Johannes Luderschmidt

Johannes Luderschmidt
RheinMain University of Applied Sciences · Department of Applied Computer Science

Prof. Dr.

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44
Publications
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85
Citations

Publications

Publications (44)
Conference Paper
Full-text available
Interactive surfaces (IS) like digital tabletop systems offer a cornucopia of input possibilities like touch gestures or interaction with physical objects. Additionally, multiple users can interact simultaneously allowing for a collaborative setting. These aspects have increased the complexity of designing such interfaces as compared to WIMP interf...
Conference Paper
Full-text available
Multi-touch and tangible input paradigms provide new opportunities for post-WIMP (Windows, Icons, Menus, Pointer) user interfaces. The development of such novel interfaces challenges designers and software developers alike. TUIO AS3 addresses these chal- lenges by providing a toolkit for the rapid development of multi-touch and tangible user interf...
Conference Paper
Full-text available
Vispol (Visualization for the police) is an interactive graph-based visualization that supports the work of the police of Hessen, Germany. A Vispol graph visualizes involved persons and their relations in crisis incidents like hostage takings or bank hold-ups. It presents a tabletop-based multi-touch and tangible user interface for the structured c...
Chapter
This work provides an approach to monitoring the activities of people with dementia. Classification of daily activities helps automate caregivers’ documentation of activities and can provide information about disease progression and disease-related changes. The prototype developed combines smartwatch technology with a neural network to classify act...
Conference Paper
By monitoring movements and activities, the progression of neurological diseases can be detected. The documentation required for this is associated with a high level of effort, which is hardly possible in view of the increasing shortage of nursing staff. In order to gradually relieve the nursing staff, we are developing an approach to automate docu...
Article
Full-text available
Many German cities, municipalities and transport associations are expanding their bike-sharing systems (BSS) to offer citizens a cost-effective and climate-friendly means of transport and an alternative to private motorized transport (PMT). However, operators face the challenge of generating high-quality predictive analyses and time series forecast...
Article
When monitoring the health state of people with neurological diseases, it is crucial to detect disease progression and disease-related changes as soon as possible. Such changes can be detected in the performance of everyday activities like eating, drinking, nose blowing, reading, looking at photos, knitting, telephoning, or brushing hair. In order...
Chapter
Especially in the healthcare system, there is a lot of potential to use wearables to create an even more efficient way to care for patients and have important data available at all times. Wearables, for example, could allow nurses to spend more time with their patients instead of spending their time collecting data and performing other technical ta...
Chapter
The aim of this work is to gain knowledge about finding, providing, and classifying interaction and health data during the course of disease of people suffering from dementia. In the following, we present a prototype that records interaction data of dementia patients using the smartwatch “Apple Watch Series 6” and that uses a recurrent neural netwo...
Conference Paper
In this paper, we compare the prediction accuracy of a deep learning model and three classification algorithms on very similar motions in the field of dementia diagnostics.The basic aim is to gain insights into the retrieval, provision and classification of interaction and health data in the course of the disease of dementia patients. This work sho...
Conference Paper
Im Rahmen des Projekts “Digitales Lehren und Lernen in Hessen” (DigLL) wurde vom Arbeitskreis AR/VR eine umfangreiche Recherche und Kategorisierung von AR und VR Software für Anwendungen in der Lehre ausgeführt, deren Ergebnis ein frei verfügbarer Online-Katalog ist. Zunächst wurden 308 Projekte gesichtet, hierbei wurden Projekte aus Hessen und dem...
Chapter
Since all systems and services are ultimately aimed at human users, it is essential to address the interaction between humans and machines. A disproportionately growing number of care recipients and the associated avalanche of data in all areas of modern care continuously increases the need for more efficient, higher-quality and at the same time mo...
Chapter
Since all systems and services are ultimately aimed at human users, it is essential to address the interaction between humans and machines. The acceptance of a system, i.e. the question whether a system is interpreted by a user as good or bad, is a complex construct of perception and evaluation processes. A disproportionately growing number of care...
Chapter
Ein Chatbot ist ein Computer-Programm, das automatische Antworttexte auf Text oder Spracheingaben von Nutzenden erzeugt und damit dem Bereich der „künstlichen Intelligenz“ zugeordnet wird. Menschen kommunizieren einerseits untereinander zunehmend mittels Textnachrichten, andererseits wird auch häufiger gesprochene Sprache zur Mensch-Computer-Intera...
Article
Digital tabletop environments offer a huge potential to realize application scenarios where multiple users interact simultaneously or aim to solve collaborative tasks. So far, research in this field focuses on touch and tangible interaction, which only takes place on the tabletop’s surface. First approaches aim at involving the space above the surf...
Conference Paper
Employing post-WIMP interfaces, i.e. user interfaces going beyond the traditional WIMP (Windows, Icons, Menu, Pointer) paradigm, often implies a more complex authoring process for applications. We present a novel authoring method and an according tool that aims to enable developers to cope with the added level of complexity. Regarding the developme...
Conference Paper
Full-text available
Interaction in the 3D volume above an interactive tabletop opens up new possibilities for enhancing and improving tangible user interfaces on the tabletop's surface. We conceived and implemented a set of novel interaction techniques that rely on the combination of tangible user interfaces with a 3D volumetric user interface. We used a gaming scenar...
Conference Paper
Full-text available
Integrating digital tabletop systems in private living environments is a promising approach to enhance people’s everyday life with information technology. Apart from using the surface of such a tabletop, research on the detection of interaction above and around the surface is increasing rapidly. So far, detection is limited either to very specific...
Conference Paper
Full-text available
In this paper we present a distortion technique that provides a focus & context view of an interactive surface’s screen on a mobile device. Simply showing a reduced version of the surface’s screen on the mobile device would not have been sufficient as UI elements could be too small to be manipulated. Users modify the region of interest (ROI) of the...
Conference Paper
Full-text available
In this paper, we introduce our concept of tangible contexts in the field of seamless interaction in shared workspaces between mobile devices and tabletop systems. We model the context as a relationship between a user, the user’s mobile device and objects on the surface of an interactive tabletop system. The tabletop represents the public part of t...
Conference Paper
Full-text available
We present “Goal-snapping”, a novel approach for applying snapping tech- niques to tangible and multi-touch interfaces. It can be used to support users in accom- plishing basic tasks such as aligning, sorting or grouping of virtual objects. As using snapping on large surfaces poses challenges in interaction design, we identify and dis- cuss accordi...
Conference Paper
Full-text available
ecentlypresentedtabletopsetupsthatcombinemulti-touchandin-the-airinputmech- anisms offer new interaction possibilities above and around the surface. This paper introduces a comprehensive collection of gestural interaction metaphors based on these user input mechanisms in combination with an in-depth evaluation regarding usability and design aspects...
Conference Paper
Full-text available
In dieser Arbeit wird eine Sammlung von kollaborativen Gesten für Tabletop-User-Interfaces vorgestellt. Dies sind Gesten, die von mehreren Personen gemeinsam ausgeführt werden und deren Zusammenarbeit unterstützen. Besonders für Anwendungen, in denen User miteinander agieren, ist die Erforschung der Gesten für diese Art der Interaktion wichtig. Bei...
Conference Paper
Full-text available
Table-top is collaborative work space providing large touch screen which is capable of multi-touch interface. To make an extended collaborative work space without restriction of time and place, one possible way is adoptingmobile devices. In this paper, we propose a way to monitor and control the table-top using mobile devices. To monitor the large-...
Data
Full-text available
We present a system for the detection of gestural input above a tabletop environment employing a depth sensing camera that is mounted over the surface. We discuss the challenges when combining both systems and offer according solutions. We employ computer vision methods to actually detect ges-tural input in the camera's depth images. Our detection...
Conference Paper
Full-text available
Interactive tabletop systems are suitable to offer a wide range of input modalities. Applications developed for this kind of interaction usually have to deal with each input devices individually. In this paper, we describe an architecture for interaction event processing suitable for the specific requirements in the context of tabletop systems. Our...
Conference Paper
Full-text available
In this paper an algorithm to recognize sin- gle stroke gestures using a Time-of-Flight camera is presented. To achieve this goal, freehand gesture input is provided by articulating a single stroke in three-dimensional space using a stretched finger. The position of the fingertip is tracked and gesture input can be deactivated by forming a fist. In...
Conference Paper
Full-text available
Der Virttable (Versatile Illumination Research Touch Table) ist ein Ein- und Ausgabe- gerät in Tischform, das neuartige Mensch-Maschine-Interaktion durch die Kombination von (Multi-)Touch und Tangible Interface Konzepten erlaubt. Durch sein modulares Design und seine kompakte Bauweise ist er technisch einfach erweiterbar, einfach zu transportieren...
Conference Paper
Full-text available
The presentation of 3D data in a Virtual Reality (VR) can be complemented by integrating visualizations of abstract data (like graph visualizations). While the hardware infrastructure of a VR application is also able to support the presentation of information visualizations, means of interaction like fly sticks or head-tracking are tailored to 3D n...
Thesis
Full-text available
This thesis analyzes how interactive visualizations can be realized and used with multi-touch hardware. To have multi-touch hardware at hand the multi-touch table Virttable has been built with a restricted budget. The software Vispol has been developed for testing purposes. Vispol should help the police of the state of Hesse, Germany to visualize c...
Conference Paper
Full-text available
Calculation of optimised execution plans in analytical laboratories is a demanding task for computers: It can take a long time and because of activities that have variable durations the calculated execution plan can be fairly imprecise. We present TimeTube, which is a haptic visual user interface that allows scientists to adjust and speed-up schedu...
Conference Paper
Full-text available
In an analytical laboratory, the scheduling which assays are analyzed in which order on which laboratory resources is a good example for a task that cannot be solved by a computer system alone. A computer system implementing scheduling algorithms, however, can be used to support the laboratory staff in order to find suitable schedules serving in a...

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