蒋斌,赵子龙,宋展,谷飞飞.低成本微型结构光动态三维重建系统研究[J].集成技术,2020,9(3):1-14
低成本微型结构光动态三维重建系统研究
Low-Cost and Miniature Structured Light System for 3D Dynamic Reconstruction
投稿时间:2020-02-26  修订日期:2020-03-12
DOI:10.12146/j.issn.2095-3135.20200226001
中文关键词:  结构光;低成本;优化标定;极线校正;动态三维重建
英文关键词:structured light; low cost; optimal calibration; epipolar rectification; 3D dynamic reconstruction
基金项目:国家重点研发计划项目(2017YFB1103602);深圳市自然科学基金项目(JCYJ20190806171403585);广东省自然科学基金项目 (2018A030310668, 2020A1515010486);广东省重点领域研发计划项目(2019B010149002);深圳市科技计划项目(GGFW2018020618063670)
作者单位
蒋斌 湖南大学 信息科学与工程学院 长沙 410082 
赵子龙 湖南大学 信息科学与工程学院 长沙 410082;中国科学院深圳先进技术研究院 深圳 518055 
宋展 中国科学院深圳先进技术研究院 深圳 518055 
谷飞飞 中国科学院深圳先进技术研究院 深圳 518055 
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中文摘要:
      基于激光散斑投射的结构光技术只需单张图像即可实现三维重建,是重要的动态测量手段之 一。然而,散斑结构光技术在实际中的测量精度较低,无法满足精确测量需求。该研究开发了一套低 成本微型结构光系统,提出一种高精度的双目摄像机标定优化方法以及基于两步旋转的立体图像校正 方法,提高了系统参数的标定和测量精度。其中,测量系统由一个微型的光学发射器和两个摄像头组 成。通过将带有伪随机斑点的单张图案投影到目标对象的表面上,并通过双目相机成像,最终利用特 征匹配和三角原理恢复目标的深度和轮廓信息。经测试,所提出的微型结构光系统在使用优化的标定 和校正参数的条件下,对圆球、圆柱等标准体的测量精度相比传统标定方法显著提升。其中,球体重 建误差为 1.05 mm,精度提升 52.38%;圆柱重建误差为 1.61 mm,精度提高了 63.98%。
英文摘要:
      The laser speckles based structured light technique performs 3D reconstruction with a single shot, which makes it one of the most important ways to achieve dynamic measurement. However, it is inaccurate, which makes it difficult to meet the needs of accurate measurement. This paper develops a low-cost and miniature 3D vision system for dynamic depth recovery. A high-precision calibration optimization method for binocular camera and an optimal stereo image correction method based on a two-step rotation are proposed, which improves the calibration and measurement accuracy of system’s parameters. Our system consists of a miniature projector and two cameras. A single pattern with pseudo-random speckles is projected onto the surface of the target object and imaged by a stereo camera. Another single pattern with pseudo-random spots is projected onto the surface of the target object. The depth and contour information of the target is recovered by using the feature matching and triangulation principle. After testing, the measurement accuracy of the proposed structured light system is significantly higher than that of the traditional calibration method under the condition of using optimized calibration and rectification parameters. Compared with traditional method, the sphere reconstruction error of the proposed system is 1.05 mm, and the accuracy has been increased by 52.38%. The cylinder reconstruction error is 1.61 mm, and the accuracy has been increased by 63.98%.
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