Previous user studies have suggested the occurrence of symptoms of motion or simulator sickness among active spectators of handheld projector interaction. Using the well-established Simulator Sickness Questionnaire proposed by Kennedy et al. in 1993, we asked twenty-six participants if they had any indication of such symptoms after they watched a demonstration of handheld projector interaction ...

When a person stands between a projector and a display surface a shadow occurs. We show a method to perform shadow removal using camera-based object tracking and a three-dimensional model of a room, which includes cameras, projectors, and flat surfaces. For tracking people, although we use cameras, other methods would work. To obtain the model, we adapted and use existing geometric calibration ...

Existing camera-projector calibration methods typically warp feature points from a camera image to a projector image using estimated homographies, and often suffer from errors in camera parameters and noise due to imperfect planarity of the calibration target. In this paper we propose a simple yet robust solution that explicitly deals with these challenges. Following the structured light (SL) c...

A similar solution has already been proposed by [1]. The authors have developed a system able to project video content on a stationary planar surface while moving a projector. To continuously adapt the projection, they rely on the three homographies between the screen, the camera and the projector. Since these homographies are related and the one between the screen and the camera does not chang...

Statistical Image Reconstruction and Motion Estimation for Image-Guided Radiotherapy by Yong Long Co-Chairs: Jeffrey A. Fessler and James M. Balter Image reconstruction and motion estimation are very important for image-guided radiotherapy (IGRT). Three-dimensional reconstruction of patient anatomy using X-ray computed tomography (CT) allows identification of the location of a tumor prior to tr...

Traditional approaches to computer-based presentation require the user to directly control the pre-sentation software using either a keyboard or mouse, distracting the user from the audience. Thispaper presents a self-calibrating camera-projector system that enables the user to control presenta-tions using a standard laser pointer (or other pointing device). A camera-projector syste...

We describe a calibration and rendering technique for a projector that can render rectangular images under keystoned position. The projector utilizes a rigidly attached camera to form a stereo pair. We describe a very easy to use technique for calibration of the projector-camera pair using only black planar surfaces. We present an efficient rendering method to pre-warp images so that they appea...

We describe Projector, a language that can be used to perform a mixture of typed and untyped computation against data represented in XML. For some problems, notably when the data is unstructured or semistructured, the most desirable programming model is against the tree structure underlying the document. When this tree structure has been used to model regular data structures, then these regular...