Light field 3D display can reconstruct 3D scenes in space through light modulation devices. All the information required for light field reconstruction is provided by an image called 3D content. However, the procedure of 3D content acquisition is complex. With increased viewpoints and higher resolution of the light field 3D display, a real-time 3D acquisition is difficult to achieve. In this paper, a real-time 3D acquisition method for light field 3D display based on the calculated depth map is proposed and a real-time 3D acquisition system is also developed. The average frame rate of the presented system is 13.66 frames per second with a resolution of 3840×2160 pixels.
KEYWORDS: 3D displays, Cameras, 3D image processing, 3D modeling, Image resolution, 3D image reconstruction, Matrices, LCDs, Affine motion model, Prototyping
Light field 3D display is a glasses-free 3D display that samples and reconstructs the light field guided by ray optics. To increase the density of the discrete viewpoints, parallax images in more than tens or even hundreds of directions should be sampled, which adds up to computation and slowdowns the generation speed of the 3D image source. In this paper, a fast generation method for 3D image source based on instancing camera rendering is proposed, which greatly optimizes the speed of the parallax image rendering process in light field 3D display. Experimental results reveal that the proposed method can generate the 4K and 8K light field 3D image sources at over 60 frames per second (fps) with viewpoints less than 160 and 80, respectively, performing at least 106% and 94% faster than the conventional non-instancing method.
We propose an integral imaging tabletop three-dimensional (3D) display system. The system uses a dynamic tilted barrier array combined with a high-brightness two-dimensional display panel and lens array to provide tabletop 3D images with a complete 360° viewing zone. Besides, we propose a high-efficient elemental image array (EIA) generation method based on the backward ray-tracing technique for the integral imaging tabletop 3D display system. The EIA can be obtained in one rendering step by calculating the backward rays from all viewpoints to the corresponding pixels of the EIA. The experimental results verify the feasibility of the integral imaging tabletop 3D display system and the high-efficient EIA generation method.
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