High-Resolution Light Field Capture With Coded Aperture
High-Resolution Light Field Capture With Coded Aperture
复制标题
使用编码光圈进行高分辨率光场捕捉
DOI：
10.1109/tip.2015.2468179
复制
发表时间：
2015
影响因子：
10.6
通讯作者：
Baocai Yin
中科院分区：
文献类型：
--
作者：
Yuping Wang;Lichun Wang;Dehui Kong;Baocai Yin
以低成本获取具有较大角分辨率和较高空间分辨率的光场是光场捕获的目标。组合或修改传统光学相机是设计光场捕获设备的常用方法，其中大多数模型都需要考虑角度和空间分辨率之间的权衡，而增加编码孔径通过复用来自不同视图的信息来避免这种考虑。在编码孔径的基础上，提出了一种改进的双测量单掩模光场相机模型。这两种压缩测量分别由编码孔径和随机卷积CMOS成像器实现，后者用作相机的成像传感器。单掩模设计允许高光效率，这使得采样图像具有高清晰度。双测量设计保留了更多的相关信息，有利于增强再现光场。采样的清晰度越高、相关性越强，重建光场的质量越高，在对重建光场的PSNR要求较低的情况下，重建光场的分辨率也越高。实验结果验证了该设计的优越性：与具有代表性的基于掩模的光场相机模型相比，该模型具有最高的重建质量和更高的光效率。
Acquiring light field with larger angular resolution and higher spatial resolution in low cost is the goal of light field capture. Combining or modifying traditional optical cameras is a usual method for designing light field capture equipment, among which most models should deliberate trade-off between angular and spatial resolution, but augmenting coded aperture avoids this consideration by multiplexing information from different views. On the basis of coded aperture, this paper suggests an improved light field camera model that has double measurements and one mask. The two compressive measurements are respectively realized by a coded aperture and a random convolution CMOS imager, the latter is used as imaging sensor of the camera. The single mask design permits high light efficiency, which enables the sampling images to have high clarity. The double measurement design keeps more correlation information, which is conductive to enhancing the reconstructed light field. The higher clarity and more correlation of samplings mean higher quality of rebuilt light field, which also means higher resolution under condition of a lower PSNR requirement for rebuilt light field. Experimental results have verified advantage of the proposed design: compared with the representative mask-based light field camera models, the proposed model has the highest reconstruction quality and a higher light efficiency.