Multivariate Online Kernel Density Estimation
Multivariate Online Kernel Density Estimation
复制标题
多元在线核密度估计
DOI:
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发表时间:
2010
期刊:
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通讯作者:
M. Kristan
中科院分区:
文献类型:
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作者:
M. Kristan
We propose an approach for online kernel den- sity estimation (KDE) which enables building probability density functions from data by observing only a single data- point at a time. The method maintains a non-parametric model of the data itself and uses this model to calculate the corresponding KDE. We propose an new automatic band- width selection rule, which can be computed directly from the non-parametric model of the data. Low complexity of the modelismaintainedthroughanovelcompressionandrefine- ment scheme. We compare the online KDE to some state-of- the-art batch KDEs on examples of estimating distributions and on an example of classification. The results show that the online KDE generally achieves comparable performance to the batch approaches, while producing models with lower complexity and allowing online updating using only a single observation at a time.