Polarized image defogging method for obtaining transmissivity based on differential polarization
A polarization image and transmittance technology, which is used in image enhancement, image analysis, image data processing, etc., can solve the problems of color distortion and excessive atmospheric light estimated value, so as to improve the clarity, restore the image quality, and restore the image. Quality visible effect
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[0043] A polarization image defogging method based on differential polarization combined with prior acquisition of bright and dark channels to obtain transmittance, specifically comprising the following steps:
[0044] (1) Use the method and equipment of polarized imaging to image the target scene, rotate the polarizer, and obtain two orthogonally polarized images of the same scene; respectively, the light intensity map (denoted as I) that fog has the least influence on the image / / ) and the light intensity map that has the greatest influence on the image (denoted as I ⊥ ); read two orthogonal images in MATLAB (the following steps are all implemented on the MATLAB platform).
[0045] According to the imaging characteristics of the scattering environment, the atmospheric scattering model includes two parts:
[0046] Scene target direct light transmission: D(x, y) = L(x, y)t(x, y)
[0047] Atmospheric light: B(x,y)=A ∞ [1-t(x,y)]
[0048] Where (x, y) represents the coordin...
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