Use of customizing kernel sparse representation for hyperspectral image classification

Abstract

Sparse representation-based classification (SRC) has attracted increasing attention in remote-sensed hyperspectral communities for its competitive performance with available classification algorithms. Kernel sparse representation-based classification (KSRC) is a nonlinear extension of SRC, which makes pixels from different classes linearly separable. However, KSRC only considers projecting data from original space into feature space with a predefined parameter, without integrating a priori domain knowledge, such as the contribution from different spectral features. In this study, customizing kernel sparse representation-based classification (CKSRC) is proposed by incorporating kth nearest neighbor density as a weighting scheme in traditional kernels. Analyses were conducted on two publicly available data sets. In comparison with other classification algorithms, the proposed CKSRC further increases the overall classification accuracy and presents robust classification results with different selections of training samples.

A survey on representation-based classification and detection in hyperspectral remote sensing imagery

“…Similarly, spatial-spectral kernel SRC (KSRC), with the consideration of spatially adjacent information was proposed in [79]. In [80], KSRC was presented by incorporating nearest neighbor density as a weighting strategy in traditional kernels. In [81], KSRC based on regionlevel local feature kernels was discussed.…”