Marker cube and probe sphere based illuminant detection algorithm

Jin-tao Ma; Ya Zhou; Qun Hao; Yang Zhang

doi:10.1117/12.791533

5 March 2008 Marker cube and probe sphere based illuminant detection algorithm

Jin-tao Ma, Ya Zhou, Qun Hao, Yang Zhang

Proceedings Volume 6623, International Symposium on Photoelectronic Detection and Imaging 2007: Image Processing; 66231X (2008) https://doi.org/10.1117/12.791533
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

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.

Citation Download Citation

Jin-tao Ma, Ya Zhou, Qun Hao, and Yang Zhang "Marker cube and probe sphere based illuminant detection algorithm", Proc. SPIE 6623, International Symposium on Photoelectronic Detection and Imaging 2007: Image Processing, 66231X (5 March 2008); https://doi.org/10.1117/12.791533

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