A Computational Hologram Generation Method for 3D Point Cloud Model

A technology for computing holograms and three-dimensional point clouds, which is applied in the field of computing holography, can solve the problems of slow computing speed, large memory space, and large amount of computing holograms, so as to improve the generation speed, avoid storage space, and reduce the amount of computing Effect

Active Publication Date: 2018-01-16
HUIZHOU FRONT OPTOELECTRONIC TECH CO LTD
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for generating a computational hologram of a three-dimensional point cloud model, which can solve the problems of large amount of calculation and slow calculation speed for generating a computational hologram based on the point source method, and can avoid the impact of the look-up method on the hardware. Problems that take up a lot of memory space

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  • A Computational Hologram Generation Method for 3D Point Cloud Model
  • A Computational Hologram Generation Method for 3D Point Cloud Model
  • A Computational Hologram Generation Method for 3D Point Cloud Model

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Embodiment Construction

[0023] The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.

[0024] When the hologram is calculated and generated based on the point source method, the visual object is composed of many point light source points, and each object point independently emits spherical waves, and the light field propagated to the hologram plane by each object point is calculated separately, and finally all are superimposed The light field of the object point, generating a hologram.

[0025] The light field on the holographic plane calculated by the traditional point source method can be expressed as:

[0026]

[0027] In formula (1), (x i ,y i ) is the coordinate of the hologram plane, (x j ,y j ,z j ) is the coordinate of the jth point light source, x ij =x i -x j ,y ij =y i -y j , k is the wave number, N is the number of point light sources that make up the object, A j is the amplitude of e...

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Abstract

The invention discloses a method for generating a computational hologram of a three-dimensional point cloud model, comprising: (1) reading the original three-dimensional coordinate data of each object point in the three-dimensional point cloud model, and numbering each object point; The Z coordinate of an object point is added with a predetermined hologram recording distance; (3) the Z coordinates of each object point are used as the main cycle condition, and a two-dimensional blank surface is established for each cycle; (4) all object points are traversed, and the The object points whose Z coordinates are equal to the Z coordinates of the object point of the current cycle are found one by one, and correspondingly mapped to the two-dimensional blank surface to generate a two-dimensional surface containing point cloud model information; (5) the two-dimensional surface The method based on FFT is used to calculate the corresponding light field on the holographic plane; (6) Repeat (3)-(5) to superimpose the light fields obtained in each cycle to obtain a calculated hologram. The application of the invention can reduce the amount of calculation for calculating the hologram, and avoid the large amount of time consumed by the point source method and the extra storage space brought by the look-up table.

Description

technical field [0001] The invention relates to the field of computational holography, in particular to a method for generating a computational hologram of a three-dimensional point cloud model. Background technique [0002] In recent years, three-dimensional (3d) displays have become increasingly more popular. Compared with other stereoscopic display technologies, holographic display technology can not only provide horizontal and vertical parallax, but also give people a sense of depth. It is a true three-dimensional display technology. Compared with traditional optical holography, computational holography can not only display real objects, but also virtual objects simulated by software. However, computational holograms also have disadvantages. One of the main disadvantages is the large amount of calculation, which leads to slow generation of computational holograms, and it is difficult to realize real-time dynamic reproduction. [0003] In order to realize the real-time ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
Inventor 苏萍曹文波马建设程炳超
Owner HUIZHOU FRONT OPTOELECTRONIC TECH CO LTD
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