EEWWW!: Tangible Instruments for Navigating into the Human Body
Abstract
Tangible interfaces have the potential to produce common artifacts to improve collaboration, ease learning for non-expert users and ease 3D navigation. We have developed two physical devices for navigating a 3D virtual model of the human body aimed at school children. Results from a user study show that a tangible interface can be useful for encouraging collaboration, improving the learnability of a navigational interface as well as for personalizing human slice data.
ObjectClassifierViews: Support for Visual Progamming in Papier-Mache
Abstract
A major component of camera-based user interfaces is the image classifier which takes an image as input and looks for groups of pixels having a previously specified feature such as color or location. Despite their utility in systems for image retrieval, image processing, and prototyping camera-based applications, image classifiers in these existing types of systems provide little, if any, support for viewing and modifying the parameters for calibrating the classifier. In this paper, we present ObjectClassifierViews, a family of graphical user interfaces (GUIs) for exposing to the developer the internal state of the image classifier. ObjectClassifierViews are part of the Papier-Mache toolkit and allow the user to calibrate a classifier at runtime by directly manipulating the parameters or by providing examples of positive classifications. We present an evaluation of ObjectClassifierViews with an in-lab user study, which reveals that the added visibility of a classifiers internal state provided by the GUI allows the user to more quickly prototype image classifiers.
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Function Composition in Physical Chaining Applications
Abstract
We introduce the notion of function composition, an interaction technique employed in several graphical user interfaces (GUIs), for use in physical chaining applications. Allowing the user to perform function composition in systems utilizing tangible user interfaces (TUIs) for input allows for more efficient use of the interactive workspace and the physical icons. In addition, it allows the user to customize the mapping of a physical icon to a function through end-user physical macro programming. In this paper we discuss the design of function composition in physical applications, as well as lessons learned from implementing function composition in one sample application, an image manipulation application.