We have developed a 3D modelling system that can provide a stereo visualization in a back-projection screen environment. It takes a wireless interaction with user’s head and hand supported by a Vision Tracking System. Our model representation is based on the MeshLibrary, which is optimized for real-time rendering and can accommodate for changes of both vertex positions and mesh connectivity. Th...

In this paper, we present a new multi-screen interactive environment. The system extracts a silhouette of the participant for driving the interaction using a method that overcomes the inherent problems associated with traditional chroma-keying, background subtraction, and rear-light projection methods. We present an approach for generating a robust silhouette of the participant using specialize...

This study proposes an innovation Laser-Driven Interactive System (LaDIS), utilizing general IWBs (Interactive Whiteboard) didactics, to support student learning for rural and developing regions. LaDIS is a system made to support traditional classroom practices between an instructor and a group of students. This invention effectively transforms a general projection screen into an IWBs. Accompan...

A system for direct interaction with a video projection screen using a laser pointer is presented. The laser point on the screen is captured by a video camera, and its location recognized by image processing techniques. The behavior of the point is translated into signals sent to the mouse input of the computer causing the same reactions as if they came from the mouse. More complex interaction ...

This paper presents a study on the recognition of the visual focus of attention (VFOA) of meeting participants based on their head pose. Contrary to previous studies on the topic, in our set-up, the potential VFOA of a person is not restricted to other meeting the participants only, but include environmental targets (including a table, a projection screen). This has two consequences. First, it ...

This paper presents an evaluation of the benefits and user acceptance of a multimodal interface in which the user interacts with a game-like interactive virtual reality application “The Enigma of the Sphinx”. The interface consists of a large projection screen as the main display, a “magic wand”, a stereo sound system and the user‘s voice for “casting spells”. We present our conclusions concern...

Fluoroscopy, or real-time projection X-ray imaging, has been in clinical use since shortly after Roentgen’s discovery of X-rays. Early fluoroscopes consisted simply of an X-ray source and a fluorescent screen, between which the patient was placed. After passing through the patient, the remnant beam impinged upon the fluorescent screen and produced a visible glow, which was directly observed by ...

This paper describes a projection system using DLP projectors and parabolic mirrors to provide a 90◦ curved screen with a 4-to-1 aspect ratio. This display is intended to provide an ‘immersive’ experience for the user and facilitate a very large canvas on which to utilize multiple applications or single ones requiring a large screen. The resulting display has a 3072 × 768 pixel display area.

Teaching and learning process is the main factor in education. The use of whiteboard and marker while teaching is an essential media for delivering knowledge from a lecturer to students. In another side, it can cost in daily operation such as making marker dried because of capped-off, easily smudged and some whiteboard (for projector screen) is difficult to be clean if written. The objective is...

Multi-touch interaction with computationally enhanced surfaces has received considerable attention in recent years. Hardware implementations of multitouch interaction such as Frustrated Total Internal Reflection (FTIR) and Diffused Illumination (DI) have allowed for the low cost development of surfaces. Although many of these technologies and associated applications have been presented in acade...