Clemens Holzmann

ORCID: 0000-0002-9811-115X
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About
Contact & Profiles
Research Areas
  • Virtual Reality Applications and Impacts
  • Context-Aware Activity Recognition Systems
  • Human-Automation Interaction and Safety
  • Augmented Reality Applications
  • Usability and User Interface Design
  • Interactive and Immersive Displays
  • Innovative Human-Technology Interaction
  • Data Management and Algorithms
  • Constraint Satisfaction and Optimization
  • Semantic Web and Ontologies
  • Data Visualization and Analytics
  • Gaze Tracking and Assistive Technology
  • Geographic Information Systems Studies
  • Autonomous Vehicle Technology and Safety
  • Green IT and Sustainability
  • Technology Use by Older Adults
  • Anomaly Detection Techniques and Applications
  • Hand Gesture Recognition Systems
  • Advanced Malware Detection Techniques
  • Modular Robots and Swarm Intelligence
  • Energy Efficient Wireless Sensor Networks
  • Advanced Image and Video Retrieval Techniques
  • Mobile Crowdsensing and Crowdsourcing
  • Tactile and Sensory Interactions
  • Muscle activation and electromyography studies

University of Applied Sciences Upper Austria
2013-2022

Software Competence Center Hagenberg (Austria)
2021

Johannes Kepler University of Linz
2004-2010

University of Passau
2009

We deployed 72 sensors of 10 modalities in 15 wireless and wired networked sensor systems the environment, objects, on body to create a sensor-rich environment for machine recognition human activities. acquired data from 12 subjects performing morning activities, yielding over 25 hours data. report number activity occurrences observed during post-processing, estimate that 13000 14000 object interactions occurred. describe setup methodology acquisition, synchronization curation. challenges...

10.1109/inss.2010.5573462 article EN 2010-06-01

Abstract Cross‐virtuality analytics (XVA) is a novel field of research within immersive and visual analytics. A broad range heterogeneous devices across the reality–virtuality continuum, along with respective metaphors analysis techniques, are currently becoming available. The goal XVA to enable that use transitional collaborative interfaces seamlessly integrate different support multiple users. In this work, we take closer look at analyse existing body work for an overview its current...

10.1111/cgf.14447 article EN cc-by-nc Computer Graphics Forum 2022-02-01

Opportunistic sensing allows to efficiently collect information about the physical world and persons behaving in it. This may mainstream human context activity recognition wearable pervasive computing by removing requirements for a specific deployed infrastructure. In this paper we introduce newly started European research project OPPORTUNITY within which develop mobile opportunistic systems. We outline project's objective, approach follow along sensing, data processing interpretation,...

10.1109/wowmom.2009.5282442 article EN 2009-06-01

The evaluation of mobile user interfaces can be a tedious task, especially if usability tests under real-world conditions should performed. In particular, the high-fidelity prototypes provides valuable measures about quality applications, which helps designers to identify potentials improvement for next revision. Due their costs or missing expert knowledge techniques such as cognitive walkthroughs heuristic are often not used. Additionally, commercial frameworks provide insufficient details...

10.1145/2428955.2428983 article EN 2012-01-01

A crucial part of the design mobile user interfaces is their evaluation with users. Although studies are widely used for measuring usability a software system, they time-consuming and expensive. In this study, we propose novel approach which based on computational analysis an app's visual appearance. By calculating metrics measure complexity interface, it should be possible to draw conclusions about perceived usability. Automating practice would beneficial developers designers, as help find...

10.1093/iwc/iwy008 article EN Interacting with Computers 2018-03-20

Abstract Increasing vehicle automation presents challenges as drivers of highly automated vehicles become more disengaged from the primary driving task. However, even with fully driving, there will still be activities that require interfaces for vehicle-passenger interactions. Windshield displays are a technology promising potential they able to provide large content areas supporting in non-driving related activities. it is unknown how or passengers would use these displays. This work...

10.1515/icom-2018-0033 article EN i-com 2019-08-01

With the increasing knowledge advancements and availability of mixed reality (MR), number its purposes applications in vehicles rises. Mixed may help to increase road safety, support more immersive (non-) driving related activities, finally enhance passenger experience. MR also be enabling technology trust acceptance automated therefore on transition towards driving. Further, extends use cases virtual other technologies. However, there are still a challenges with when applied vehicles,...

10.1145/3428361.3428390 article EN 2020-11-22

Computer stereo vision is an important technique for robotic navigation and other mobile scenarios where depth perception needed, but it usually requires two cameras with a known horizontal displacement. In this paper, we present solution devices just one camera, which first step towards making computer available to wide range of that are not equipped cameras. We have built prototype using state-of-the-art phone, has be manually displaced in order record images from different lines sight....

10.1109/icdcsw.2012.22 article EN 2012-06-01

Windshield displays are a promising technology for automotive applications. They easily allow to augment the capabilities of drivers or display content relevant non-driving related activities. However, little information is available on how potential users would utilize these displays. In this paper we present results user study (N=31) addressing preferences windshield in automated driving. Our goal was find out like applications appear terms size, position, and type. Participants could...

10.1145/3205873.3205885 article EN 2018-05-23

In this paper, we present an implemented system for supporting group interaction in mobile distributed computing environments. First, introduction to context and a motivation using contextual information facilitate is given. We then the architecture of our system, which consists two parts: subsystem location sensing that acquires about users as well spatial proximities between them, one actual context-aware application, provides services interaction.

10.1145/1023783.1023801 article EN 2004-10-01

Nowadays, HCI Research on automated driving is commonly carried out using either low-quality setups with 2D monitors or expensive simulators motion platforms. Furthermore, software for user studies often and hard to modify different scenarios. We plan fill this gap by proposing a low-cost, high-fidelity immersive prototyping simulator making use of virtual reality (VR) technology: AutoWSD - Automated research windshield displays. showcase hybrid hardware solution as well demonstrate how...

10.1145/3349263.3349595 article EN 2019-09-19

With increasing automation, vehicles could soon become mobile work- and living spaces, but traditional user interfaces (UIs) are not designed for this domain. We argue that high levels of productivity experience will only be achieved in SAE L3 automated if UIs modified non-driving related tasks. As controls might far away (up to 2 meters), we suggest use gaze-based interaction with windshield displays. In work, investigate the effect different dwell times feedback designs (circular linear...

10.1145/3409120.3410654 article EN 2020-09-14

Human factors research in automated driving is nowadays often conducted using either low-quality setups such as 2D monitors or highly expensive simulators with motion platforms. Additionally, software for scenarios and hard to modify different scenarios. We intend bridge this gap by proposing a low-cost, high-fidelity immersive prototyping solution utilizing the recent advances development of virtual reality (VR): AutoWSD - Automated simulator on windshield displays. showcase hybrid hardware...

10.1145/3340764.3345366 article EN Proceedings of Mensch und Computer 2019 2019-09-08

Increasing vehicle automation presents challenges as drivers of automated vehicles become more disengaged from the primary driving task, there will still be activities that require interfaces for vehicle-passenger interactions. Windshield displays provide large-content areas supporting in non-driving related tasks. This work addresses user preferences well task and safety aspects 3D augmented reality (AR) windshield driving. Participants a study (N = 24) were presented with two modes content...

10.1109/vr51125.2022.00074 article EN 2020 IEEE Conference on Virtual Reality and 3D User Interfaces (VR) 2022-03-01

Windshield displays (WSDs) are a promising new technology to augment the entire windscreen with additional information about vehicle state, highlight critical objects in surrounding, or use screen as replacement for conventional display. Typically, augmentation is provided screen-fixed manner overlay on windscreen. However, it unclear date if this optimal terms of usability/UX and further there no golden standard suggesting where place how manage content such large vehicular environment. In...

10.1145/3428361.3428405 article EN 2020-11-22

Heat maps are an important usability tool for visualising eye gaze data, mouse movement or click interaction on web pages. Regarding mobile applications however, use cases heat still limited. For example, tracking is difficult to realise due limitations imposed by mobility hardware requirements. Moreover, understanding multi-touch have not been used as a yet. In this paper we present concept generate finger-based interaction. Our goal provide applications, which can be in studies with huge...

10.1145/2406367.2406427 article EN 2012-12-04

Identifying intentions of users when they launch an application on their smartphone, and understanding which tasks actually execute, is a key problem in mobile usability analysis. First, knowing execute required for calculating common metrics such as task efficiency, error rates effectiveness. Second, how perform these important developers order to validate designed interaction sequences (e.g. sequential steps successfully complete task). In this paper, we describe novel approach...

10.1145/2628363.2628384 article EN 2014-09-23

Currently, there is a lack of possibilities to quantify the complexity mobile user interfaces with metrics. User studies for evaluating experience are costly and time consuming, but no tools available automate this process. A tool automatically calculating metrics would make quantifiable thus allow easily comparing different versions an application or apps among each other. We started developing service Android OS calculate interface In paper, we present our approach describe how implemented.

10.1145/2836041.2841214 article EN 2015-11-30
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