Underwater water noise removal calculation three-dimensional imaging method and system

A technology for removing noise and water bodies, applied in the field of 3D imaging method and imaging system for underwater noise calculation of water bodies, can solve the problems of reducing image signal-to-noise ratio and contrast, reducing the distance resolution of 3D images, etc., to achieve good environmental adaptability, good The denoising effect of water bodies and the effect of denoising and reconstruction of 3D images

Pending Publication Date: 2020-08-07
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

Although range-gated imaging can suppress the influence of noise such as backscattering of the water body between the space slice and the system through spatial slices, and improve the working distance and image quality, there are still t

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  • Underwater water noise removal calculation three-dimensional imaging method and system
  • Underwater water noise removal calculation three-dimensional imaging method and system
  • Underwater water noise removal calculation three-dimensional imaging method and system

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[0038] The invention discloses a three-dimensional imaging method for calculating underwater noise in the underwater body. A pulsed laser is used for underwater illumination, a gated image sensor is used to collect image information, and reference water body noise can be obtained by controlling the delay between the laser pulse and the gated imaging device Figure, interest information frame image, and obtain the background noise map of the system by turning off the laser, and then calculate the water depth noise map, use the difference between the interest information frame image and the water depth noise map to obtain the denoised information frame image, and finally use the distance energy The relevant algorithm realizes the three-dimensional reconstruction of the water body noise. By obtaining the depth noise map of the water body, the present invention can accurately denoise the target and non-target areas in the underwater gated image, obtain a denoised two-dimensional imag...

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Abstract

The invention discloses an underwater water noise removal calculation three-dimensional imaging method. The method comprises the steps of using a pulse laser for underwater illumination; adopting a gating image sensor to collect the image information; obtaining a reference water body noise map and an interested information frame image by controlling the delay between the laser pulse and the gatingimaging device; obtaining a background noise map of a system by turning off a laser, then obtaining a water body depth noise map through calculation, obtaining a denoised information frame image through the difference between the interested information frame image and the water body depth noise map, and finally realizing the three-dimensional reconstruction of denoised water body noise through adistance energy correlation algorithm. According to the method, by obtaining the water body depth noise map, a target-containing area and a target-free area in the underwater gating image can be accurately denoised, the denoised two-dimensional image is obtained, and the denoised three-dimensional image is obtained through further calculation, so that the method has the advantages of being good inadaptability and high in practicability.

Description

technical field [0001] The invention relates to the technical field of underwater optical imaging, in particular to a three-dimensional imaging method and imaging system for calculating underwater body noise. Background technique [0002] At present, mankind has entered a period of large-scale development and utilization of the ocean, setting off a new round of ocean development around the expansion of blue land space, exploration of seabed mineral resources, assessment of marine life and fishery resources, development of marine natural products, and sea-related civil engineering projects. The key to competition is the competition of marine cognitive abilities. Underwater detection is a key technology to understand the ocean, especially the imaging technology that can visually display the shape of the target. Compared with sonar imaging, underwater optical imaging can obtain intuitive and high-resolution images, which is conducive to the detection and identification of subm...

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Application Information

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IPC IPC(8): G01S17/88
CPCG01S17/88
Inventor 王新伟王敏敏周燕
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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