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Adaptive Grouping Distributed Compressive Sensing Reconstruction of Plant Hyperspectral Data

机译:植物高光谱数据的自适应分组分布式压缩感知重建

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摘要

With the development of hyperspectral technology, to establish an effective spectral data compressive reconstruction method that can improve data storage, transmission, and maintaining spectral information is critical for quantitative remote sensing research and application in vegetation. The spectral adaptive grouping distributed compressive sensing (AGDCS) algorithm is proposed, which enables a distributed compressed sensing reconstruction of plant hyperspectral data. The spectral characteristics of hyperspectral data are analyzed and the joint sparse model is constructed. The spectral bands are adaptively grouped and the hyperspectral data are compressed and reconstructed on the basis of grouping. The experimental results showed that, compared with orthogonal matching pursuit (OMP) and gradient projection for sparse reconstruction (GPSR), AGDCS can significantly improve the visual effect of image reconstruction in the spatial domain. The peak signal-to-noise ratio (PSNR) at a low sampling rate (the sampling rate is lower than 0.2) increases by 13.72 dB than OMP and 1.66 dB than GPSR. In the spectral domain, the average normalized root mean square error, the mean absolute percentage error, and the mean absolute error of AGDCS is 35.38%, 31.83%, and 33.33% lower than GPSR, respectively. Additionally, AGDCS can achieve relatively high reconstructed efficiency.
机译:随着高光谱技术的发展,建立一种有效的光谱数据压缩重建方法,可以改善数据的存储,传输和维护,对于定量遥感研究及其在植被中的应用至关重要。提出了一种光谱自适应分组分布式压缩感知算法,该算法可以实现植物高光谱数据的分布式压缩感知重建。分析了高光谱数据的光谱特征,建立了联合稀疏模型​​。对光谱带进行自适应分组,并根据分组对高光谱数据进行压缩和重建。实验结果表明,与正交匹配追踪(OMP)和梯度投影稀疏重建(GPSR)相比,AGDCS可以显着改善空间域图像重建的视觉效果。低采样率(采样率低于0.2)下的峰值信噪比(PSNR)比OMP增加13.72 dB,比GPSR增加1.66 dB。在光谱域中,AGDCS的平均归一化均方根误差,平均绝对百分比误差和平均绝对误差分别比GPSR低35.38%,31.83%和33.33%。另外,AGDCS可以实现较高的重构效率。

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