A new low-complexity patch-based image super-resolution

Publikation: Forskning - peer reviewTidsskriftartikel

Abstrakt

In this paper, a novel single image super-resolution method, which uses a generated dic- tionary from pairs of high resolution (HR) images and their corresponding low resolution (LR) representations, is proposed. First, HR and LR dictionaries are created by dividing HR and LR images into patches Afterwards, when performing SR, the distance between every patch of the input LR image and those of available LR patches in the LR dictionary are calculated. The minimum distance between the input LR patch and those in the LR dictionary is taken, and its counterpart from the HR dictionary will be passed through an illumination enhancement process resulting in consistency of illumination between neigh- bour patches. This process is applied to all patches of the LR image. Finally, in order to remove the blocking effect caused by merging the patches, an average of the obtained HR image and the interpolated image is calculated. Furthermore, it is shown that the size of dictionaries is reducible to a great degree. The speed of the system is improved by 62.5%. The quantitative and qualitative analyses of the experimental results show the superiority of the proposed technique over the conventional and state-of-the-art methods.
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Detaljer

In this paper, a novel single image super-resolution method, which uses a generated dic- tionary from pairs of high resolution (HR) images and their corresponding low resolution (LR) representations, is proposed. First, HR and LR dictionaries are created by dividing HR and LR images into patches Afterwards, when performing SR, the distance between every patch of the input LR image and those of available LR patches in the LR dictionary are calculated. The minimum distance between the input LR patch and those in the LR dictionary is taken, and its counterpart from the HR dictionary will be passed through an illumination enhancement process resulting in consistency of illumination between neigh- bour patches. This process is applied to all patches of the LR image. Finally, in order to remove the blocking effect caused by merging the patches, an average of the obtained HR image and the interpolated image is calculated. Furthermore, it is shown that the size of dictionaries is reducible to a great degree. The speed of the system is improved by 62.5%. The quantitative and qualitative analyses of the experimental results show the superiority of the proposed technique over the conventional and state-of-the-art methods.
OriginalsprogEngelsk
TidsskriftIET Computer Vision
Vol/bind11
Tidsskriftsnummer7
Sider (fra-til)567-576
Antal sider10
ISSN1751-9632
DOI
StatusUdgivet - 2017
PublikationsartForskning
Peer reviewJa
ID: 260055679