期刊
IEEE ACCESS
卷 9, 期 -, 页码 112994-113006出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3104025
关键词
Image coding; Hyperspectral imaging; Imaging; Image reconstruction; Compressed sensing; Libraries; Micromirrors; Hyperspectral images; distributed compressed sensing; spectral unmixing; linear mixing model
资金
- Key Projects of Natural Science Research of Universities of Anhui Province [KJ2019A0709, KJ2020A0702]
- Overseas Visiting and Research Project for Excellent Young Key Talents in Higher Education Institutions in Anhui Province [gxgwfx2019056]
This paper proposes a distributed compressed sampling strategy to collect compressed hyperspectral data, achieving significant advantage in image reconstruction performance by exploring abundance and endmember estimation methods and applying a linear mixing model for hyperspectral images.
The ever-increasing resolution puts tremendous pressure to the onboard hyperspectral imaging system. Compressed sensing technology is one of the important ways to solve this problem. Distributed compressed sensing was proposed to exploit both intra- and inter-correlation structures of hyperspectral images. However, the implementation method of distributed compressed sampling has not been reported, and the joint sparsity reconstruction algorithm cannot achieve excellent image reconstruction performance. In this paper, a distributed compressed sampling strategy inspired by distributed compressed video sensing and optical implementation model are proposed to collect compressed hyperspectral data. In the image reconstruction process, we discard the direct application of the joint sparsity constraint on the data itself. Instead, we explore the estimation method of abundance and endmember with the help of the existing spectral library. Then, the images are recovered by applying the linear mixing model of hyperspectral. The comparison experiments of various schemes show that the proposed compressed sensing scheme has an obvious advantage in reconstruction performance under the low sampling rate. The proposed compressed sensing scheme has great potential in a high-compression ratio onboard hyperspectral imaging system.
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