# Full-Parallax Multiview Generation with High-Speed Wide-Angle Dual-Axis Scanning Optics
## 3 Integrated View in the Integrated Viewing Zone  
In the full-parallax multiview system, the observation is examined experimentally and the feasibility of the WDF analysis is verified. The views are synthesized experimentally at three different positions. At the SVZ, only a single view is observed, as expected. At the IVZ, the integrated view is observed, which comprises vignetted views. Outside of the VZ, the captured image is vignetted, despite synthesizing all views. Figure 6 shows the experimental setup for observation analysis. The setup comprises a light engine, which has three DMDs for full-color content. After passing through the optics for controlling the width of SVZ, the image passed through a dual-axis scanner. In this experiment, we examined the vignetting of views individually and the integration with other views. The rotation stages are used to rotate scanning mirrors manually and every image is captured at a fixed scanning angle. We generated 9 by 9 SVZs--nine horizontal and nine vertical SVZs. The width of each SVZ was 2 mm, and a scanning angle step-size of 0.85\({}^{\circ}\) was used in the experiment. Figure 7 shows the target captured images at the second eye position. Figure 7 shows the target image with five billiard balls located at different depths. As the second eye position is at the reference viewing distance, the captured image is almost identical to the target image, as shown in Figure 7.  
Figure 5: Wigner distribution function (WDF) analysis of the proposed system. (**a**) WDF of each SVZ on the DMD plane; (**b**) propagated WDF at the viewing distance. Next, the integration of vignetted views at two different observation positions are experimentally analyzed. For this analysis, 9 by 9 images are captured, and the integrated view is then synthesized via image processing. Observations are made from the fourth and fifth eye positions. In the experiment, the fourth eye position is 375 mm, and the fifth eye position is 525 mm from the center of the ball lens. Figure 8a shows 3 by 3 out of 9 by 9 captured images at the fourth eye position. Each view is vignetted and the positions of the circle of vignetting are different from each other, as expected. Figure 8b shows the integrated view obtained by integrating all 9 by 9 vignetted views. Here, the white ring indicates the circle of vignetting for an individual view. The positions of the rings are equally spaced according to the order of the view. The overlaps between adjacent rings also appear in the integrated view. Figure 8c shows 3 by 3 out of 9 by 9 captured views at the fifth eye position. These results appear identical to those in Figure 8a because each  
Figure 6: Experimental setup for observation analysis. Figure 7: Single view at the second eye position of \(e_{2}\). (**a**) Target image; (**b**) captured image. view is vignetted in a circular shape. However, there is a significant difference because the size of the circle is relatively small, and the shift of the circle is less. This difference is apparent when the integrated view in Figure 8d is compared with that in Figure 8b. Notably, the integrated view in Figure 8d is vignetted despite the synthesis of all 9 by 9 captured views. Specifically, the visible area in the integrated view decreases as the eye position at the maximum viewing distance increases. The results of this experiment can be conveniently interpreted using WDF analysis. Figure 9 presents the WDFs of the views at the fourth and fifth eye positions. As mentioned previously, the circles of vignetting overlap each other at the fourth eye position. Each view is vignetted by the WDF of the observation, as shown in Figure 9a. Here, each view is slanted such that it overlaps the adjacent view along the spatial frequency axis. By contrast, the circle of vignetting at the fifth eye position is relatively small. In Figure 9b, each view is more slanted compared to the previous case. Therefore, the interval between the views along the spatial frequency axis is small.