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Image resolution upscaling in the wavelet domain using directional cycle spinning
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Date
2005-10-01
Author
Temizel, Alptekin
VLACHOS, THEO
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Cycle spinning, a technique mainly used for wavelet denoising, has also been shown to be successful toward image resolution upscaling in the wavelet domain. We propose a directional variant of the cycle spinning methodology. We obtain estimates of local edge orientation from a wavelet decomposition of the available low-resolution image and use this information to influence the choice of cycle spinning parameters that are employed for resolution upscaling. Our experimental results show that the proposed method outperforms competing methods for a wide range of images offering modest but consistent improvements both in objective as well as subjective terms. Lower computational complexity compared to the conventional cycle spinning is also demonstrated. (c) 2005 SPIE and IS&T.
Subject Keywords
Enhancement
URI
https://hdl.handle.net/11511/30791
Journal
JOURNAL OF ELECTRONIC IMAGING
DOI
https://doi.org/10.1117/1.2061247
Collections
Graduate School of Informatics, Article