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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:

28

期数:

2018年03期

页码:

150-153

栏目:

应用开发研究

出版日期:

2018-03-10

文章信息/Info

Title:

Application of OpenMP Parallel Program in 3D Reconstruction of Digital Holography

文章编号:

1673-629X(2018)03-0150-04

作者:

马 静1 ; 邸江磊2 ; 肖 锋1

1. 西安工业大学 计算机科学与工程学院,陕西 西安 710032;
2. 西北工业大学 理学院,陕西 西安 710072

Author(s):

MA Jing1 ; DI Jiang-lei2 ; XIAO Feng1

1. School of Computer Science and Engineering,Xi’an Technological University,Xi’an 710032,China;
2. School of Science,Northwestern Polytechnical University,Xi’an 710072,China

关键词:

数字全息; 三维重构; 并行算法; OpenMP

Keywords:

digital holography; three-dimensional reconstruction; parallel algorithm; OpenMP

分类号:

TP311.11

DOI:

10.3969/ j. issn.1673-629X.2018.03.032

文献标志码:

A

摘要:

随着计算机和 CCD 技术的发展,全息技术与现代计算机技术、数字图像处理技术、空间光调制技术及自动化技术相结合,成为一种新技术-数字全息成像技术。 正因为数字全息技术涉及光学全息技术、计算机技术、电子成像技术,所以它不仅可以得到原始物体的振幅,还能得到相位信息,使其在重构三维物体表面形态方面具有一定的优势。 分析了基于卷积的离轴数字全息重构的基本原理,建立了离轴数字全息三维重构的一般过程,通过最小范数法对图像进行解包裹计算。 结合全息重构算法,使用 C 语言实现了数字全息三维重构软件的设计和开发。 通过重构软件对 CCD 采集的全息图进行重构,在重构的过程中,比较了 OpenMP 的不同并行方法对重构时间的影响。 结果表明,OpenMP 并行方法可以有效地提高数字全息三维重构的速度,并得到了理想的重构效果。

Abstract:

With the development of computer and CCD technology,holographic technology is combined with modern computer technology,digital image processing technology,spatial light modulation technology and automation technology,which forms a new holographic imaging technology - digital holography. Because digital holography technology involves optical holography,computer technology,and electronic imaging technology,it can get both the original object amplitude and its phase information,which makes it advantageous in the reconstruction of three-dimensional surface morphology. In this paper,we analyze the basic principle of off-axis digital holography reconstruction based on convolution and establish the general process of three-dimensional reconstruction of off-axis digital holography.Combined with holographic reconstruction algorithm,the design and development of 3D reconstruction software for digital holography is realized by C language. The hologram collected by CCD is reconstructed by reconstructing software. In the reconstruction,the influence of different OpenMP parallel methods on reconstruction time is made a contrast. The results show that the OpenMP parallel method can effectively improve the reconstruction speed in the digital holographic three - dimensional reconstruction and obtain the ideal reconstruction result.

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更新日期/Last Update: 2018-05-15