2 code implementations • 16 Sep 2019 • Kai-Xuan Chen, Xiao-Jun Wu, Jie-Yi Ren, Rui Wang, Josef Kittler
We consider a family of structural descriptors for visual data, namely covariance descriptors (CovDs) that lie on a non-linear symmetric positive definite (SPD) manifold, a special type of Riemannian manifolds.
no code implementations • 28 Jun 2018 • Rui Wang, Xiao-Jun Wu, Kai-Xuan Chen, Josef Kittler
The core of the method is a new discriminant function for metric learning and dimensionality reduction.
no code implementations • 16 Jun 2018 • Kai-Xuan Chen, Xiao-Jun Wu, Rui Wang, Josef Kittler
We propose a novel framework for representing image sets by approximating infinite-dimensional CovDs in the paradigm of the Nystr\"om method based on a Riemannian kernel.
no code implementations • 16 Jun 2018 • Kai-Xuan Chen, Xiao-Jun Wu
In the domain of pattern recognition, using the SPD (Symmetric Positive Definite) matrices to represent data and taking the metrics of resulting Riemannian manifold into account have been widely used for the task of image set classification.
no code implementations • 30 May 2018 • Rui Wang, Xiao-Jun Wu, Kai-Xuan Chen, Josef Kittler
In image set classification, a considerable advance has been made by modeling the original image sets by second order statistics or linear subspace, which typically lie on the Riemannian manifold.
2 code implementations • 16 Nov 2017 • Xiang Zhang, Lina Yao, Salil S. Kanhere, Yunhao Liu, Tao Gu, Kai-Xuan Chen
The proposed approach is evaluated over 3 datasets (two local and one public).
Human-Computer Interaction