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A Noise Removal and Enhancement Method for Laser Underwater Imaging Image Used in Ocean Exploration

An image and laser technology, used in image enhancement, image data processing, instruments, etc., can solve problems such as large noise and blurred images, and achieve the effect of overcoming block effect and improving image contrast.

Active Publication Date: 2018-03-13
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can overcome the block effect caused by the local histogram method, solve the problem of large noise and image blur caused by image enhancement, and is widely used in ocean detection

Method used

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  • A Noise Removal and Enhancement Method for Laser Underwater Imaging Image Used in Ocean Exploration
  • A Noise Removal and Enhancement Method for Laser Underwater Imaging Image Used in Ocean Exploration
  • A Noise Removal and Enhancement Method for Laser Underwater Imaging Image Used in Ocean Exploration

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Embodiment

[0051] Embodiment: the computer simulation analysis of the inventive method

[0052] Figures 3-1 to 3-4 It is a comparison chart of the effect of different denoising and enhancement methods for 4 real laser underwater imaging images; in each group of comparison pictures (a) is the original image, (b) is the local histogram method denoising and enhancement image, (c) denoises and enhances the image by the wavelet method, and (d) denoises and enhances the image by the method of the present invention.

[0053] We can see that the method of the present invention effectively solves the problems of low contrast and obvious noise of laser underwater imaging images. Compared with the local histogram method and the wavelet method, the method of the present invention effectively overcomes the block effect caused by the local histogram method, solves the problems of large noise and image blur caused by image wavelet enhancement, and effectively suppresses image distortion while realizi...

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Abstract

The present invention proposes a method for denoising and enhancing laser underwater imaging images for marine detection, which belongs to the field of image processing and pattern recognition. Noise processing is performed on the image; secondly, in view of the problem that some noise still exists in the image after SVD processing, wavelet decomposition and reconstruction are performed on the image in the wavelet domain to achieve the purpose of wavelet denoising and enhancement; finally, FFT is performed on the image in the frequency domain Enhance, improve image contrast and effectively maintain image clarity. Experiments show that the method of the invention can effectively overcome the block effect caused by local histogram equalization, realize image enhancement, effectively suppress image noise and maintain image clarity.

Description

technical field [0001] The invention belongs to the fields of image processing and pattern recognition, and in particular relates to a laser underwater imaging image denoising and enhancement method for ocean detection. Background technique [0002] With the rapid economic development and population growth, people are paying more and more attention to the ocean, which is rich in resources. The development of marine resources and the exploration of ocean laws are of great significance to the country's national economy and military security. At present, laser underwater imaging technology is widely used in military fields such as exploration of marine resources, monitoring of marine ecology, mine-laying, and submarine rescue. However, due to the strong transmission attenuation caused by the scattering and absorption of seawater to the laser, the laser energy decreases rapidly with the increase of seawater depth, while the backscattered light and forward scattered light form ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 龚卫国陈雪梅陈魏然杨利平李伟红
Owner CHONGQING UNIV
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