Spectral image reconstruction of coded aperture spectral imaging system based on compressed sensing

Sun, Chengming; Lv, Qun-Bo

doi:10.1117/12.2652057

Cited by 1 publication

(1 citation statement)

References 7 publications

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“…In 2007, the coded aperture Snapshot spectral imager (CASSI) developed by Duke University carried out data reconstruction based on compressed sensing theory, which is an important milestone in the research of coded aperture imaging technology 2,3 . In 2019, Changchun Institute of Optics and Machinery developed a coded aperture spectral imager based on compressed sensing, optimized the coded aperture, and proposed a spectral unmixing algorithm with higher speed and accuracy 4 . At the same time, motion compensation imaging technology can also increase the integration time of ground pixels, so as to improve the signal-to-noise ratio of remote sensing images.…”

Section: Introductionmentioning

confidence: 99%

Effect analysis of motion compensation on imaging quality of spaceborne coded aperture hyperspectral imager

Li,

Liu,

Qiu

et al. 2023

Sensors, Systems, and Next-Generation Satellites XXVII

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Coded aperture imaging spectrometer is a new type of hyperspectral imaging instrument. The space-borne hyperspectral imager makes images by pushing and sweeping. In the ideal imaging model, it is assumed that one pixel is separated between two adjacent frames so that the target information can be accurately reconstructed. When coding aperture imaging is performed under motion compensation, the moving distance of the object image on the focal plane at each imaging time is different, and there is an amount of dislocation, resulting in decoding error of the decoded and restored data along the direction of the orbit, and the phenomenon of ground object "double shadow" and spectral decoding distortion appear in the simulation image. The amount of misalignment under different compensation modes is different, resulting in different decoding errors. The mathematical model of target data encoding and decoding in push-sweep coded aperture imaging and the mathematical model of field of view optical axis angular velocity in motion compensation mode were constructed. The simulation method of coded aperture imaging hyperspectral data under motion compensation was established, and the simulation data quality was analyzed. Through data quality analysis, it can be seen that under the uniform angular velocity mode, the uniform ground velocity mode and the uniform integral time mode, the cumulative amount of dislocation decreases successively, which is 5.7 m, 0.7 m and 0 m, respectively. The "double shadow" phenomenon of the simulated image becomes less and less obvious, and the image quality becomes clearer and clearer. Meanwhile, the restoration and reconstruction accuracy of the coding aperture imaging improves successively.

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Section: Introductionmentioning

confidence: 99%