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Optical Engineering

Super-resolution algorithm exploiting multiple dictionaries based on local image structures
Author(s): Il-Hyun Choi; Kyoung Won Lim; Byung Cheol Song
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Paper Abstract

We propose an example-based superresolution algorithm that adaptively exploits multiple dictionaries based on local image structures. Noise, irregularities, and blurred textures are noticeable artifacts in the reconstructed image due to a shortage of relevant examples and false exploration in the dictionary. These artifacts are emphasized during successive enhancement. We alleviate the artifacts by constructing multiple dictionaries coupled with different sharpness levels during the learning phase. We exploit these dictionaries adaptively based on local image structures during the synthesis phase. Experimental results show that the proposed algorithm provides more detailed images with significantly reduced artifacts while consuming only 8.6% of storage capacity and 0.25% of CPU running time in comparison with a typical example-based superresolution algorithm based on neighbor embedding.

Paper Details

Date Published: 10 June 2013
PDF: 17 pages
Opt. Eng. 52(6) 067002 doi: 10.1117/1.OE.52.6.067002
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Il-Hyun Choi, Inha Univ. (Korea, Republic of)
Kyoung Won Lim, Inha Univ. (Korea, Republic of)
Byung Cheol Song, Inha Univ. (Korea, Republic of)

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