This paper presents a single-shot light field (LF) acquisition method using a conventional camera. The proposed method does not require any modification in the camera design and instead involves an offline calibration process. The calibration step involves the estimation of the point spread function (PSF) for different perspectives at all sampled depths. PSF relates perspective image captured with a narrow aperture opening to the central image captured with wider aperture opening containing multiple perspectives of the same scene superimposed on each other. During LF extraction, different perspective images are obtained by deconvolving the wide aperture input image with the set of PSFs estimated in the offline calibration phase. The experimental results demonstrate that the proposed method generates high angular and spatial resolution LF.

本文提出了一种使用传统相机的单次光场 (LF) 采集方法。所提出的方法不需要对相机设计进行任何修改，而是涉及离线校准过程。校准步骤涉及在所有采样深度的不同视角估计点扩散函数 (PSF)。PSF 将使用较窄光圈开口捕获的透视图像与使用较宽光圈开口捕获的中心图像相关联，其中包含彼此叠加的同一场景的多个透视图。在 LF 提取过程中，通过对大孔径输入图像与离线校准阶段估计的 PSF 集进行反卷积来获得不同的透视图像。实验结果表明，该方法产生了高角度和空间分辨率的LF。