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Underwater light field intervention imaging method

An imaging method and light field technology, applied in the re-radiation of electromagnetic waves, the use of re-radiation, measurement devices, etc., can solve the problems of localization, rough underwater light field distribution, and inability to adjust light source parameters intelligently, etc. The effect of backscatter minimization

Pending Publication Date: 2021-10-08
OCEAN UNIV OF CHINA
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Problems solved by technology

The inability to intelligently adjust the light source parameters leads to rough or localized distribution of the underwater light field, which is a key issue for the above systems to improve the contrast of target details

Method used

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  • Underwater light field intervention imaging method
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  • Underwater light field intervention imaging method

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0047] The pixel at the position (i, j) in the imaging space does not have an infinitely small area, and its corresponding one in the world coordinate space is such as figure 1 The quadrangular pyramid shown here is called "pixel pyramid, abbreviated as pp), and the pixel pyramid will be indexed using pixelIndex=(i, j) in the entire system. figure 2 Shows the corresponding relationship between a pixel cone and a beam set: According to the spatial geometric relationship, for such as figure 2 In the geometric layout of the light field shown, any pixel cone will intercept a fan-shaped light-emitting surface in the beam divergence cone EFGH-L1 of the light source, as shown in figure 2 The triangular fan W in . There are several beam objects contained in the fan, and we define the set of these beams truncated by the pixel cone as "pixel cone beam set, pyramid...

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Abstract

The invention relates to the field of underwater imaging, in particular to an underwater light field intervention imaging method, which is characterized by comprising the following steps of: A, initializing system parameters; B, carrying out pixel and light beam object initialization; C, performing fuzzy compensation type floodlighting; D, selecting a lighting area through manual interaction; E, carrying out region light field generation; and F, carrying out region light field calculation imaging. According to the underwater light field intervention imaging method provided by the invention, fine control of light field energy space distribution can be realized, which is mainly embodied in two aspects: the presence or absence of illumination energy in a space area is finely controlled; and according to the absorption attenuation parameter of a water body and the spatial coordinate attribute of an illumination area, targeted distribution of illumination energy is carried out on the area needing illumination, and long-distance strong light field distribution compensation and short-distance weak light field backscattering minimization are realized.

Description

technical field [0001] The invention relates to the field of underwater imaging, in particular to an underwater light field intervention imaging method. Background technique [0002] Traditional underwater photoelectric detection and imaging usually build ordinary underwater light sources to achieve static projection of underwater light field energy distribution, which belongs to coarse-grained energy control; once the light field is built, its depth of field, detection distance, and viewing angle cannot be changed. This has resulted in an increase in system power consumption, volume, and weight, and will also lose certain image details. Another requirement for underwater target observation in a dynamic ocean environment is to achieve fine-grained imaging of close-range targets, that is, high-contrast, texture-detailed imaging, which is of great importance in applications such as dam crack maintenance, sea cucumber pest control, and underwater archaeology. effect. In this ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/89
CPCG01S17/89
Inventor 郑冰孙梦楠付民王晓晓
Owner OCEAN UNIV OF CHINA
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