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基于灰度约束的三维数字散斑整像素相关搜索

Integer Pixel Correlation Searching for Three-Dimensional Digital Speckle Based on Gray Constraint

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摘要

在三维数字散斑整像素相关搜索中, 先利用极线约束和投影校正原理将相关搜索范围从整个图像约束到投影校正后的同一水平极线上, 再利用视差约束缩小搜索范围, 该相关搜索过程非常耗时。在投影校正和视差约束的基础上, 提出了基于灰度约束的三维数字散斑整像素相关搜索方法, 该方法可进一步滤除视差范围内大部分的待匹配点。当有效点个数为85783、相关窗口大小为9 pixel×9 pixel时, 相关搜索时间由7.24 s缩短为2.15 s。实验结果表明, 所提方法能有效提高三维数字散斑整像素相关搜索效率。

Abstract

In the integer pixel correction searching for three-dimensional digital speckle, the epipolar constraint and the projective rectification principle are used to constrain the correlation searching range from the whole image to the same horizontal line after projection rectification, and then the disparity constraint is used to reduce the searching scope. The correlation searching process is time-consuming. A novel integer pixel correlation searching method for three-dimensional digital speckle based on gray constraint is proposed, which is based on projective rectification and disparity constraint. The proposed method can remove most of the candidate matching points in parallax scope. When the number of valid points is 85783, the size of the correlation window is 9 pixel×9 pixel, and the correlation searching time is reduced from 7.24 s to 2.15 s. Experimental results show that the efficiency of integer pixel correction searching for three-dimensional digital speckle can be improved greatly.

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中图分类号:TP391

DOI:10.3788/cjl201744.0404003

所属栏目:测量与计量

收稿日期:2016-11-10

修改稿日期:2016-12-29

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作者单位    点击查看

何进英:深圳大学光电工程学院教育部广东省光电子器件与系统重点实验室, 深圳 518060
刘晓利:深圳大学光电工程学院教育部广东省光电子器件与系统重点实验室, 深圳 518060
彭翔:深圳大学光电工程学院教育部广东省光电子器件与系统重点实验室, 深圳 518060
李阿蒙:深圳大学光电工程学院教育部广东省光电子器件与系统重点实验室, 深圳 518060
蔡泽伟:深圳大学光电工程学院教育部广东省光电子器件与系统重点实验室, 深圳 518060

联系人作者:何进英(114227844@qq.com)

备注:何进英(1989-), 男, 硕士研究生, 主要从事三维成像方面的研究。

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引用该论文

He Jinying,Liu Xiaoli,Peng Xiang,Li A′meng,Cai Zewei. Integer Pixel Correlation Searching for Three-Dimensional Digital Speckle Based on Gray Constraint[J]. Chinese Journal of Lasers, 2017, 44(4): 0404003

何进英,刘晓利,彭翔,李阿蒙,蔡泽伟. 基于灰度约束的三维数字散斑整像素相关搜索[J]. 中国激光, 2017, 44(4): 0404003

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