联合空间多尺度与频域特征的高光谱图像分类

    Joint spatial multiscale and frequency domain features for hyperspectral image classification

    • 摘要: 传统的高光谱分类通常聚焦于光谱特征、空间特征提取和分类器设计。随着深度神经网络的广泛应用,浅层特征与深层特征联合应用使对高光谱图像进行更精细的分类成为可能。文章提出了一种联合空间多尺度与频域特征(SMFDF)的高光谱图像分类方法。该方法引入空间多尺度特征模块(SMFM)和频域-通道注意力模块(FDCAM),旨在解决传统方法中特征提取不充分和频域信息缺失等问题。SMFM利用多层池化操作在不同尺度上深度挖掘空间特征,而FDCAM将通道注意力和频域特征提取相结合,通过注意力机制引导频域信息选择来提高特征的表达能力。实验结果表明,所提方法能够在高光谱图像分类任务中显著提高分类精度。

       

      Abstract: Traditional hyperspectral classification usually focuses on spectral features, spatial feature extraction and classifier design. With the wide application of deep neural networks, the joint application of shallow features and deep features makes it possible to classify hyperspectral images at a finer level. In this paper, a hyperspectral image classification method with joint spatial multiscale and frequency domain features (SMFDF) is proposed. The method introduces spatial multiscale feature module (SMFM) and frequency domain-channel attention module (FDCAM), aiming to solve the problems of insufficient feature extraction and lack of frequency domain information in traditional methods. SMFM utilizes multi-layer pooling operations to deeply mine spatial features at different scales, while FDCAM combines channel attention and frequency domain feature extraction to improve feature expression by guiding the frequency domain information selection through the attention mechanism. Experimental results show that the proposed method can significantly improve the classification accuracy in hyperspectral image classification tasks.