Joint Sparse Representation Fusing Hierarchical Deep Network of Hyperspectral Image Classification

Abstract

In joint sparse representation of hyperspectral image classification,once the local window of each pixel includes samples from different categories,the dictionary atoms and testing samples are easily affected by samples from different categories with same spectrum and the classification performance is seriously decreased.According to the characteristics of hyperspectral image,an algorithm of joint sparse representation fusing hierarchical deep network is proposed.Discriminative spectral information and spatial information are extracted by alternating spectral and spatial feature learning operations,and then a dictionary with spatial spectral features is constructed for joint sparse representation.In the classification process,the correlation coefficient between the dictionary and the testing samples is combined with classification error to make decisions.Experiments on two hyperspectral remote sensing datasets verify the effectiveness of the proposed algorithm.