| 一种数字全息图零级项消除的新方法 |
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| 引用本文： | 柴晓冬,李晓辉. 一种数字全息图零级项消除的新方法[J]. 计算物理, 2010, 27(3): 463-467 |
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| 作者姓名： | 柴晓冬 李晓辉 |
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| 作者单位： | 1. 上海工程技术大学轨道交通学院, 上海 201620;2. 安徽大学计算智能与信号处理教育部重点实验室, 安徽 合肥 230039 |
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| 基金项目： | 国家自然科学基金(60572129);;上海市教育委员会重点学科建设(J51401)资助项目 |
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| 摘 要： | 针对离轴数字全息图中的零级项问题,提出用独立分量分析方法对零级项进行压缩.首先通过CCD获取同一物体的两幅干涉强度不同的全息图构成观测信号,然后采用独立分量分析方法(Independent Component Analysis(ICA))从观测信号中分离出零级项和共轭项,再从获得的共轭项中减去残余的零级项分量,实现零级项的有效压缩,并用模拟结果论证该方法在处理零级项压缩方面的优越性和有效性.
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| 关 键 词： | 信息光学 光学信号处理 数字全息图 独立分量分析 零级项 |
| 收稿时间： | 2009-02-09 |
| 修稿时间： | 2009-10-29 |
A Method for Zero-order Term Elimination in Digital Holography |
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| CHAI Xiaodong,LI Xiaohui. A Method for Zero-order Term Elimination in Digital Holography[J]. Chinese Journal of Computational Physics, 2010, 27(3): 463-467 |
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| Authors: | CHAI Xiaodong LI Xiaohui |
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| Affiliation: | 1. College of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620, China;2. The Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230039, China |
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| Abstract: | By using independent component analysis,a suppression method for zero-order term is proposed in off-axis digital holography.At first,two different amplitude frames of holograms are captured by a CCD-camera to form an observation signal.Secondly,a twin-image and a zero-order term are separated by means of independent component analysis.Finally,a separated twinimage is subtracted remnants zero-order term,which eliminates the zero-order term effectively.Computer imitating experiments show that this method is b... |
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| Keywords: | information optics optics signal processing digital holography independent component analysis zero-order term |
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