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Variance Based External Dictionary for Improved Single Image Super-Resolution

  • MATHEMATICAL THEORY OF IMAGES AND SIGNALS REPRESENTING, PROCESSING, ANALYSIS, RECOGNITION, AND UNDERSTANDING
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Abstract

In this paper, we have proposed a novel method for image super-resolution using single image. Based on structural similarity index, an image similar to input low-resolution (LR) image is selected from the database and two separate external dictionaries i.e. smooth and textured, are formed from the selected image based on their variances. Different features are used for representation of different type of patches. For smooth patches norm luminance is used as feature vector and for textured patches it consist of first and second order gradients. In neighbor embedding process, a new parameter in combination with Euclidean distance has been introduced to eliminate outliers. Extensive simulations are performed to show superiority of the method.

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Authors and Affiliations

  1. Department of Electronics and Communication, National Institute of Technology, 136119, Kurukshetra, Haryana, India

    Garima Pandey & Umesh Ghanekar

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  1. Garima Pandey
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  2. Umesh Ghanekar
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Corresponding authors

Correspondence to Garima Pandey or Umesh Ghanekar.

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The authors declare that they have no conflicts of interest.

Additional information

Garima Pandey completed her B.Tech. in electronics and communication engineering and M.Tech. in communication engineering. Presently doing PhD from National Institute of Technology Kurukshetra, Kurukshtera, Haryana, India. Active in field of Image Processing and Super-resolution.

Umesh Ghanekar completed his M.Tech. degree in Electronics andCommunication Engineering in 1988 from Indian Institute of Technology, Roorkee, India and PhD in computer engineering in 2013 from National Institute of Technology Kurukshetra, Kurukshtera, Haryana, India. Presently he is a Professor in the Department of Electronics and Communication Engineering at N.I.T. Kurukshetra. His research interests include signal and image processing.

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Pandey, G., Ghanekar, U. Variance Based External Dictionary for Improved Single Image Super-Resolution. Pattern Recognit. Image Anal. 30, 70–75 (2020). https://doi.org/10.1134/S1054661820010101

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  • DOI: https://doi.org/10.1134/S1054661820010101

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