Utilizing the Wavelet Transform's Structure in Compressed Sensing.

Utilizing the Wavelet Transform's Structure in Compressed Sensing.
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DOI:
10.1007/s11760-021-01872-y
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发表时间:
2021-10
期刊:
Signal, image and video processing
影响因子:
--
通讯作者:
Larson PEZ
Larson PEZ
中科院分区:
其他
文献类型:
--
作者:
Dwork N;O'Connor D;Baron CA;Johnson EMI;Kerr AB;Pauly JM;Larson PEZ

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Compressed sensing has empowered quality image reconstruction with fewer data samples than previously thought possible. These techniques rely on a sparsifying linear transformation. The Daubechies wavelet transform is commonly used for this purpose. In this work, we take advantage of the structure of this wavelet transform and identify an affine transformation that increases the sparsity of the result. After inclusion of this affine transformation, we modify the resulting optimization problem to comply with the form of the Basis Pursuit Denoising problem. Finally, we show theoretically that this yields a lower bound on the error of the reconstruction and present results where solving this modified problem yields images of higher quality for the same sampling patterns using both magnetic resonance and optical images.
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