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Modeling standard plenoptic camera by an equivalent camera array

机译：通过等效相机阵列对标准全能相机进行建模

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摘要

Postprocessing of light fields enables us to extract more information from a scene compared to traditional cameras. Plenoptic cameras and camera arrays are two common methods for light field capture. It has been long recognized that the two devices are in some ways equivalent. Practically, both techniques have important constraints. Camera arrays are unable to provide high angular sampling, and the plenoptic camera can have a limited spatial sampling. In simulation, we can easily explore both constraints by simulating two-dimensional viewpoint images and combining them into a four-dimensional light field. We present a transformation for converting between equivalent plenoptic configurations and camera arrays when they capture pristine light fields produced in simulation. We use this approach to simulate light fields of simple scenes and validate our transformation by comparing the focus distance of a standard plenoptic camera and the equivalent camera array's light field. We also show how some simple practical effects can be added to the pristine, synthetic light field via postprocessing and their effect on refocusing distance.
机译：与传统相机相比，光场的后处理使我们能够从场景中提取更多信息。Plenoptic 相机和相机阵列是光场捕获的两种常用方法。人们早就认识到，这两种设备在某些方面是等价的。实际上，这两种技术都有重要的限制。相机阵列无法提供高角度采样，并且全相机的空间采样可能有限。在仿真中，我们可以通过模拟二维视点图像并将它们组合成四维光场来轻松探索这两个约束。我们提出了一种转换，用于在等效全透配置和相机阵列之间进行转换，当它们捕获仿真中产生的原始光场时。我们使用这种方法来模拟简单场景的光场，并通过比较标准全相机的焦距和等效相机阵列的光场来验证我们的变换。我们还展示了如何通过后处理将一些简单的实际效果添加到原始的合成光场中，以及它们对重新聚焦距离的影响。

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