Super-resolution algorithm exploiting multiple dictionaries based on local image structures

Il-Hyun Choi; Kyoung Won Lim; Byung Cheol Song

doi:10.1117/1.OE.52.6.067002

10 June 2013 Super-resolution algorithm exploiting multiple dictionaries based on local image structures

Il-Hyun Choi, Kyoung Won Lim, Byung Cheol Song

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Optical Engineering, Vol. 52, Issue 6, 067002 (June 2013). https://doi.org/10.1117/1.OE.52.6.067002

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.

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Citation Download Citation

Il-Hyun Choi, Kyoung Won Lim, and Byung Cheol Song "Super-resolution algorithm exploiting multiple dictionaries based on local image structures," Optical Engineering 52(6), 067002 (10 June 2013). https://doi.org/10.1117/1.OE.52.6.067002

Published: 10 June 2013

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