2024-04-20
Supervised Manifold Learning-Based Polarimetric-Spatial Feature Extraction for PolSAR Image Classification
By
Progress In Electromagnetics Research M, Vol. 127, 11-22, 2024
Abstract
In order to improve the classification performance of Polarimetric Synthetic Aperture Radar (PolSAR) image by synthesizing various polarimetric features, a supervised manifold learning method is proposed in this paper for PolSAR feature extraction and classification. Under the umbrella of tensor algebra, the proposed method characterizes each pixel with a feature tensor by combining the high-dimensional feature information of all the pixels within its local neighborhood. The tensor representation mode integrates the polarimetric information and spatial information, which is beneficial for alleviating the influence of speckle noise. Then, the tensor discriminative locality alignment (TDLA) method is introduced to seek the multilinear transformation from the original polarimetric-spatial feature tensor to the low-dimensional feature. The label information of training samples is utilized during feature transformation and feature mapping; therefore, the discriminability of different classes can be well preserved. Based on the extracted features in the low-dimensional space, the SVM classifier is applied to achieve the final classification result. The experiments implemented on two real PolSAR data sets verify that the proposed method can extract the features with better stability and separability, and obtain superior classification results compared to several state-of-the-art methods.
Citation
Hui Fan, Wei Wang, Sinong Quan, Xi He, and Jie Deng, "Supervised Manifold Learning-Based Polarimetric-Spatial Feature Extraction for PolSAR Image Classification," Progress In Electromagnetics Research M, Vol. 127, 11-22, 2024.
doi:10.2528/PIERM24010904
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