Chinese Journal of Lasers, Volume. 36, Issue 11, 2989(2009)
Derivatives-Based Autofocus Algorithms for the Digital Holographic Imaging
Four derivatives-based autofocus criteria functions are proposed through bringing several applicable computational methods of derivatives into the study of autofocus algorithms for the digital holographic imaging. By analyzing the transfer of noise produced during recording in phase shifting digital holography,the impact of noise on the derivatives-based autofocus algorithms is investigated. The results from the simulation and experiment indicate Prewitt gradient (PRG) and Tenebaum gradient (TEG) criteria functions,together with the angular spectrum reconstruction routine can form two types of efficient and reliable autofocus algorithms.
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Liu Changgeng, Wang Dayong, Zhang Yizhuo, Zhao Jie, Wan Yuhong, Jiang Zhuqing. Derivatives-Based Autofocus Algorithms for the Digital Holographic Imaging[J]. Chinese Journal of Lasers, 2009, 36(11): 2989
Category: holography and information processing
Received: Dec. 26, 2008
Accepted: --
Published Online: Nov. 11, 2009
The Author Email: Changgeng Liu (liuchanggeng34@emails.bjut.edu.cn)