A0851
Title: Density-based clustering with kernel diffusion
Authors: Chao Zheng - University of Southampton (United Kingdom) [presenting]
Abstract: Finding a suitable density function is essential for density-based clustering algorithms such as DBSCAN and DPC. A naive density corresponding to the indicator function of a unit d-dimensional Euclidean ball is commonly used in these algorithms. Such density suffers from capturing local features in complex datasets. To tackle this issue, a new kernel diffusion density function is proposed, which is adaptive to data of varying local distributional characteristics and smoothness. Furthermore, a surrogate is developed that can be efficiently computed in linear time and space and prove that it is asymptotically equivalent to the kernel diffusion density function. Extensive empirical experiments on benchmark and large-scale face image datasets show that the proposed approach not only achieves a significant improvement over classic density-based clustering algorithms but also outperforms the state-of-the-art face clustering methods by a large margin.
