基于光场的两平行平面表示方法, 针对光场相机两参考平面间的共轴空间距离变换、离轴空间距离变换、轴旋转和沿轴旋转以及透镜作用等对光线描述方式的影响, 给出了相应的光场矩阵变换方程, 并利用这些方程, 建立了光场相机的成像模型、采样模型及辐射传输模型.从光场共轴空间距离变换的观点出发推导出可实现不同点清晰成像的数字重聚焦公式.利用所建立的模型, 计算机仿真生成了目标景物, 并用所建立模型对生成景物进行了数字重聚焦, 验证了数字重聚焦后的图像与直接聚焦图像的一致性.

Based on the double plane representation of the light field, aimed at the effect of light on the way of description influenced by coaxial translation, off-axis translation, coplanar rotation and off-planar rotation, and lens transformation between two reference plane of light field camera, this paper provided the corresponding matrix transformation equations. And using the transformation equations, the imaging model, sampling model, and radiation model of light field camera are established. Besides, on the view of light field coaxial space distance transformation, the digital refocusing process is deduced which can receive clearly imaging in any target scene point after got the imaging by focusing at a point. And moreover, by using the established model, the object is generated by computer simulation, and the model is used for digital refocusing on generation of features, the consistency of digital refocusing image and the directly focused images are verified.