Research on Convolutional Neural Network-Based Compression Methods for Multispectral Images

Abstract Considering the traits of multispectral images, which include numerous bands, high spatial and spectral redundancy, and a large data volume, there is a proposed investigation on compression methods based on convolutional neural networks to reduce the storage space consumed by an individual image and enhance compression effectiveness. This paper first introduces the development of image compression algorithms and deep learning in recent years. Based on these two structures, a framework for lossy compression of multispectral images utilizing an end-to-end convolutional neural network is proposed. A self-encoding structure is used to process three-dimensional hyperspectral images, extracting local spectral features and fusing spectral information using large convolutional kernels. Residual layers are employed to preserve spectral information. Rate-distortion optimization is performed to jointly optimize image distortion and compression bitrate. Finally, a comparison with the traditional JPEG method is conducted experiments to assess the efficacy of the proposed algorithm. The MS-SSIM is improved by nearly 0.08, and the compressed images exhibit no noticeable distortion.