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A novel hyperspectral compressive sensing framework of plant leaves based on multiple arbitrary-shape regions of interest

文献类型： 外文期刊

作者： Jia, Yuewei 1 ; Xue, Lingyun 1 ; Xu, Ping 1 ; Luo, Bin 2 ; Chen, Ke-nan 1 ; Zhu, Lei 1 ; Liu, Yian 1 ; Yan, Ming 1 ;

作者机构： 1.Hangzhou Dianzi Univ, Coll Automat, Hangzhou, Zhejiang, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Intelligent Equipment Res Ctr, Beijing, Peoples R China

关键词： Plant leaf hyperspectral images; Regions of interest; Compressive sensing; Spectral index

期刊名称：PEERJ COMPUTER SCIENCE （ 影响因子：1.392； 五年影响因子：3.897 ）

ISSN：

年卷期： 2021 年 7 卷

页码：

收录情况： SCI

摘要： Massive plant hyperspectral images (HSIs) result in huge storage space and put a heavy burden for the traditional data acquisition and compression technology. For plant leaf HSIs, useful plant information is located in multiple arbitrary-shape regions of interest (MAROIs), while the background usually does not contain useful information, which wastes a lot of storage resources. In this paper, a novel hyperspectral compressive sensing framework for plant leaves with MAROIs (HCSMAROI) is proposed to alleviate these problems. HCSMAROI only compresses and reconstructs MAROIs by discarding the background to achieve good reconstructed performance. But for different plant leaf HSIs, HCSMAROI has the potential to be applied in other HSIs. Firstly, spatial spectral decorrelation criterion (SSDC) is used to obtain the optimal band of plant leaf HSIs; Secondly, different leaf regions and background are distinguished by the mask image of the optimal band; Finally, in order to improve the compression efficiency, after discarding the background region the compressed sensing technology based on blocking and expansion is used to compress and reconstruct the MAROIs of plant leaves one by one. Experimental results of soybean leaves and tea leaves show that HCSMAROI can achieve 3.08 and 5.05 dB higher PSNR than those of blocking compressive sensing (BCS) at the sampling rate of 5%, respectively. The reconstructed spectra of HCSMAROI are especially closer to the original ones than that of BCS. Therefore, HCSMAROI can achieve significantly higher reconstructed performance than that of BCS. Moreover, HCSMAROI can provide a flexible way to compress and reconstruct different MAROIs with different sampling rates, while achieving good reconstruction performance in the spatial and spectral domains.

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