Song Weitao, Liu Yue, Li Weiming, Wang Yongtian
Opt Express. 2015 Nov 30;23(24):31126-35. doi: 10.1364/OE.23.031126.
We propose a novel light field acquisition method based on a planar catadioptric system. Only one camera with a large field-of-view (FOV) is required, and multiple virtual cameras can be created via an array of planar mirrors to acquire the light field from different views. The spatial distribution of the virtual cameras can be configured flexibly to acquire particular light rays, which can be controlled by simply changing the positions of the mirrors. Compared with previous systems, no aberration or reduction in light transmittance is introduced by the planar mirrors, which ensures image quality. In this study, the design method of the planar catadioptric system is provided and a calibration procedure of its computational model is analyzed in detail. The method is verified by a prototype system, with which the correct digital refocusing results are achieved using the acquired, calibrated light field.
我们提出了一种基于平面折反射系统的新型光场采集方法。仅需一台具有大视场（FOV）的相机，通过平面反射镜阵列可创建多个虚拟相机，以从不同视角采集光场。虚拟相机的空间分布可灵活配置，以采集特定光线，只需简单改变反射镜位置即可控制。与先前系统相比，平面反射镜不会引入像差或降低透光率，从而确保了图像质量。在本研究中，给出了平面折反射系统的设计方法，并详细分析了其计算模型的校准过程。该方法通过一个原型系统得到验证，利用采集并校准的光场，该原型系统实现了正确的数字重聚焦结果。
