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Image defogging method based on regional line prior

An area line and image technology, applied in the field of image processing, can solve the problems of unsatisfactory image defogging effect and slow processing time, and achieve the effects of reducing processing time, improving accuracy, and low time complexity

Pending Publication Date: 2022-02-18
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: In order to overcome the defects of unsatisfactory image defogging effect and slow processing time caused by ignoring the potential relationship between imaging parameters in the existing image defogging technology in the prior art, the present invention provides a method based on area line prioritization An experimental image defogging method, which has high robustness, makes the defogged image accurate and effective, and can obtain more real and effective information from it, and the method has low time complexity

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  • Image defogging method based on regional line prior
  • Image defogging method based on regional line prior
  • Image defogging method based on regional line prior

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Embodiment 1

[0102] An image defogging method based on area line prior in this embodiment, the method provides an image defogging system based on area line prior, refer to figure 1 , the system includes the following modules:

[0103] Image input module: used to read the original image I, the original image I refers to the image information obtained from the outdoor scene information collection under the haze weather or worse severe weather conditions, the original image I is not limited to fog image;

[0104] Image processing module: used to perform defogging processing on the above-mentioned original image I to obtain a defogged image I';

[0105] Image output module: for outputting the defogged image I' corresponding to the original image I;

[0106] Based on the image defogging system of the above-mentioned area line prior, the method of this embodiment includes the following steps: first, the original image I is read by the image input module; then the original image I input is sent...

Embodiment 2

[0108] An image defogging method based on region line prior in this embodiment, based on embodiment 1, performs defogging processing on the original image I through the image processing module to obtain the defogged image I', wherein the image processing module includes the region line Prior constraints module.

[0109] The above area line prior constraint module is based on dividing an image into multiple areas with the same scene depth. The average radiation intensity of each area is proportional to its scene depth. The farther the scene depth is, the higher the average brightness value of the area is.

[0110] It is known that for the original image I, the atmospheric scattering model ASM can be expressed as:

[0111] I(x,y)=A·ρ(x,y)·t(x,y)+A·(1-t(x,y)) formula (1)

[0112] In the above formula, (x, y) represents the position coordinates of the original image I, I(x, y) represents the reflectivity of the scene with the position coordinates (x, y) in the foggy scene, A repr...

Embodiment 3

[0124] An image defogging method based on region line prior in this embodiment, based on embodiment 2,

[0125] First, the above original image I is divided into n regions, assuming that the atmospheric transmittance in the same region is the same, then Represents the average atmospheric transmittance of the mth region, and the further above formula (1) can be simplified as:

[0126]

[0127] In the above formula, m ∈ (1,2,...,n), (x, y) represents the position coordinates of the original image I, A represents the atmospheric light value, ρ(x, y) represents the position coordinates in the fog-free scene ( The scene reflectance of x,y), Indicates the average atmospheric transmittance of the mth region, m∈(1,2,…,n).

[0128] Then, take the mean value operation on both sides of the formula (5), then the formula (5) is transformed into:

[0129]

[0130] In the above formula, Indicates the average scene reflectance of the mth area in a foggy scene, Indicates the ave...

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Abstract

The invention discloses an image defogging method based on regional line prior, and belongs to the technical field of image defogging processing, wherein the method comprises the following steps: firstly, reading an original image I through an image input module; performing defogging processing on the original image I through an image processing module; and finally, outputting a defogged image I' corresponding to the original image I through the image output module, wherein the image processing module comprises a priori constraint module, a joint optimization module and a scene recovery module. Defogging processing is performed on the foggy image through the modules to obtain a fogless image. The method has high robustness, the defogged image is accurate and effective, more real and effective information can be obtained from the defogged image, and the method is low in time complexity.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image defogging method based on region line prior. Background technique [0002] Haze is a common natural phenomenon in the real world. For information collection industries such as image information collection, the appearance of haze will seriously reduce the contrast between image information and real information, and change the inherent color of the image. Not only smog, but any weather that can affect the quality of captured images can reduce the contrast between image information and real information, especially when shooting outdoor scenes under worse weather conditions, and low-contrast images captured under the above conditions (A low-contrast image can be called a foggy image) Usually there is not enough information to ensure the normal operation of the visual system. Therefore, how to restore the foggy image to ensure the true effectiveness of im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06F30/20G06F111/04
CPCG06F30/20G06F2111/04G06T5/73
Inventor 鞠铭烨王时巨张登银
Owner NANJING UNIV OF POSTS & TELECOMM
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