Fig. 1. Schematic of hologram generation algorithm. (a) Point source algorithm; (b) ray-tracing algorithm

Fig. 2. Structural diagram of OptiX ray-tracing program

Fig. 3. Principle of ray-tracing hologram generation algorithm

Fig. 4. Flow chart of ray-tracing hologram generation algorithm

Fig. 5. Optical path for reconstruction experiment

Fig. 6. 3D model and optical reconstructed images at different distances. (a) Polygon model image; reconstructed images by ray-tracing algorithm at (b) 95mm and (c) 105mm away from hologram plane; (d) point cloud model image; reconstructed images by point cloud algorithm at (e) 95mm and (f) 105mm away from hologram plane

Table 1. Comparation of computing power between CPU and GPU

Table 2. Experimental specifications of holograms

Table 3. Running time of ray-tracing algorithm for 3D models with different sizes unit: s

Table 4. Running time of each algorithm unit: s