Auflistung nach Autor:in "Zeng, Limin"
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- Workshopbeitrag3DOD: A haptic 3D Obstacle Detector for the Blind(Mensch & Computer 2012 – Workshopband: interaktiv informiert – allgegenwärtig und allumfassend!?, 2012) Zeng, Limin; Weber, GerhardIn this article, we propose a haptic 3D obstacle detector for the blind, which combines an off-the-shelf 3D Time-of-Flight (ToF) camera and a novel 2D tactile display. The system detects objects in up to 7 meters, and renders the spatial layout of obstacles in a non-visual interface, allowing users to choose a route independently to avoid varied obstacles, including hanging obstacles.
- KonferenzbeitragA Survey: Outdoor Mobility Experiences by the Visually Impaired(Mensch und Computer 2015 – Workshopband, 2015) Zeng, Limin
- KonferenzbeitragAccessible Interaction for Visually Impaired People(Mensch und Computer 2015 – Workshopband, 2015) Joisten, Martina; Zeng, Limin; Woletz, Julie; Brock, Anke; Avila, Mauro
- KonferenzbeitragCOACH: Collaborative Accessibility Approach in Mobile Navigation System for the Visually Impaired(Workshop Gemeinschaften in Neuen Medien (GeNeMe) 2010, 2010) Zeng, Limin; Weber, GerhardDue to the shortage of geographical information suitable for the visually impaired, the current navigation systems fail to provide high quality performance. The results of an international survey on the user needs are discussed in this article. A collaborative accessibility approach (COACH) is proposed to not only extend accessible geo-information, but also offer an opportunity to share experiences among peers. Related topics are addressed, like map data, multimodal annotation, and privacy.
- KonferenzbeitragEvaluation of Users‘ Effort in a Human-computer Cooperation based Indoor Mobile Location System(Mensch und Computer 2018 - Tagungsband, 2018) Zeng, Limin; Noeres, Tino; Weber, GerhardDue to the utilization of existing infrastructure and powerful mobile devices, many different indoor localization systems have been booming in recent years. However, most of those systems very focus on technical issues, a few studies investigate usability issues from users’ perspective. In this paper, we conduct a case study with 18 participants to study how many effort (e.g., physical and mental workload) users would spend in a human-computer cooper-ation indoor positioning system. To support the study, we develop a Google Tango tablet based infrastructure-free indoor positioning system, by mapping users’ walking trajectory and environmental features. Through the evaluation, we confirm that the workload increas-es as the increase of required walking distance, specifically for the physical and temporal demands. While positioning in an infrastructure-free environment, the participants were willing to contribute and would walk maximum 50 meters with their mobile devices.
- ZeitschriftenartikelGeoCoach: A cross-device hypermedia system to assist visually impaired people to gain environmental accessibility(Informatik Spektrum: Vol. 40, No. 6, 2017) Zeng, Limin; Weber, GerhardBenefiting from today’s global positioning sys- tems (GPS) and geographic information systems (GIS), visually impaired individuals are able to travel more independently than before. How- ever, due to a lack of accessibility information about geographic features, those navigation sys- tems fail to satisfy their special requirements. To help visually impaired people access and share environmental accessibility information in cities ubiquitously, this paper presents a collaborative and cross-device hypermedia system, namely GeoCoach. In addition to desktop computers, visually impaired people are able to access envi- ronmental accessibility on a pin-arrayed display and on mobile phones. The two user studies conducted with visually impaired users indicate that the proposed system was effective.
- WorkshopbeitragHaptic Human-Robot Interfaces on Guide Robots for Visually Impaired People(Mensch und Computer 2018 - Workshopband, 2018) Zeng, Limin; Pitkin, Alexander; Einert, BjörnIn this paper, we presents two different haptic and intelligent guide robots for people with visual impairments. One guide robot has a haptic rein which would sense and interactive with users’ grasp force, while the other one does not have a haptic rein, but equipped with a wireless tactile belt to receive navigation instructions.