Laser underwater imaged image denoising and enhancing method for ocean exploration

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

Active Publication Date: 2015-05-27
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Laser underwater imaged image denoising and enhancing method for ocean exploration
  • Laser underwater imaged image denoising and enhancing method for ocean exploration
  • Laser underwater imaged image denoising and enhancing method for ocean exploration

Examples

Experimental program
Comparison scheme
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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 invention provides a laser underwater imaged image denoising and enhancing method for ocean exploration, and belongs to the field of image processing and pattern recognition. The core of the method is that at first, noise processing is performed on a laser underwater imaged image by applying SVD (singular value decomposition) and reconstruction in an airspace; then, aiming at the problem that the image has a little noise after SVD processing, wavelet decomposition and reconstruction are performed on the image in a wavelet domain to realize the purpose of wavelet denoising and enhancing; at last, FFT enhancing is performed on the image in a frequency domain to improve the image contrast and effectively keep the image resolution. Experiments show that the method can overcome a blocking effect due to equalization of local histogram equalization, and the image noise is effectively inhibited and the image resolution is kept under the premise that the image enhancement is realized.

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 Applications(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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