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Estimation of Circularly Symmetric Point Spread Function for Digital Auto-Focusing  

Kim, Dong-Gyun (Dept. of Image Engineering, Graduate School of Advanced Image Science, Multimedia and Film, Chung-Ang University)
Park, Young-Uk (Dept. of Image Engineering, Graduate School of Advanced Image Science, Multimedia and Film, Chung-Ang University)
Lee, Jin-Hee (Dept. of Image Engineering, Graduate School of Advanced Image Science, Multimedia and Film, Chung-Ang University)
Paik, Joon-Ki (Dept. of Image Engineering, Graduate School of Advanced Image Science, Multimedia and Film, Chung-Ang University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.46, no.1, 2009 , pp. 7-13 More about this Journal
Abstract
This paper presents a circularly symmetric point spread function (PSF) estimation technique for a fully digital auto-focusing system. The proposed algorithm provides realistic, unsupervised PSF estimation by establishing the relationship between one-dimensional ideal step response and two-dimensional circularly symmetric PSF.
Keywords
Digital Auto-Focusing (DAF); Point Spread Function (PSF); Singular Value Decomposition (SVD);
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