Zhang Yueqiang, Zhang Yi, Wang Baoqiong, Hu Biao, Jiang Zhuocan, Cai Houzhi, Yu Qifeng
Opt Express. 2023 Nov 6;31(23):38288-38304. doi: 10.1364/OE.503452.
This paper proposes a novel calibration method for the monocular laser speckle projection system. By capturing images of a calibration board with speckles under different poses, projector's optical axis is fitted and utilized to calibrate the rotation between the camera and projector. The translation is solved in closed form subsequently and projector's virtual image is recovered via homography. After calibration, the system can be regarded and operated as a binocular stereo vision system with speckle pattern. The proposed method is efficient and convenient, without need of reference image or high-precision auxiliary equipment. Validated by experiments on Astra-s and Astra-pro, it presents significant improvement in depth-estimation compared to the traditional method.
本文提出了一种用于单目激光散斑投影系统的新型校准方法。通过在不同姿态下捕获带有散斑的校准板图像，拟合投影仪的光轴并用于校准相机与投影仪之间的旋转。随后以封闭形式求解平移，并通过单应性恢复投影仪的虚拟图像。校准后，该系统可被视为并作为具有散斑图案的双目立体视觉系统运行。所提出的方法高效便捷，无需参考图像或高精度辅助设备。通过在Astra-s和Astra-pro上进行实验验证，与传统方法相比，它在深度估计方面有显著改进。
