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High-quality integral videography using a multiprojector

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Abstract

Integral videography (IV) is an animated extension of integral photography. Despite IV’s many advantages, the quality of its spatial images has thus far been poor; the pixel pitch of the display and the lens pitch are considered to be the main factors affecting the IV image format. Our solution for increasing pixel density is to use multiple projectors to create a high-resolution image and project the resultant image onto a small screen by using long-zoom-lens projection optics. We manufactured a lens array for the display device, and here we present experimental results on using two SXGA projectors. The pixel pitch and lens pitch of the new display are 85 µm and 1.016 mm, respectively. The multiprojector IV display device has a spatial resolution of approximately 1, 2, and 3 mm for image depths of 10, 35, and 60 mm, respectively, in front of and behind the lens array.

©2004 Optical Society of America

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Figures (10)

Fig. 1.
Fig. 1. Principle of IV.
Fig. 2.
Fig. 2. System configuration of multiprojector IV display.
Fig. 3.
Fig. 3. Design and fabrication of microlens array. (a) Lens array is made of two lenticular sheets crossed at a right angle. (b) Fabricated lens array.
Fig. 4.
Fig. 4. High-resolution multiprojection IV display device. The display includes two projectors and mirrors for optical reflection.
Fig. 5.
Fig. 5. Schematic diagram of measuring IV image spatial resolution by projecting black and white stripes in different depths.
Fig. 6.
Fig. 6. Measured IV image spatial resolution. The numbers mean the image depths in front of (real IV image) and behind (virtual IV image) the lens array. The green part shows the real IV image of strips arranged in Fig. 5.
Fig. 7.
Fig. 7. Measured spatial resolutions of real and virtual IV images.
Fig. 8.
Fig. 8. Elemental image of IV rendering results. (a) Calculated entire elemental image of human heart; (b) Enlarged image of the yellow part in (a).
Fig. 9.
Fig. 9. (1.2MB) Movie of multiprojector IV Image (human heart) observed from different viewing directions.
Fig.10.
Fig.10. (1.3MB) Movie of IV CT autostereoscopic animated image of human heart. The patient has a heart rate of 63 beats per minute, i.e. a cardiac cycle of 0.95s.

Tables (1)

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Table 1 Main specifications of multiprojection IV display

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