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Foggy weather image reconstruction method based on polarization

An image reconstruction and polarization image technology, applied in the field of target detection research, can solve problems such as the estimation error of atmospheric polarization degree

Inactive Publication Date: 2016-03-30
合肥视展光电科技有限公司
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Problems solved by technology

[0005] In the prior art, although a lot of research has been done on reconstructing fog-free images from foggy images, there are still some errors in the estimation of the atmospheric light intensity value and atmospheric polarization degree at infinity

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  • Foggy weather image reconstruction method based on polarization
  • Foggy weather image reconstruction method based on polarization
  • Foggy weather image reconstruction method based on polarization

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Embodiment Construction

[0050] In this example, if figure 1 As shown, in the target detection, the polarization-based haze image reconstruction method is carried out as follows:

[0051] 1, a kind of fog image reconstruction method based on polarization, carry out as follows:

[0052] Step 1: Obtain different polarization angles θ under foggy weather conditions 1 ,θ 2 ,…,θ n Under the corresponding target polarization image I 1 ,I 2 ,...,I n ;n3;

[0053] In the present embodiment, the foggy sky polarization image is obtained by a three-channel CCD camera, and the polarization angles of the three channels are respectively 0°, 60°, and 120°. By the CCD camera, the polarization image I under three angles can be obtained simultaneously. 0 , I 60 , I 120 , figure 2 , image 3 , Figure 4 are target polarization images I with polarization angles of 0°, 60°, and 120° respectively 0 , I 60 , I 120 ;

[0054] Step 2: Use formula (1) to calculate the Stokes vector S=(I, Q, U) of the target im...

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Abstract

The invention discloses a foggy weather image reconstruction method based on polarization, comprising following steps: 1, obtaining the polarization images in different polarization angles; 2, calculating the Stokes vector value of an object image; 3, estimating the atmosphere light intensity value of the infinite distance by using light channel priori rules; 4, estimating the atmosphere light polarization degree by using a filtering method; 5, reconstructing a fogless scenery image; 6, carrying out DOP partial index enhancement to the fogless image. According to the invention, the fogless image from the foggy weather image can be reconstructed well; and the definition of the image is improved.

Description

technical field [0001] The invention is a polarization-based foggy image reconstruction method, which belongs to the field of target detection research. Background technique [0002] In a foggy environment, our road monitoring, aviation flight, terrain survey, military detection, etc. will be affected to a certain extent. This is because there are many particles in the atmosphere under foggy conditions, and these particles will transmit The light has certain effects, including scattering, reflection, absorption, etc., resulting in reduced visibility, color distortion, and blurring of the imaging of our outdoor vision system, which brings certain difficulties to the detection and identification of targets, which directly affects outdoor vision. effective functioning of the system. Therefore, reconstructing fog-free images from foggy images plays an important role in practical applications. [0003] Sunlight is a natural light source, which does not have polarization charact...

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Application Information

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IPC IPC(8): G06T5/00G06T5/10
CPCG06T5/00G06T5/10G06T2207/20032
Inventor 范之国赵录建于洋毕冉高隽
Owner 合肥视展光电科技有限公司
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