Underwater image enhancement method based on fish retina mechanism

An underwater image and retina technology, applied in the field of image processing, can solve the problems of difficulty, ignoring the characteristics of underwater images, not satisfying the grayscale assumption, etc.

Active Publication Date: 2017-09-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, they are mainly for land scenes, ignoring some characteristics of underwater images
Among them, the learning-based method is still difficult to apply to underwater image processing because there is currently no underwater image database with a standard light source; while the static method is mostly based on certain grayscale assumptions, but generally the red band of underwater images is obvious. We

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  • Underwater image enhancement method based on fish retina mechanism
  • Underwater image enhancement method based on fish retina mechanism
  • Underwater image enhancement method based on fish retina mechanism

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Embodiment Construction

[0058] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0059] Fish have a strong ability to adapt to color cast and blur in underwater images. Learning the image processing process of fish visual system can help solve the problems of color cast and blur in underwater images captured by cameras. Based on this, the present invention proposes an underwater image enhancement method based on the fish retina mechanism, such as figure 1 shown, including the following steps:

[0060] For an underwater image with an image size of 768*1024, which has color cast and blur problems (such as figure 2 Shown), the detailed step flow process of the present invention is as follows:

[0061] S1. Extract color components and brightness components: extract the red component I for each pixel of the underwater image R , green component I G , blue component I B , and calculate the average luminance component I.

[0062] Take...

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Abstract

The invention discloses an underwater image enhancement method based on a fish retina mechanism. According to the method, a feedback relation between fish retina horizontal cells and cone cells is simulated to remove the color cast of an underwater image, and a center-periphery antagonistic effect of fish retina bipolar cells is simulated to remove blur of the underwater image. In the whole simulation process, a structure for suppressing the bipolar cells at the fish retina horizontal cell side is simulated so as to design a dual-Gauss difference filter of a receptive field of the bipolar cells; and meanwhile, an activity of interplexiform cells for continuously releasing Dopamine in dark to regulate the horizontal cells is simulated by using a sigmoid curve, and thus the processed image is enabled to more conform to a vision mechanism of the fish; and finally nonlinear processing of amacrine cells for brightness information is simulated by adopting gamma conversion, and central input of color bipolar cells is formed.

Description

technical field [0001] The invention belongs to the technical field of image processing and relates to a color image enhancement technology, in particular to an underwater image enhancement method based on a fish retina mechanism. Background technique [0002] With the continuous enhancement of human exploration capabilities, more and more underwater images have been widely disseminated and applied. However, due to the backscattering and forward scattering of suspended particles in the water body, the image will be blurred, and the color of the underwater image will have a blue-green cast due to the different attenuation speeds of light waves of different wavelengths after the light enters the water. Image blur and color cast will make the final underwater image not clear enough. Therefore, how to remove the influence of blur and color cast and obtain underwater images with high contrast has become a more important issue. [0003] Existing image deblurring methods are main...

Claims

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Application Information

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IPC IPC(8): G06T5/00H04N9/64
CPCG06T5/001G06T5/003G06T2207/10024H04N9/646
Inventor 李永杰张明赵乾高绍兵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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