3D acquisition and stereo-camera calibration by active devices: A unique structured light encoding framework
3D acquisition and stereo-camera calibration by active devices: A unique structured light encoding framework
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DOI：
10.1016/j.optlaseng.2019.105989
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发表时间：
2020-04-01
影响因子：
4.6
通讯作者：
Razionale, A., V
中科院分区：
文献类型：
--
作者：
Barone, S.;Neri, P.;Razionale, A., V
光编码技术在三维表面重建领域中的应用非常广泛。本文提出了一种立体摄像机标定方法，它集成了结构光编码与有源数字设备。提出了结构光编码方法来明确地解决立体相机设置的立体匹配问题。采用高分辨率液晶显示屏作为标定板，显示一系列垂直和水平的二值条纹图案，并结合棋盘格图案。一束调整技术被采用，同时调整相机参数和屏幕几何形状，作为立体相机校准过程的一部分，从而考虑到可能的不准确的数字显示。同样的结构光方法，与小的变量，是由多媒体数字投影机进行投影进行3D表面重建。所提出的方法定义了一个全面的框架，用于开发的3D光学扫描仪，从校准到3D采集，这已被验证通过测量原始表面和重建自由形式的形状与不同的立体相机设置。
The use of light encoding techniques is widespread in the field of 3D surface reconstruction. This paper presents a stereo-camera calibration methodology, which integrates structured light encoding with an active digital device. The structured light encoding approach is proposed to unambiguously solve the stereo matching issue for stereo-camera setups. A sequence of vertical and horizontal binary striped patterns, combined with a checkerboard pattern, is displayed by a high-resolution LCD screen, which is used as calibration board. A bundle adjustment technique is adopted to simultaneously adjust both camera parameters and screen geometry, as part of the stereo-camera calibration process, thus taking into account the possible inaccuracies of the digital display. The same structured light approach, with small variants, is projected by a multimedia digital projector to carry out 3D surface reconstruction. The proposed methodology defines a comprehensive framework for the development of a 3D optical scanner, from calibration to 3D acquisition, which has been validated by measuring primitive surfaces and reconstructing free-form shapes with different stereo-camera setups.