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A method of underwater image restoration based on color constancy and group sparsity

An underwater image, constancy technology, applied in image enhancement, image analysis, image data processing, etc., can solve the problem that the deblurring effect is not very ideal, does not take into account the uneven distribution of suspended particles and solutes in the water body, and does not provide solutions. means, etc.

Active Publication Date: 2021-01-05
HOHAI UNIV
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Problems solved by technology

[0007] (1) In terms of underwater color correction, the characteristics of underwater images are not fully considered, and satisfactory results cannot be obtained only by using traditional image color distortion correction strategies
[0008] (2) In the process of image deblurring, the problem of uneven distribution of suspended particles and solutes in the water body itself is not considered, so no corresponding solution is given, and the deblurring effect is not very ideal

Method used

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  • A method of underwater image restoration based on color constancy and group sparsity
  • A method of underwater image restoration based on color constancy and group sparsity
  • A method of underwater image restoration based on color constancy and group sparsity

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Embodiment Construction

[0077] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0078] Such as figure 1 As shown, the underwater image restoration method based on color constancy and group sparsity includes the following steps:

[0079] First, understand the classic methods of color correction for underwater images.

[0080] The existing classic color constancy algorithms are all proposed based on the gray world hypothesis, that is, for a rich color image, the mean values ​​of the three channels of R, G, and B tend to the same gray value That is to say, the light reflecta...

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Abstract

The invention discloses an underwater image restoration method based on color constancy and group sparseness. The method first designs an improved underwater image color distortion correction algorithm based on color constancy. Based on the Shades Of Gray algorithm, In view of the color distortion characteristics of underwater images, the concept of color compensation is added to perform color correction on underwater images; then, an improved underwater image deblurring algorithm based on degradation model and group sparseness is proposed, and the designed The underwater image degradation operator and water body layering are integrated into the classic group sparse deblurring framework to restore the corrected image to further improve the clarity of the underwater image; finally, by analyzing the actual captured underwater images Experiments were conducted and the results showed that the proposed underwater image restoration method based on color constancy and group sparsity can not only perform color correction on underwater images well, but also effectively remove blur and achieve good restoration effects.

Description

technical field [0001] The invention relates to an underwater image restoration method based on color constancy and group sparseness, and belongs to the technical field of digital image processing. Background technique [0002] In recent years, underwater image processing is of great significance to researches such as water resource development and protection, marine exploration, and water pollution detection. However, in complex underwater environments, due to the absorption and scattering of light by water and some unavoidable noise that may be generated during the imaging process, the collected underwater images often have a certain degree of degradation. Specifically, on the one hand, the absorption of light by water indicates that different colors of light have different attenuation characteristics underwater, which causes color distortion in underwater images; on the other hand, the scattering of light by water and the various The noise brought by a kind of suspended ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/90
CPCG06T7/90G06T5/00G06T5/73
Inventor 王鑫戴慧凤王慧斌徐立中
Owner HOHAI UNIV
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