期刊
APPLIED SCIENCES-BASEL
卷 12, 期 14, 页码 -出版社
MDPI
DOI: 10.3390/app12147172
关键词
near-lossless compression; recursive least squares; hyperspectral image; predictive coding
类别
资金
- Chinese Academy of Sciences Project [CXJJ-20S017]
This study proposes a prediction-based compression scheme for hyperspectral images, which significantly reduces the image size by removing redundant information, and analyzes the optimal number of prediction bands through experiments.
The hyperspectral image compression scheme is a trade-off between the limited hardware resources of the on-board platform and the ever-growing resolution of the optical instruments. Predictive coding attracts researchers due to its low computational complexity and moderate memory requirements. We propose a near-lossless prediction-based compression scheme that removes spatial and spectral redundant information, thereby significantly reducing the size of hyperspectral images. This scheme predicts the target pixel's value via a linear combination of previous pixels. The weight matrix of the predictor is iteratively updated using a recursive least squares filter with a loop quantizer. The optimal number of bands for prediction was analyzed experimentally. The results indicate that the proposed scheme outperforms state-of-the-art compression methods in terms of the compression ratio and quality retrieval.
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