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Reducible dictionaries for single image super-resolution based on patch matching and mean shifting

Date

2017-03

Author

Anbarjafari, Gholamreza
Rasti, Pejman
Nasrollahi, Kamal
Orlova, Olga
Tamberg, Gert
Moeslund, Thomas B.

Metadata

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Citation

Anbarjafari, G., Moeslund, T. B., Nasrollahi, K., Orlova, O., Rasti, P., & Tamberg, G. (April 22, 2017). Reducible dictionaries for single image super-resolution based on patch matching and mean shifting. Journal of Electronic Imaging, 26, 2, 23024.

Abstract

A single-image super-resolution (SR) method is proposed. The proposed method uses a generated dictionary from pairs of high resolution (HR) images and their corresponding low resolution (LR) representations. First, HR images and the corresponding LR ones are divided into patches of HR and LR, respectively, and then they are collected into separate dictionaries. Afterward, when performing SR, the distance between every patch of the input LR image and those of available LR patches in the LR dictionary is calculated. The minimum distance between the input LR patch and those in the LR dictionary is taken, and its counterpart from the HR dictionary is passed through an illumination enhancement process. By this technique, the noticeable change of illumination between neighbor patches in the super-resolved image is significantly reduced. The enhanced HR patch represents the HR patch of the super-resolved image. Finally, to remove the blocking effect caused by merging the patches, an average of the obtained HR image and the interpolated image obtained using bicubic interpolation is calculated. The quantitative and qualitative analyses show the superiority of the proposed technique over the conventional and state-of-art methods. (C) 2017 SPIE and IS&T

Source

JOURNAL OF ELECTRONIC IMAGING

Volume

26

Issue

2

URI

https://doi.org/10.1117/1.JEI.26.2.023024
https://hdl.handle.net/20.500.11782/719

Collections

  • MF - EEM Makale Koleksiyonu [87]
  • Scopus İndeksli Yayınlar Koleksiyonu [577]
  • WoS İndeksli Yayınlar Koleksiyonu [517]



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