Integrated Processing Method for Dehazing Imaging, Visibility Extraction and Depth Estimation

A processing method and visibility technology, applied in the field of image processing, can solve the problems of consuming UAV load and reducing the flight efficiency of UAV, and achieve the effect of improving the effect of aerial photography

Active Publication Date: 2022-02-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

Equipped with a visibility detection device will inevitably consume the limited load of the UAV and reduce the efficiency of UAV flight

Method used

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  • Integrated Processing Method for Dehazing Imaging, Visibility Extraction and Depth Estimation
  • Integrated Processing Method for Dehazing Imaging, Visibility Extraction and Depth Estimation
  • Integrated Processing Method for Dehazing Imaging, Visibility Extraction and Depth Estimation

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Embodiment 1

[0053] Such as figure 1 As shown, this embodiment provides an integrated processing method for defogging imaging, visibility extraction and depth of field estimation, which includes:

[0054] In computer vision, select the classic fogging model:

[0055] I(x)=t(x)·D(x)+(1-t(x)).A (1)

[0056] Where x is the pixel coordinates, I(x) is the observed foggy image, D(x) is the natural color of the scene without attenuation, A is the atmospheric light background light, t(x) is the transmittance, where t( x) have:

[0057] t(x)=e -βd(x) , t(x)∈(0,1)(2)

[0058] β is the atmospheric extinction coefficient, d(x) is the distance of light transmission;

[0059] It can be seen from formula (1) that the color I(x) of the scene after atmospheric transmission attenuation is the linear superposition of the natural color D(x) of the scene and the atmospheric background light A about t(x).

[0060] Use the image matching algorithm to find the common scene in the two frames of changing imag...

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Abstract

The present invention relates to the technical field of image processing, in particular to an integrated processing method for defogging imaging, visibility extraction and depth of field estimation, which includes the following steps: 1. Selecting a classic fogging model; 2. Obtaining atmospheric background light 3. Obtain the estimated value of the transmittance according to the dark channel prior; 4. Complete the restoration of the fog-free image; 5. Express the fogging model in the color space in vector form, and construct the auxiliary line to solve the same scene in two frames The ratio of transmittance in the image can further solve the true color of the scene and the corresponding transmittance; 6. Combining the change value of the distance between the scene and the drone can solve the atmospheric extinction coefficient, and use the empirical formula of extinction coefficient and visibility to calculate Out of visibility; seven, seek the depth of the scene. The invention helps to improve the aerial photographing effect under the weather such as fog and haze, and can also be used for traffic, environmental protection visibility detection and survey distance measurement.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an integrated processing method for defogging imaging, visibility extraction and field depth estimation. Background technique [0002] With the development of unmanned aerial technology, UAVs are increasingly replacing traditional manned spacecraft with their advantages in safety and mobility, and are used in various scenarios such as patrols, reconnaissance and rescue, and surveys. The image quality of UAV aerial photography is easily affected by fog and haze, which leads to the degradation of aerial image quality. This not only affects the task effect of UAV aerial photography, but also limits the working scene and time of UAV. Therefore, there is an important practical demand for the research of image defogging algorithm. Subsequent scholars have successively proposed methods such as image contrast enhancement, mean value defogging, and median value defogging. These ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00G06T7/90
CPCG06T5/003G06T5/007G06T7/90G06T2207/10024
Inventor 蒋大钢孔令钊张宇刘昕钟港王毅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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