基于紧耦合像元的自适应增强类内稀疏表示高光谱图像分类

Close coupled set of pixels-based adaptive boosting class-wise sparse representation classifier for robust hyperspectral image classification

为了充分利用稀疏表示分类算法中重构残差包含的特征信息,将重构残差的波段信息反馈到测试样本中,自适应增强样本的稀疏特征提取。但反馈调整过程可能会出现特征过拟合的问题,为了进一步提高算法的稳定性和分类精度,提出了紧耦合像元生成算法(close coupled set of pixels,CCSP)来平滑特征分布以解决过拟合问题,并最终提出了基于紧耦合像元的自适应增强类内稀疏表示高光谱图像分类方法(close coupled set of pixels-based adaptive boosting class-wise sparse representation classifier,CCSP-ABCWSRC)。在Indian Pines,University of Pavia,Salinas三个高光谱数据集上的实验结果表明,提出的算法对高光谱图像进行了稳定有效的分类并且其分类精度优于同类算法。

In order to make full use of the feature information contained in the reconstruction of the sparse representation classification algorithm, the band information of the reconstructed residual is fed back into the test sample to enhance the extraction of the feature information. However the feature may be over fitted in the feedback adjustment process. In order to further improve the stability and the classification accuracy of the pro- posed algorithm, the close coupled set of pixels （CCSP） generation algorithm is proposed to avoid the over fit- ting by smoothing the distribution of the feature. Finally, the close coupled set of pixels-based adaptive boosting class-wise sparse representation classifier （CCSP-ABCWSRC） algorithm is proposed. Experimental results based on Indian Pines, University of Pavia, Salinas three hyperspectral data sets show that the proposed algorithm is effective for hyperspectral images classification and its classification accuracy is better than the similar algorithm.