Showing papers by "Morten Fjeld published in 2008"
20 Oct 2008
TL;DR: This paper presents a low-cost method for enabling 3D hand-computer interaction that uses the frame capturing functionality of a single consumer-grade webcam, and believes that an approach that only tracks only one marker will be more efficient than similar methods that track each finger separately.
Abstract: This paper presents a low-cost method for enabling 3D hand-computer interaction. The method, accompanied by a system, uses the frame capturing functionality of a single consumer-grade webcam. Our recent work has been focused on examining and realizing a less complex system. The presented method reduces the tracking effort to only one reference marker: a color-coded bracelet that helps locate the part of the captured frame containing the user's hand. The located area contains all the information needed to extract hand rotation and finger angle data. To facilitate hand feature extraction, we have outfitted the user's hand with a specially coded glove. The glove is equipped with two square palm markers, a marker on either side of the hand, and five distinctly shaded finger sheaths. We believe that an approach that only tracks only one marker will be more efficient than similar methods that track each finger separately. The method is further simplified by using spatial properties, drawn from physiological characteristics of the human hand, to limit the areas considered by the algorithm. Some challenges regarding webcam limitations may arise when attempting to carry this method into effect, including problems related to image noise and limited image- and color-resolution. Overlapping hands and fingers, hand positioning outside the field of view, and interference by local light sources are other exigent factors to consider.
17 citations
18 Feb 2008
TL;DR: A tool called BounceSlider for improvising music that allows the user to create and save loops of Musical Instrument Digital Interface (Midi) with up to five sounds at a time.
Abstract: The ForceFeedback Slider (FFS) is a one-dimensional actuated slider using a motor to produce tangible interaction with position and force as input and output parameters. To create a new concept, we have built a mixing desk, placed six FFSs (two implemented here) into a partially realized SliderBox, and added a LED and two toggle buttons to each slider for additional interactivity. We have developed a tool called BounceSlider for improvising music. This application for real time music performance and composition uses a slider handle that can act as a ball. Users can lift and release the handle to set the ball in motion and produce a particular sound each time it bounces against the baseline. Based on physical characteristics, the user can create different sounds and loops by changing two settings: gravity (speed) and bounce type (ball physical characteristics). BounceSlider allows the user to create and save loops of Musical Instrument Digital Interface (Midi) with up to five sounds at a time.
15 citations
01 Jan 2008
TL;DR: This paper presents a prototypical showcase application for the SpaceCat, a softly elastic six degrees of freedom input device, in order to demonstrate its suitability for game applications where precise short-range movements are required.
Abstract: A central component of 3D computer applications is the six degrees of freedom (6DOF) in interaction with the virtual environment In recent years, 3D computer graphics have been widely adopted, even in traditionally 2D applications such as web browsers and window managers Along with this development, the need for multidimensional input devices has increased and prompted the proposals of several novel input concepts and devices for different kinds of applications In this paper we present a prototypical showcase application for the SpaceCat, a softly elastic six degrees of freedom input device, in order to demonstrate its suitability for game applications where precise short-range movements are required The application shows how sword handling and camera control can be performed with the SpaceCat
4 citations
01 Jan 2008
TL;DR: In this paper, the authors present an initial step towards providing interactive training and operational tools for emergency response management actors in the event of an emergency, based on the work of van Laere et al. They show that a good emergency management plan is not enough.
Abstract: Training and simulation in Emergency Response Management (ERM) has drawn increased attention from researchers and practitioners. For one year, van Laere et al. observed and evaluated exercises and real emergency incidents in a Swedish municipality. While their study showed that training and simulation are important in ERM, a good emergency management plan is not enough. “People need to have experience of how to apply that emergency management plan and how to deal with unforeseen issues” [1]. According to ERM experts it is crucial that those actors involved practice together. Hence, training must focus on coordination and communication, probably the weakest link in the event of an emergency. Our work is an initial step towards providing interactive training and operational tools for ERM actors.
2 citations