Removing Boundary Effect of a Patch-Based Super-Resolution Algorithm

Aram KIM  Junhee PARK  Byung-Uk LEE  

IEICE TRANSACTIONS on Information and Systems   Vol.E98-D   No.4   pp.976-979
Publication Date: 2015/04/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2014EDL8219
Type of Manuscript: LETTER
Category: Image Processing and Video Processing
super-resolution,  dictionary,  sparse representation,  patch,  

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In a patch-based super-resolution algorithm, a low-resolution patch is influenced by surrounding patches due to blurring. We propose to remove this boundary effect by subtracting the blur from the surrounding high-resolution patches, which enables more accurate sparse representation. We demonstrate improved performance through experimentation. The proposed algorithm can be applied to most of patch-based super-resolution algorithms to achieve additional improvement.