2012/02/29 by Deanna Needell, Rachel Ward, Needell, Deanna +1
Engineering · Mathematics · Medicine · #41A46 #68Q25 #68W20 #90C27 #Computer Vision and Pattern Recognition (cs.CV) #FOS: Computer and information sciences #FOS: Mathematics #Information Theory (cs.IT) #Medical Imaging Techniques and Applications #Numerical Analysis (math.NA) #Numerical methods in inverse problems #Sparse and Compressive Sensing Techniques
paper · pdf · doi:10.48550/arxiv.1202.6429
openalex publication_date 2012/02/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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.