A three-primary color combined pre-equalization and deblurring underwater image enhancement method

An underwater image and three-primary color technology, applied in the field of image processing, can solve problems such as difficult to remove the influence of noise, artificial noise, insufficient, etc., to achieve the effect of enhancing contrast and visibility, enhancing objective quality, and improving visual quality

Active Publication Date: 2021-05-25
DONGHUA UNIV
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Problems solved by technology

[0004] Among the existing representative underwater image enhancement techniques, the HistEqu and CLAHE methods introduce more artificial noise due to ignoring the correlation of image space changes; although the DCP and PB methods increase contrast and details, they attenuate Energy is not compensated for different wavelengths, color and visibility restoration is not ideal
In general, existing underwater image enhancement methods can only reveal limited details and colors of underwater images, and it is difficult to remove the influence of noise
For underwater image enhancement, the existing methods focus on a certain aspect of qualitative indicators or quantitative indicators, there are problems such as excessive enhancement or insufficient enhancement, and the comprehensive evaluation of restoration performance is ignored.

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  • A three-primary color combined pre-equalization and deblurring underwater image enhancement method
  • A three-primary color combined pre-equalization and deblurring underwater image enhancement method
  • A three-primary color combined pre-equalization and deblurring underwater image enhancement method

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[0027] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0028] With the exploration of ocean, lake, and river resources, underwater images have become an important research field. When light propagates in water, there are scattering and absorption, and underwater images often have problems such as color distortion and low contrast. Underwater imaging can be represented as a linear superposition of forward scatter components and backscatter components, with forward scatter causing b...

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Abstract

The invention relates to an underwater image enhancement method combining pre-equalization and deblurring of three primary colors, which specifically includes: processing the image using a color-corrected histogram equalization method; reprocessing the corrected image by using a dark channel model; improving the image Estimation of background light; optimization of transmission map estimation; restoration of image scenes. The invention can obtain good visual effect and objective quality, and has the advantages of simple calculation, good restoration quality and the like.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an underwater image enhancement method with combined pre-equalization and deblurring of three primary colors. Background technique [0002] At present, the enhancement methods of underwater images are mainly divided into: (a) image defogging, (b) compensation for non-uniform illumination, and (c) increasing image contrast. Fattal et al. proposed a single image dehazing (SID) method, which first estimated the light transfer function in the blurry scene, and then eliminated scattered light based on this estimated value to increase the visibility and contrast of the image. The SID method exploits the local statistical uncorrelation of surface shading and transfer function maps. Bianco et al. proposed a simple underwater image enhancement method, which uses the great difference in the attenuation speed of the three color channels in water to estimate the depth of the underw...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/90
CPCG06T5/003G06T2207/10024G06T7/90
Inventor 孙晓帆刘浩张鑫生邓开连孙嘉曈
Owner DONGHUA UNIV
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