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Rapid computer-generated holography algorithm based on trigonometric function look-up table

A trigonometric function and fast calculation technology, applied in the field of computational holography, can solve the problems of reducing repeated data in calculation and taking up a large amount of memory for lookup tables, and achieve the effect of reducing repeated data in calculation, reducing memory, and speeding up

Inactive Publication Date: 2015-02-18
ACADEMY OF ARMORED FORCES ENG PLA
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Problems solved by technology

[0006] 1 It has the advantages of other lookup table algorithms to reduce the calculation of repeated data, and effectively solves the problem that other lookup tables occupy too much memory

Method used

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  • Rapid computer-generated holography algorithm based on trigonometric function look-up table
  • Rapid computer-generated holography algorithm based on trigonometric function look-up table
  • Rapid computer-generated holography algorithm based on trigonometric function look-up table

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Embodiment Construction

[0015] The "new table look-up algorithm for fast calculation of three-dimensional object hologram" of the present invention will be further described below in conjunction with the accompanying drawings and attached tables.

[0016] figure 1 The flow chart of T-LUT algorithm derivation provided by the present invention.

[0017] The preliminary mathematical expression of the point source method is:

[0018] I ( x h , y h ) = Σ j = 0 N - 1 A j cos [ 2 π λ Δx 2 + Δy 2 ...

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Abstract

The invention belongs to the field of computer-generated holography and particularly relates to a rapid computer-generated holography algorithm based on a trigonometric function look-up table. The rapid computer-generated holography algorithm is characterized in that based on computer-generated holography through a point source method, the trigonometric function look-up table deduces an original formula and simplifies the phase position part related to redundancy computation through mathematical approach transformation and trigonometric function identical transformation so as to generate two phase position look-up tables containing depth information. The generative process adopts parallel computing, is high in speed and accuracy, and contains all phase position information of objects (including three-dimensional and two-dimensional objects); in addition, the internal memory usage is less, the repeated utilization factor is high, and the application range is wide. Moreover, the parallel optimization is performed on the algorithm, parallel computing is adopted during the table look-up addressing and computing processes, and the computer-generated holography speed is effectively accelerated.

Description

technical field [0001] The invention belongs to the field of computational holography, and in particular relates to a fast computational holographic algorithm based on a trigonometric function lookup table. Background technique [0002] Although computational holography can comprehensively apply computer technology and holographic technology to obtain a good three-dimensional display effect, the spatial bandwidth product of holograms is very large, which brings huge pressure on the computing speed and storage capacity of computers, restricting computing power. Real-time computational transmission and display of holograms. The point source method is a classic computational holographic algorithm, and the problem of slow calculation speed is extremely prominent when the point source method is used to calculate the hologram of a three-dimensional object. The point source calculation holographic algorithm (Ray-tracing) completely simulates the physical process of optical hologra...

Claims

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Application Information

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IPC IPC(8): G06F1/035
CPCG06F1/035
Inventor 蒋晓瑜丛彬裴闯闫兴鹏赵锴严志强赵哲
Owner ACADEMY OF ARMORED FORCES ENG PLA
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