Gudrun Klinker

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In this paper, we present an approach to color image understanding that can be used to segment and analyze surfaces with color variations due to highlights and shading. The work is based on a theory—the Dichromatic Reflection Model—which describes the color of the reflected light as a mixture of light from surface reflection (highlights) and body reflection(More)
In this paper, we present an approach to color image understanding that accounts for color variations due to highlights and shading. We demonstrate that the reflected light from every point on a dielectric object, such as plastic, can be described as a linear combination of the object color and the highlight color. The colors of all light rays reflected(More)
In recent years, a large amount of software for multitouch interfaces with various degrees of similarity has been written. In order to improve interoperability, we aim to identify the common traits of these systems and present a layered software architecture which abstracts these similarities by defining common interfaces between successive layers. This(More)
Current methods for image segmentation are confused by artifacts such as highlights, because they are not based on any physical model of these phenomena. In this paper, we present an approach to color image understanding that accounts for color variations due to highlights and shading. Based on the physics of reflection by dielectric materials, such as(More)
In cars, Augmented Reality is becoming an interesting means to enhance active safety in the driving task. Guiding a driver’s attention to an imminent danger somewhere around the car is a potential application. In a research project with the automotive industry, we are exploring different approaches towards alerting drivers to such dangers. First results(More)
Mobile Augmented Reality applications promise substantial savings in time and costs for product designers, in particular, for large products requiring scale models and expensive clay mockups (e.g., cars). Such applications are novel and introduce interesting challenges when attempting to describe them to potential users and stakeholders. For example, it is(More)
After successfully integrating desktop-based concepts into drivers’ cockpits, it is now time to investigate options towards integrating 3D user interaction techniques. Such interaction techniques are becoming increasingly important to handle the ever-growing wealth of information that cars can provide to their drivers regarding traffic, road and car(More)
Like in every process model, agile processes (e.g. Scrum, eXtreme Programming) depend on accurate estimations to enable meaningful prioritization, iteration- and release planning. The emphasis of this paper is on "Planning Poker", a widely used estimation technique in agile context. The goal is to identify inaccurate effort estimates to enable more precise(More)