arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1202.6429cs.CVcs.ITcs.NAmath.ITmath.NA
收藏

利用全变差最小化的稳定图像重建

Stable image reconstruction using total variation minimization

Deanna Needell, Rachel Ward

AI总结:

本文利用全变差最小化,从欠采样噪声测量中实现图像的高精度鲁棒重建,并给出了近最优保证。

摘要:

本文提出了利用全变差最小化从欠采样噪声测量中实现准确且鲁棒的图像恢复的近最优保证。特别地,我们证明从 O(slog(N)) 个非自适应线性测量中,图像可以重建到其梯度最佳 s 项近似的对数因子范围内,并且通过略微增加测量次数可以消除该因子。在此过程中,我们证明了对于位于适当不相干矩阵零空间中的函数,存在一个加强的 Sobolev 不等式。

英文摘要:

This article presents near-optimal guarantees for accurate and robust image recovery from under-sampled noisy measurements using total variation minimization. In particular, we show that from O(slog(N)) nonadaptive linear measurements, an image can be reconstructed to within the best s-term approximation of its gradient up to a logarithmic factor, and this factor can be removed by taking slightly more measurements. Along the way, we prove a strengthened Sobolev inequality for functions lying in the null space of suitably incoherent matrices.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑