Kernel Nyström Method for Light Transport

Jiaping Wang, Yue Dong, Xin Tong, Zhouchen Lin, Baining Guo

ACM Transactions on Graphics (TOG) - Proceedings of ACM SIGGRAPH 2009 | , Vol 28

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We propose a kernel Nyström method for reconstructing the light transport matrix from a relatively small number of acquired images. Our work is based on the generalized Nyström method for low rank ¨ matrices. We introduce the light transport kernel and incorporate it into the Nyström method to exploit the nonlinear coherence of the light transport matrix. We also develop an adaptive scheme for efficiently capturing the sparsely sampled images from the scene. Our experiments indicate that the kernel Nyström method can achieve good reconstruction of the light transport matrix with a few hundred images and produce high quality relighting results. The kernel Nyström method is effective for modeling scenes with complex ¨ lighting effects and occlusions which have been challenging for existing techniques.

Kernel Nyström Method for Light Transport

We propose a kernel Nyström method for reconstructing the light transport matrix from a relatively small number of acquired images. Our work is based on the generalized Nyström method for low rank ¨ matrices. We introduce the light transport kernel and incorporate it into the Nyström method to exploit the nonlinear coherence of the light transport matrix. We also develop an adaptive scheme for efficiently capturing the sparsely sampled images from the scene. Our experiments indicate that the kernel Nyström method can achieve good reconstruction of the light transport matrix with a few hundred images and produce high quality relighting results. The kernel Nyström method is effective for modeling scenes with complex ¨ lighting effects and occlusions which have been challenging for existing techniques.