Ms. Yaping Zhao Profile

Yaping Zhao

at The Univ. of Hong Kong

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Proceedings Article | 15 February 2022 Paper

Revisit dictionary learning for video compressive sensing under the Plug-and-Play framework

Qing Yang, Yaping Zhao

Proceedings Volume 12166, 1216682 (2022) https://doi.org/10.1117/12.2624208

KEYWORDS: Reconstruction algorithms, Denoising, Compressed sensing

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Aiming at high-dimensional (HD) data acquisition and analysis, snapshot compressive imaging (SCI) obtains the 2D compressed measurement of HD data with optical imaging systems and reconstructs HD data using compressive sensing algorithms. While the Plug-and-Play (PnP) framework offers an emerging solution to SCI reconstruction, its intrinsic denoising process is still a challenging problem. Unfortunately, existing denoisers in the PnP framework either suffer limited performance or require extensive training data. In this paper, we propose an efficient and effective shallow-learning-based algorithm for video SCI reconstruction. Revisiting dictionary learning methods, we empower the PnP framework with a new denoiser, the kernel singular value decomposition (KSVD). Benefited from the advent of KSVD, our algorithm retains a good trade-off among quality, speed, and training difficulty. On a variety of datasets, both quantitative and qualitative evaluations of our simulation results demonstrate the effectiveness of our proposed method. In comparison to a typical baseline using total variation, our method achieves around 2 dB improvement in PSNR and 0.02 in SSIM. We expect that our proposed PnP-KSVD algorithm can serve as a new baseline for video SCI reconstruction.

Proceedings Article | 15 February 2022 Paper

Revisit dictionary learning for video compressive sensing under the plug-and-play framework

Qing Yang, Yaping Zhao

Proceedings Volume 12166, 121667M (2022) https://doi.org/10.1117/12.2617995

KEYWORDS: Video compression, Video, Compressed sensing, Associative arrays, Astatine

Read Abstract +

Aiming at high-dimensional (HD) data acquisition and analysis, snapshot compressive imaging (SCI) obtains the 2D compressed measurement of HD data with optical imaging systems and reconstructs HD data using compressive sensing algorithms. While the Plug-and-Play (PnP) framework offers an emerging solution to SCI reconstruction, its intrinsic denoising process is still a challenging problem. Unfortunately, existing denoisers in the PnP framework either suffer limited performance or require extensive training data. In this paper, we propose an efficient and effective shallow-learning-based algorithm for video SCI reconstruction. Revisiting dictionary learning methods, we empower the PnP framework with a new denoiser, the kernel sigular value decomposition (KSVD). Benefited from the advent of KSVD, our algorithm retains a good trade-off among quality, speed, and training difficulty. On a variety of datasets, both quantitative and qualitative evaluations of our simulation results demonstrate the effectiveness of our proposed method. In comparison to a typical baseline using total variation, our method achieves around 2 dB improvement in PSNR and 0.02 in SSIM. We expect that our proposed PnP-KSVD algorithm can serve as a new baseline for video SCI reconstruction.

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