Philip O. Ogunbona — accepted AI-conference papers

2018

Cross-Validated Bandwidth Selection for Precision Matrix Estimation

Jun Tong, Jiangtao Xi, Yanguang Yu, Philip O. Ogunbona

ICASSP 2018accepted

Inverse covariance matrix, a.k.a. precision matrix, has wide applications in signal processing and is often estimated from training samples. The quality of estimation can be poor when the sample support is low. Banding/tapering are effective regularization approaches for covariance and precision mat…

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2016

Learning structured dictionary based on inter-class similarity and representative margins

Yuyao Zhang, Philip O. Ogunbona, Wanqing Li, Gordon G. Wallace

ICASSP 2016accepted

We consider the problem of learning a structured and discriminative dictionary based on sparse representation for classification task. The structure comprises class-shared and class-specific partitions which allows the separation of common and class-specific information in the data for classificatio…

Cited by 0 Source ↗Scholar ↗