIAR: I nteractive Dashboards in AR, combining a headmounted display with the familiar interaction of a smartphone. A user study with 15 domain experts for mobile intervention studies shows that participants appreciated the multimodal interaction approach. Based on our findings, we provide implications for research and design of interactive dashboards in AR.
  • Konferenzbeitrag
    MobiBits: Multimodal Mobile Biometric Database
    (BIOSIG 2018 - Proceedings of the 17th International Conference of the Biometrics Special Interest Group, 2018) Bartuzi, Ewelina; Roszczewska, Katarzyna; Trokielewicz, Mateusz; Białobrzeski, Radosław
    This paper presents a novel database comprising representations of five different biometric characteristics, collected in a mobile, unconstrained or semi-constrained setting with three different mobile devices, including characteristics previously unavailable in existing datasets, namely hand images, thermal hand images, and thermal face images, all acquired with a mobile, off-the-shelf device. In addition to this collection of data we perform an extensive set of experiments providing insight on benchmark recognition performance that can be achieved with these data, carried out with existing commercial and academic biometric solutions. This is the first known to us mobile biometric database introducing samples of biometric traits such as thermal hand images and thermal face images. We hope that this contribution will make a valuable addition to the already existing databases and enable new experiments and studies in the field of mobile authentication. The MobiBits database is made publicly available to the research community at no cost for non-commercial purposes.
  • Textdokument
    Using Eye Tracking in Usability Testing of Mobile Interfaces
    (Tagungsband UP12, 2012) Rösler, Alexander
    Until today, eye tracking has not played a major role in usability evaluations of mobile interfaces. Traditional eye tracking hardware has not been able to deliver the high resolution video and accurate gaze data that is required for studying mobile device graphic interfaces. Recently, more sophisticated eye tracking systems have become available which are supposed to provide more robust and accurate platforms for conducting eye tracking studies on mobile interfaces. This paper introduces two different solutions that can be used in eye tracking studies of mobile interfaces and discusses what to look out for during planning, conducting a study and analyzing the collected gaze data.