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Underwater image restoration method

An underwater image and channel technology, applied in the fields of computer vision and image processing, can solve the problem of ill-posed underwater image restoration, and achieve the effects of natural and clear restoration results, improved visual quality, and fast processing speed.

Inactive Publication Date: 2017-04-26
TIANJIN UNIV
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Problems solved by technology

Although underwater image restoration has received extensive attention in recent years, underwater image restoration is still a challenging ill-posed problem

Method used

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Embodiment Construction

[0030] The invention designs an underwater image defogging algorithm based on the degradation mechanism of the underwater image, and combines it with the grayscale world color constant algorithm to invent an underwater image restoration method. The present invention dehazes the blue (b) and green (g) channels of the degraded underwater image according to the underwater imaging data model. The constant algorithm is corrected. The specific technical scheme is described in detail as follows:

[0031] 1 blue-green channel to defog

[0032] The underwater imaging mathematical model can be expressed as:

[0033] I c (x)=J c (x)t(x)+B c (1-t(x)), c∈{r,g,b}

[0034] In the formula, I c (x) is the degraded underwater image, J c (x) is the restored underwater image, B c is the background light, and t(x)∈[0,1] is the medium transmittance. In order to recover a clear underwater image, it is crucial to accurately estimate the medium transmittance and background light. According ...

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Abstract

The invention belongs to the technical field of image processing and computer vision, combines an image defogging algorithm and a color constancy algorithm, and proposes a method capable of effectively restoring underwater image visual quality. The technical scheme adopted by the invention is that the underwater image restoration method includes the steps of performing defogging processing on degraded blue and green channels of an underwater image according to an underwater imaging data model, and correcting a degraded red channel on the basis of the restored pixel values of the blue and green channels according to a gray scale world color constancy algorithm. The underwater image restoration method provided by the invention is mainly applied to an image processing occasion.

Description

technical field [0001] The invention belongs to the technical fields of image processing and computer vision, and relates to an underwater image restoration method. Background technique [0002] The underwater world contains abundant resources, but it is affected by light absorption and scattering, and underwater images often have visual degradation problems such as color deviation, low contrast and blur. Therefore, research on algorithms related to underwater image enhancement and restoration will help to develop, explore, and protect the marine world using image processing and computer vision technologies. Among them, underwater image restoration is to adjust the pixel value of the image through mathematical calculation, and the purpose is to restore the original appearance of the underwater image. Underwater image restoration technology plays a vital role in the fields of underwater image research and industry. For example, in the monitoring of the marine ecological env...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/20024G06T2207/10024G06T2207/20216G06T5/77
Inventor 郭继昌李重仪郭春乐顾翔元
Owner TIANJIN UNIV
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