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7 April 2015Single-image super-resolution using directional total variation regularization and alternating direction method of multiplier solver

Qiang Wang, Zhenghua Wu,Mingjian Sun,Ting Liu,Bo Li,Naizhang Feng,Yi Shen

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Qiang Wang,¹ Zhenghua Wu,¹ Mingjian Sun,¹ Ting Liu,¹ Bo Li,¹ Naizhang Feng,¹ Yi Shen¹

¹Harbin Institute of Technology (China)

Funded by:National Natural Science Foundation of China, National Science Foundation of China, Natural Science Foundation of China, National Science Foundations of China, National Natural Science Foundation of China (NSFC), Fundamental Research Funds for the Central Universities

Journal of Electronic Imaging, Vol. 24, Issue 2, 023026 (April 2015).https://doi.org/10.1117/1.JEI.24.2.023026

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Abstract

Single-image super-resolution (SR) is one of the most important and challenging issues in image processing. To produce a high-resolution image from a low-resolution image, one of the conventional approaches is to leverage regularization to overcome the limitations caused by the modeling. However, conventional regularizers such as total variation always neglect the high-level structures in the data. To overcome the drawback, we propose to explore the underlying information for the images with structured edges by using directional total variation. An alternating direction method of a multiplier-based algorithm is presented to effectively solve the resulting optimization problem. Computer simulations on several texture images such as a leaf image have been used to demonstrate the effectiveness and improvement of the proposed method on SR reconstruction, both qualitatively and quantitatively. Furthermore, the effect of parameter selection is also discussed for the proposed method.

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Qiang Wang,Zhenghua Wu,Mingjian Sun,Ting Liu,Bo Li,Naizhang Feng, andYi Shen"Single-image super-resolution using directional total variation regularization and alternating direction method of multiplier solver," Journal of Electronic Imaging 24(2), 023026 (7 April 2015).https://doi.org/10.1117/1.JEI.24.2.023026

Published: 7 April 2015

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