Y. Wang (Canada) and Y. Sun (PRC)
clustering methods, image segmentation
Standard spectral clustering requires finding the eigenvec tors of the affinity matrix of all the data point. The time and space complexity of this operation is a barrier to the scalability of this algorithm. In this paper, we propose a fast spectral clustering algorithm based on Lanczos iter ation and fast N-body methods. We apply our algorithm on both synthetic data and the real-world problem of color image segmentation. Our results show that our approach significantly reduce the time and space requirement.
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