01-02-2013, 02:57 PM
LIGHT-FIELD GENERATION BY SEVERAL SCREEN TYPES FOR GLASSES-FREE TABLE TOP 3D DISPLAY
[attachment=49251]
ABSTRACT
We propose a glasses free 3D display, named f vision, which floats virtual 3D object on a flat table top surface. The approach employs a combination of an optical device and circularly arranged projector array. It reproduces light field optimized for a seated condition at a certain volume and forms a ring shaped viewing area. In this principle ,the optical device must control the travelling direction of numerous rays passing the volume. An appropriate algorithm for supplying source image for the projector array should also be considered.
This paper introduces several approaches for fabricating a variety of these optical devices in different shapes. Those devices work like a special screen by applying an anisotropic diffusion characteristics. We then propose an algorithm that generate source images and describe an implementation method for the 3d display as a system. The algorithm is confirmed from several 3D images generated by the system
For generation of the 3D images , fvisiOn employs a newly developed special optical device as a screen and a series of micro projectors arranged circularly. The combination of those devices produces a light field in a certain volume on the table. The light field represent a bench of directional rays radiated from surfaces of objects which are assumed to be on a table. The light field of our method is optimized for observing in seated condition. In other words, the fvision’s viewing area occupies an oblique position above the table. Additionally, our entire 3D imaging mechanism is installed underneath the table. It keeps the table top area clear and does not disturb collaborative work and natural communications. For example, fvisiOn can display virtual 3D images beside printed documents and physical mock-ups.
The developed system is prototype to validate a 3D generation principle we proposed. It employs a conical-shaped optical device and over 100 projectors, and covers the viewing area of approximately 130 degree around the table, though it is 1/3 of ideal implementation. This primal prototype can float the 3D image of a height of approximately 5cm on the table top like a centerpiece in the center of the table
[attachment=49251]
ABSTRACT
We propose a glasses free 3D display, named f vision, which floats virtual 3D object on a flat table top surface. The approach employs a combination of an optical device and circularly arranged projector array. It reproduces light field optimized for a seated condition at a certain volume and forms a ring shaped viewing area. In this principle ,the optical device must control the travelling direction of numerous rays passing the volume. An appropriate algorithm for supplying source image for the projector array should also be considered.
This paper introduces several approaches for fabricating a variety of these optical devices in different shapes. Those devices work like a special screen by applying an anisotropic diffusion characteristics. We then propose an algorithm that generate source images and describe an implementation method for the 3d display as a system. The algorithm is confirmed from several 3D images generated by the system
For generation of the 3D images , fvisiOn employs a newly developed special optical device as a screen and a series of micro projectors arranged circularly. The combination of those devices produces a light field in a certain volume on the table. The light field represent a bench of directional rays radiated from surfaces of objects which are assumed to be on a table. The light field of our method is optimized for observing in seated condition. In other words, the fvision’s viewing area occupies an oblique position above the table. Additionally, our entire 3D imaging mechanism is installed underneath the table. It keeps the table top area clear and does not disturb collaborative work and natural communications. For example, fvisiOn can display virtual 3D images beside printed documents and physical mock-ups.
The developed system is prototype to validate a 3D generation principle we proposed. It employs a conical-shaped optical device and over 100 projectors, and covers the viewing area of approximately 130 degree around the table, though it is 1/3 of ideal implementation. This primal prototype can float the 3D image of a height of approximately 5cm on the table top like a centerpiece in the center of the table