Zhou Fuqiang, Chai Xinghua, Chen Xin, Song Ya
Appl Opt. 2016 Sep 1;55(25):6813-20. doi: 10.1364/AO.55.006813.
An omnidirectional stereo vision sensor based on one single camera and catoptric system is proposed. As crucial components, one camera and two pyramid mirrors are used for imaging. The omnidirectional measurement towards different directions in the horizontal field can be performed by four pairs of virtual cameras, with a consummate synchronism and an improved compactness. Moreover, the perspective projection invariance is ensured in the imaging process, which avoids the imaging distortion reflected by the curved mirrors. In this paper, the structure model of the sensor was established and a sensor prototype was designed. The influences of the structural parameters on the field of view and the measurement accuracy were also discussed. In addition, real experiments and analyses were performed to evaluate the performance of the proposed sensor in the measurement application. The results proved the feasibility of the sensor, and exhibited a considerable accuracy in 3D coordinate reconstruction.
提出了一种基于单个相机和折反射系统的全向立体视觉传感器。作为关键部件，使用一个相机和两个角锥镜进行成像。通过四对虚拟相机可在水平场中对不同方向进行全向测量，具有完美的同步性和更高的紧凑性。此外，在成像过程中确保了透视投影不变性，避免了由曲面镜反射产生的成像畸变。本文建立了传感器的结构模型并设计了传感器原型。还讨论了结构参数对视野和测量精度的影响。此外，进行了实际实验和分析，以评估所提出的传感器在测量应用中的性能。结果证明了该传感器的可行性，并在三维坐标重建中表现出相当高的精度。
