Technologie-Zentrum Informatik und Informationstechnik (TZI)
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Item-typ:Veröffentlichung, Robots, Pancakes, and Computer Games: Designing Serious Games for Robot Imitation LearningAutonomous manipulation robots can be valuable aids as interactive agents in the home, yet it has proven extremely difficult to program their behavior. Imitation learning uses data on human demonstrations to build behavioral models for robots. In order to cover a wide range of action strategies, data from many individuals is needed. Acquiring such large amounts of data can be a challenge. Tools for data capturing in this domain must thus implement a good user experience. We propose to use human computation games in order to gather data on human manual behavior. We demonstrate the idea with a strategy game that is operated via a natural user interface. A comparison between using the game for action execution and demonstrating actions in a virtual environment shows that people interact longer and have a better experience when playing the game.Konferenzbeitrag101 133 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, An Interactive-Shoe For Surgeons: Hand-Free Interaction With Medical 2D Data(2018-04-20); ; ; ; During interventions, surgeons often need to review medical imaging data, e.g., CT scans. Usually, surgeons need to rely on an assistant to browse the images because of sterility requirements. Communication with a substitute operator is tedious and error-prone if the operator does not have an equal level of professional experience and might interrupt the workflow. We present a sensor-integrated shoe allowing surgeons to browse and manipulate 2D medical image data by foot movement. It is portable and wearable. The shoe uses an optical sensor taken from an off-the-shelf computer mouse for tracking the foot movements and an additional micro-switch to turn it on or off. We evaluated the performance of the shoe interface against a control condition with assistant together with ten surgeons in an empirical user study. Our results provide first indications for the effectiveness of a shoe interface in this application area.Konferenzbeitrag124 144 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, Virtual Reality for User-Centered Design and Evaluation of Touch-free Interaction Techniques for Navigating Medical Images in the Operating Room(2017-05-06); ; ; ; Computer-assisted surgery has pervaded the operating room (OR). While display and imaging technologies advance rapidly, keyboard and mouse are still the dominant input devices, even though they cause sterility problems. We present an interactive virtual operating room (IVOR), intended as a tool to develop and study interaction methods for the OR, and two novel touch-free interaction techniques using hand and foot gestures. All was developed and evaluated with 20 surgeons. The results show that our techniques can be used with minimal learning time and no significant differences regarding completion time and usability compared to the control condition relying on verbal instruction of an assistant. Furthermore, IVOR as a tool was well received by the surgeons, although they had no prior experience with virtual reality. This confirms IVOR is an effective tool for user-centered design and evaluation, providing a portable, yet realistic substitution for a real OR for early evaluations.Konferenzbeitrag123 193 - Some of the metrics are blocked by yourconsent settings
Item-typ:Veröffentlichung, The Downgrading Axioms Challenge for Qualitative Composition of Food IngredientsQualitatively graded relations provide increased granularity for fine-grain modelling, and achieve qualitative abstraction from quantitative data. We focus on composite dosage for food ingredients in the BAALL Ontology (of considerable size): weight ratios, Alcohol By Volume, etc. To deduce the overall qualitative composition by reasoning, axioms for downgrading are introduced. These impose a heavy load on reasoning such that conventional reasoners fail.Konferenzbeitrag19 20