Light ray field capture using focal plane sweeping and its optical reconstruction using 3D displays.

We propose a method to capture light ray field of three-dimensional scene using focal plane sweeping. Multiple images are captured using a usual camera at different focal distances, spanning the three-dimensional scene. The captured images are then back-projected to four-dimensional spatio-angular space to obtain the light ray field. The obtained light ray field can be visualized either using digital processing or optical reconstruction using various three-dimensional display techniques including integral imaging, layered display, and holography.

Hologram synthesis of three-dimensional real objects using portable integral imaging camera.

We propose a portable hologram capture system based on integral imaging. An integral imaging camera with an integrated micro lens array captures spatio-angular light ray distribution of the three-dimensional scene under incoherent illumination. The captured light ray distribution is then processed to synthesize corresponding hologram. Experimental results show that the synthesized hologram is optically reconstructed successfully, demonstrating accommodation and motion parallax of the reconstructed three-dimensional scene.

Depth enhancement of multi-layer light field display using polarization dependent internal reflection.

A technique to enhance the depth range of the multi-layer light field three-dimensional display is proposed. A set of the optical plates are stacked in front of the conventional multi-layer light field display, creating additional internal reflection for one polarization state. By switching between two orthogonal polarization states in synchronization with the displayed three-dimensional images, the depth range of the display can be doubled. The proposed method is verified experimentally, confirming its feasibility.

Acceleration of integral imaging based incoherent Fourier hologram capture using graphic processing unit.

Speed enhancement of integral imaging based incoherent Fourier hologram capture using a graphic processing unit is reported. Integral imaging based method enables exact hologram capture of real-existing three-dimensional objects under regular incoherent illumination. In our implementation, we apply parallel computation scheme using the graphic processing unit, accelerating the processing speed. Using enhanced speed of hologram capture, we also implement a pseudo real-time hologram capture and optical reconstruction system. The overall operation speed is measured to be 1 frame per second.