Underwater image enhancement method based on color correction and contrast stretching

A color correction and underwater image technology, which is applied in the field of image processing, can solve the problems of detail information and color information cannot be better, enhanced, and maintain color recovery, etc.

Active Publication Date: 2019-11-29
DALIAN MARITIME UNIVERSITY
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  • Summary
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AI Technical Summary

Problems solved by technology

Histogram stretching can only improve the contrast of the image alone, but cannot enhance the detail information and color information of the image well, and the color constant method can not enhance the underwater image well while maintaining the color restoration. The contrast has also been improved. The fusion method is to integrate multiple enhancement or reduction techniques to solve multiple problems at the same time. This method has received attention in recent years.

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  • Underwater image enhancement method based on color correction and contrast stretching
  • Underwater image enhancement method based on color correction and contrast stretching
  • Underwater image enhancement method based on color correction and contrast stretching

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Embodiment

[0057] In order to verify the effectiveness of the underwater image enhancement of the present invention, the underwater images of different scenes are selected as the test set, and the experimental results of the Ancuti algorithm, the Drews algorithm, the Peng algorithm, the Fu algorithm, the Peng algorithm, and the Berman algorithm are analyzed qualitatively and quantitatively. aspect for comparative analysis. The specific steps and principles are as follows:

[0058] Such as figure 1 As shown, the present invention provides a kind of underwater image enhancement method based on color correction and contrast stretching, comprising the following steps:

[0059] S1. Acquire the original underwater image. In order to solve the color cast of the underwater image, perform color compensation on the acquired original underwater image; the specific formula is:

[0060]

[0061] Among them, I r (x), I g (x) respectively represent the red and green channels of the image, Resp...

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Abstract

The invention provides an underwater image enhancement method based on color correction and contrast stretching, belongs to the technical field of image processing, and aims to solve the problems of color distortion, low contrast, fuzzy details and the like of an underwater image due to absorption and scattering effects of an underwater medium. The method comprises the following steps: firstly, performing color compensation on an original underwater image to solve an image color cast problem; then performing color correction to solve the problem of color distortion, in order to highlight imagedetail information, performing R, G and B three-channel detail feature map reconstruction by using a Gaussian difference pyramid, and finally, in order to enhance the contrast and brightness of the image, performing stretching operation on the image by using a CLAHE algorithm to obtain a final clear underwater enhanced image. The method has the advantages that the global contrast of the image isimproved, the visibility is good, a good enhancement effect is achieved, the global contrast is improved, and detail enhancement and color fidelity are achieved.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an underwater image enhancement method based on color correction and contrast stretching. Background technique [0002] In recent years, the sharpening technology based on underwater image restoration and enhancement has been well developed. The underwater image restoration method is based on a physical model of underwater optical imaging. This type of method analyzes the degradation mechanism of underwater images, estimates the parameters of the imaging model and inverts the degradation process to obtain a clear and natural underwater image. The underwater image enhancement method does not consider the underwater imaging mechanism. This type of method is based on the existing image enhancement technology, which improves the contrast and color by adjusting the pixel value of the degraded image, and then obtains the underwater image with rich information and bette...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G06T7/90G06T5/00G06T5/40
CPCG06T7/90G06T5/40G06T2207/20016G06T5/00
Inventor董丽丽张卫东邹沛煜赵恩重冯森许文海
OwnerDALIAN MARITIME UNIVERSITY