L-0-Regularized image downscaling

• Main Authors: LIU, Junjie, HE, Shengfeng, LAU, Rynson W.H.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2018
• Subjects: Image downscaling; L-0 norm sparsity; salient edges preserving; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/7869
• Institution: Singapore Management University

In this paper, we propose a novel L-0-regularized optimization framework for image downscaling. The optimization is driven by two L-0-regularized priors. The first prior, gradient-ratio prior, is based on the observation that the number of edges in the downscaled image is approximately inverse squar...