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Optical Engineering

Improved directional weighted interpolation method for single-sensor camera imaging
Author(s): Liwen He; Xiangdong Chen; Gwanggil Jeon; Jechang Jeong
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Paper Abstract

We present an improved directional weighted interpolation method for single-sensor camera imaging. By observing the fact that the conventional directional weighted interpolation methods are based on unreliable assumptions using spectral correlation, a contribution of this work is made using an antialiasing finite impulse response filter to improve the interpolation accuracy by exploiting robust spectral correlation. We also make a contribution toward refining the interpolation result by using the gradient inverse weighted filtering method. An experimental analysis of images revealed that our proposed algorithm provided superior performance in terms of both objective and subjective image quality compared to conventional directional weighted demosaicking algorithms. Our implementation has very low complexity and is, therefore, well suited for real-time applications.

Paper Details

Date Published: 11 September 2014
PDF: 12 pages
Opt. Eng. 53(9) 093103 doi: 10.1117/1.OE.53.9.093103
Published in: Optical Engineering Volume 53, Issue 9
Show Author Affiliations
Liwen He, Nanjing Univ. of Posts and Telecommunications (China)
Xiangdong Chen, Nanjing Univ. of Posts and Telecommunications (China)
Gwanggil Jeon, Incheon National Univ. (Korea, Republic of)
Jechang Jeong, Hanyang Univ. (Korea, Republic of)


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