Fig. 1. Schematic diagram of light field imaging principle.光场成像原理示意图

Fig. 2. Schematic diagram of X-ray light field imaging system.X射线光场成像系统模型示意图

Fig. 3. Projection data: (a) 64 random projection angles; (b) sinogram of some pixel image of projection in Fig.(a) under all angles.投影数据图　(a) 随机选取的64个投影角度; (b)图(a)中所有角度下的投影图中某一排像素图像组成的正弦图

Fig. 4. Digital refocus result: (a) Original Shepp-Logan phantom; depth slices where i line (b), ii line (c), iii line (d) and iv line (e) are located in Fig.(a).数字重聚焦结果　(a) Shepp-Logan模型; (a)中i线(b)、ii线(c)、iii线(d)和iv线(e)所在处的深度切片

Fig. 5. Digital refocus result after filtering by R-L filter: (a) Original Shepp-Logan phantom; depth slices where i line (b), ii line (c), iii line (d) and iv line (e) are located in Fig.(a).经R-L滤波器滤波后的数字重聚焦结果　(a) Shepp-Logan模型; (a)中i线(b)、ii线(c)、iii线(d)和iv线(e)所在处的深度切片