## 4 Experimental Verification  
An LCD panel was used for exposing holographic stereogram, for convenience in calculation, the corresponding resolution on 1 cm \(\times\) 1 cm display area of LCD panel was 100 \(\times\) 100 pixels. To this end, the Panasonic LCD panel (VVX09F035M20) had been selected, its size was 8.9 inches, and the resolution was \(1920\times 1200\). Select 10 cm \(\times\) 10 cm area in the center of LCD panel as the effective display area. Thus, the resolution of the synthetic perspective image for exposure is 1000 \(\times\) 1000 pixels. A mapped teapot model is used as the 3D scene. The depth was 4.8 cm, the height was 3 cm, the width was 4.2 cm, and it was tipped 40\({}^{\circ}\). Let \(k=1\), \(l_{1}=l_{2}=0.2\) cm, \(L_{1}=L_{2}=18.6\) cm. A camera was set in front of the teapot, and the FOV was 30\({}^{\circ}\). The size of H\({}_{2}\) plate was 6 cm \(\times\) 6 cm, \(n_{H_{2}}=30\), and the hogel number of H\({}_{2}\) plate was \(30\times 30=900\). According to the previous formula, \(n_{H_{1}}=126\), the number of the camera position should be \(126\times 126=15\),876. As shown in Figure 9, the synthetic perspective images of the holographic element-based EPISM method are given, image(\(6,16\)) is the synthetic perspective image corresponding to the order number of the sixth row and the sixteenth column's hogel on H\({}_{2}\) plate. As EPISM methods, the synthetic perspective images are pseudoscopic images, and the reconstructed scene can reproduce the recording scene truthfully in correct depth. Figure 8: Diagram of effective perspective images segments. As shown in Figure 10, the optical setup using for holographic-based EPISM method holographic stereogram is presented. A 639 nm custom-made red laser was used as the laser source for holographic stereogram printing. The max power of laser source was 1.2w. An electric shutter was used to control the exposure time. Its model was Sigma Koki SSH-C2B. The direction of laser beam was changed by a reflector. A non-polarizing beam splitter(NPBS) was set in the new direction of the laser beam, and the laser beam was divided into two laser beams perpendicular to each other. The laser beam vertical to the original direction was denoted as signal beam, and the laser beam in the same direction as the original direction was denoted as reference beam. An attenuator was set in the same direction of signal beam to adjust the intensities, and a spatial filter was used to expand the signal beam. The LCD panel introduced earlier was used to load the synthetic perspective image, a diffuser was used to scatter the signal beam to the hogel aperture, and the diffuser was placed close to the LCD panel. The reference beam direction was changed by a reflector, and an attenuator was used to adjust the intensities of the reference beam. Another reflector was used to change the reference beam to the backside of holographic plate, and a spatial filter was used to expand the reference beam. Then, the expanded beam was changed into a uniform plane wave by a collimating lens; the focal length of the lens is 75 mm. A manual ultrafine silver-halide plate for He-Ne laser was used as holographic plate; its grain size was about 10-12 nm. The holographic plate placed 18.6 cm away from LCD panel, two diaphragms with apertures are placed on both sides of the LCD panel, the signal beam and reference beam passing through the aperture interfere on the holographic plate to generate hogel. A X-Y motorized stage(KSA300, MC600) was used to carry the holographic plate; it can move both on the horizontal and vertical rail. The step of the X-Y motorized stage was \(l_{2}\). A computer was used to time-synchronously control the shutter, the LCD panel, and the motorized stage. Figure 9: Synthetic perspective image of the holographic element-based EPISM methods.