Few-Shot Hyperspectral Image Classification Based on Convolutional Residuals and SAM Siamese Networks

• Published in: Electronics (Basel) Vol. 12; no. 16; p. 3415
• Main Authors: Xia, Mengen, Yuan, Guowu, Yang, Lingyu, Xia, Kunming, Ren, Ying, Shi, Zhiliang, Zhou, Hao
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.08.2023
• Subjects: Accuracy; Agricultural production; Algorithms; Artificial neural networks; Automatic classification; Classification; Deep learning; Design; Feature extraction; Hyperspectral imaging; Image classification; Image processing; Learning; Machine learning; Methods; Neural networks; Spatial data; Teaching methods; China
• DOI: 10.3390/electronics12163415
• ISSN: 2079-9292

With the development of few-shot learning, significant progress has been achieved in hyperspectral image classification using related networks, leading to improved classification outcomes. However, practical few-shot hyperspectral image classification encounters challenges such as network overfitting and insufficient feature extraction during the model training process. To address these issues, we propose a model called CRSSNet (Convolutional Residuals and SAM Siamese Networks) for few-shot hyperspectral image classification. In this model, we deepen the network depth and employ the convolutional residual technique to enhance the feature extraction capabilities and alleviate the problem of network gradient degradation. Additionally, we introduce the Spatial Attention Mechanism (SAM) to effectively leverage spatial information features in hyperspectral images. Lastly, metric learning is employed by comparing the distance between two output feature vectors to determine the label category. Experimental results demonstrate that our method achieves superior classification performance compared to other methods.