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Iterative Unsharp Mask Filter for Digital Auto-Focusing  

Shin, Jeong-Ho (Dept. Web Information Engineering, Hankyong National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.47, no.5, 2010 , pp. 145-152 More about this Journal
Abstract
This paper presents a digital auto-focusing algorithm using iterative unsharp mask filter. The proposed digital auto-focusing algorithm has the advantage of low computational complexity because it uses a simple filter instead of calculating the point spread function for the estimation of image degradation. The proposed iterative algorithm can control the number of iterations for image restoration according to the objective and the subjective criterion. We show that the proposed algorithm is mathematically equivalent to the conventional image restoration. Finally, in order to evaluate the performance of the proposed algorithm, various experiments are performed so that the proposed algorithm can provide good results in the sense of subjective and objective views.
Keywords
digital auto-focusing; iterative unsharp mask filter; image restoration;
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Times Cited By KSCI : 1  (Citation Analysis)
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