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Enhancement method of underwater color video image

A color video and image technology, applied in image enhancement, image data processing, instruments, etc., can solve problems such as loss of details, blurred color video images, etc.

Inactive Publication Date: 2012-09-12
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0003] In order to solve the above problems in the prior art, the object of the present invention is to provide a method based on the propagation characteristics of visible light in water and the composition of light on the image plane, which can effectively improve the blurring and loss of details of color video images in water areas with poor visibility. Underwater color video image enhancement method with problems such as color cast and color cast, and has good robustness

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  • Enhancement method of underwater color video image
  • Enhancement method of underwater color video image
  • Enhancement method of underwater color video image

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Embodiment Construction

[0052] An underwater color video image enhancement method. Firstly, a degradation model is constructed based on the propagation characteristics of visible light in water and the light composition on the image surface, and the image is restored by applying the dark channel prior law to remove the fuzzy noise caused by scattering. For the inhomogeneity of visible light absorption, apply the Retinex theory (Retinex is a combination of two phrases Retina of the retina and Cortex of the cerebral cortex) to enhance the image to sharpen and enrich the details, thereby improving the imaging blur of underwater color video images, Problems such as loss of detail and color cast have good robustness. The present invention will be further described in detail below in conjunction with the embodiments of the accompanying drawings:

[0053] Such as figure 1 As shown, the reflected light irradiated by the underwater lighting source 2 on the underwater object 3 is projected onto the image sens...

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Abstract

The invention discloses an enhancement method of an underwater color video image. The method comprises the following steps of: according to a propagation characteristic of visible light in water, light composition on an image surface and an expected target, establishing an underwater optical imaging model; according to a priori rule of a dark primary color, estimating an absorption function t (x, y) and a scattering parameter A of the underwater optical imaging model, and restoring the underwater color video image I into an image J; and according to an image enhancement processing method based on the Retinex theory, enhancing the image J. According to the invention, the dark primary color priori rule and the image processing method based on the Retinex theory are combined for the first time, firstly restoration processing is carried out according to the underwater optical imaging model to remove fuzzy noise caused by scattering, then enhancement processing is carried out to sharpen the details and adjust the color deviation, and compared with a previous realization method of adopting pure restoration or enhancement, the method of the invention has better robustness.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to an enhancement method of underwater color video images. Background technique [0002] Electromagnetic wave is a kind of radiation wave, which can propagate in the air and vacuum, but attenuates rapidly in the medium other than air. Sound wave is a kind of mechanical wave, which needs to be transmitted by medium. Therefore, the main carrier for detecting and transmitting information in the ocean at present is The propagation distance of sound waves in the ocean can reach tens of thousands of nautical miles, and the lower the frequency, the farther the propagation distance is; the frequency commonly used by acoustic equipment at this stage is up to the order of MHz, while the frequency range of visible light is about the order of 10,000 GHz , therefore, visible light images can show more details than sonar images. Therefore, the current communication, detection an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 艾莉莉许文海刘彦呈董丽丽
Owner DALIAN MARITIME UNIVERSITY
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