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Proceedings Paper

Marker cube and probe sphere based illuminant detection algorithm
Author(s): Jin-tao Ma; Ya Zhou; Qun Hao; Yang Zhang
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Paper Abstract

In order to integrate seamlessly a virtual object in a real scene in augmented reality (AR) system, we need to simulate the interactions of the virtual object with the illumination of the scene. Acquiring the knowledge of illuminant direction is crucial in this work. We present a novel approach for estimating the direction from a single image of a scene that is illuminated by a light source regardless it is point light source or directional one. We propose to employ a marker cube, which is used to register to determine the rigid transformation relating 2D images to known 3D geometry, and a Lambertian probe sphere, which is used to estimate the light source direction by image processing. The key process is finding and extracting the intensity occluding curve on the sphere. Experimental results show that our approach is computationally efficient and the light source direction can be accurately obtained by it.

Paper Details

Date Published: 5 March 2008
PDF: 8 pages
Proc. SPIE 6623, International Symposium on Photoelectronic Detection and Imaging 2007: Image Processing, 66231X (5 March 2008); doi: 10.1117/12.791533
Show Author Affiliations
Jin-tao Ma, Beijing Institute of Technology (China)
Ya Zhou, Beijing Institute of Technology (China)
Qun Hao, Beijing Institute of Technology (China)
Yang Zhang, Beijing Institute of Technology (China)

Published in SPIE Proceedings Vol. 6623:
International Symposium on Photoelectronic Detection and Imaging 2007: Image Processing

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