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Detection of a Virtual Passive Pointer

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Author(s): Naren Vira | Shaleen Vira

Journal: International Journal of Image Processing
ISSN 1985-2304

Volume: 3;
Issue: 2;
Start page: 55;
Date: 2009;
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Keywords: Modeling and Simulation | Image Processing | Triangulation Technique | Virtual Pointer Detection | Interactive Large Display

ABSTRACT
The paper presents a methodology for detecting a virtual passive pointer. Thepassive pointer or device does not have any active energy source within it (asopposed to a laser pointer) and thus cannot easily be detected or identified. Themodeling and simulation task is carried out by generating high resolution colorimages of a pointer viewing via two digital cameras with a popular threedimensional(3D) computer graphics and animation program, Studio 3D Max byDiscreet. These images are then retrieved for analysis into a Microsoft’s VisualC++ program developed based on the theory of image triangulation. The programoutputs a precise coordinates of the pointer in the 3D space in addition to it’sprojection on a view screen located in a large display/presentation room. Thecomputational results of the pointer projection are compared with the knownlocations specified by the Studio 3D Max for different simulated configurations.High pointing accuracy is achieved: a pointer kept 30 feet away correctly hits thetarget location within a few inches. Thus this technology can be used inpresenter-audience applications.
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