Open AccessGradient‐based compressive sensing for noise image and video reconstruction
Author(s) -
Zhao Huihuang,
Wang Yaonan,
Peng Xiaojiang,
Qiao Zhijun
Publication year - 2015
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2014.0911
Subject(s) - compressed sensing , lipschitz continuity , computer science , noise (video) , iterative reconstruction , signal reconstruction , algorithm , proximal gradient methods , gradient method , mathematical optimization , mathematics , image (mathematics) , computer vision , artificial intelligence , gradient descent , signal processing , telecommunications , artificial neural network , mathematical analysis , radar
In this study, a fast gradient‐based compressive sensing (FGB‐CS) for noise image and video is proposed. Given a noise image or video, the authors first make it sparse by orthogonal transformation, and then reconstruct it by solving a convex optimisation problem with a novel gradient‐based method. The main contribution is twofold. Firstly, they deal with the noise signal reconstruction as a convex minimisation problem, and propose a new compressive sensing based on gradient‐based method for noise image and video. Secondly, to improve the computational efficiency of gradient‐based compressive sensing, they formulate the convex optimisation of noise signal reconstruction under Lipschitz gradient and replace the iteration parameter by the Lipschitz constant. With this strategy, the convergence of our FGB‐CS is reduced from O (1/ k ) to O (1/ k 2 ). Experimental results indicate that their FGB‐CS method is able to achieve better performance than several classical algorithms.