Audio-Visual Group Recognition Using Diffusion Maps
Audio-Visual Group Recognition Using Diffusion Maps
复制标题
使用扩散图进行视听组识别
DOI:
--
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发表时间:
2010
影响因子:
5.4
通讯作者:
S. Zucker
中科院分区:
文献类型:
--
作者:
Y. Keller;R. Coifman;Stéphane Lafon;S. Zucker
Data fusion is a natural and common approach to recovering the state of physical systems. But the dissimilar appearance of different sensors remains a fundamental obstacle. We propose a unified embedding scheme for multisensory data, based on the spectral diffusion framework, which addresses this issue. Our scheme is purely data-driven and assumes no a priori statistical or deterministic models of the data sources. To extract the underlying structure, we first embed separately each input channel; the resultant structures are then combined in diffusion coordinates. In particular, as different sensors sample similar phenomena with different sampling densities, we apply the density invariant Laplace-Beltrami embedding. This is a fundamental issue in multisensor acquisition and processing, overlooked in prior approaches. We extend previous work on group recognition and suggest a novel approach to the selection of diffusion coordinates. To verify our approach, we demonstrate performance improvements in audio/visual speech recognition.
DOI:
10.1073/pnas.0500334102
发表时间:
2005-05-24
影响因子:
11.1
作者:
Coifman, RR;Lafon, S;Zucker, SW
通讯作者:
Zucker, SW