In this paper, the DCV is extended to nonlinear case, by performing the Gram-Schmidt orthogonalization twice in feature space, which involving computing two kernel matrices and performing a Cholesky decomposition of a kernel matrix.

• 该文将DCV方法推广到非线性领域,将两次Gram-Schmidt正交化过程,转化为只需计算两个核矩阵和进行一次Cholesky分解完成,且得到的非线性Fisher鉴别矢量有标准正交的性质。