Three-dimensional digital holography photon map

Abstract

The invention belongs to the field of three-dimensional geographic information display and particularly relates to a holography photon map for displaying a three-dimensional terrain. The holography photon map is composed of a reproducing light source and a hologram recording medium. Specifically, three-dimensional terrain information is obtained through a terrain data collecting system, and three-dimensional data of the terrain is reconstructed by adopting a motion recovery structure algorithm SfM. A three-dimensional terrain hologram is calculated on the basis of a reverse diffraction calculation holographic technology and a diffraction unit lookup table algorithm. The hologram is written into the recording medium, and the photon map is formed. The three-dimensional photon map can display spatial three-dimensional characteristics of the terrain, three-dimensional map display effects of all view angles, multiple angles and high precision are achieved, and the photon map has a data plotting indication function simultaneously and overcomes the shortcoming that an existing map cannot accurately and visually display three-dimensional terrain information.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional geographic information display and calculation holography, and in particular relates to a digital holographic photon map capable of displaying three-dimensional topography. Background technique [0002] In recent years, with the steady development of social economy and the improvement of people's living standards, new requirements have been put forward for the perception of spatial geographic information in practical applications. No matter in military battlefield precision strikes and urban anti-terrorism, or in daily life traffic congestion relief and geographic information navigation, full parallax, multi-angle naked-eye real 3D terrain information maps have become an urgent need for people. Currently known cartography is a two-dimensional cartography. For example, conventional paper and electronic maps are only representations of terrain information on a plane, lacking three-dimensi...

AI Technical Summary

Problems solved by technology

For example, conventional paper and electronic maps are only representations of terrain information on a plane, lacking three-dimensional representation of terrain and a three-dimensional sense of space; and the recent rapid development of three-dimensional virtual electronic maps uses perspective relationships to display three-dimensional geographic information on the screen. The two-dimensional projected image in the angle of view lacks three-dimensional intuition, which reduces the comfort of human eye observation, and due to projection and perspective calculations, ground objects have display errors, which also cannot effectively meet the needs of technological development for accurate display of three-dimensional geographic information

[0003] In terms of 3D holographic maps, the Mark Lcucente group of the MIT Media Lab proposed a spatial light field reconstruction method based on Hogel technology. Since the real part of the complex amplitude of the light field is used as the basic diffraction fringe, there are conjugates in the reproduction process. image interference; the US Zebra Imaging company has realized the holographic map of the 3D model, but its technical details have never been disclosed

At the same time, this technology has not been reported in the literature in China.

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