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Image defogging method facing to atmospheric scattering proximity effect

A proximity effect and atmospheric scattering technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of insufficient image details, lack of consideration, unsatisfactory image contrast and clarity, etc.

Inactive Publication Date: 2012-05-02
ZHEJIANG UNIV
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Problems solved by technology

However, this method does not consider the convolution degradation of the image caused by the proximity effect caused by the atmospheric scattering of atmospheric particles, aerosols, and air turbulence during the long-distance transmission process before the scene target reaches the imaging camera, which leads to the final image The contrast and sharpness are still not ideal, and the image details are still not rich enough

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  • Image defogging method facing to atmospheric scattering proximity effect
  • Image defogging method facing to atmospheric scattering proximity effect
  • Image defogging method facing to atmospheric scattering proximity effect

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Embodiment Construction

[0032] like figure 1 As shown, the implementation steps of the image dehazing method for the proximity effect of atmospheric scattering in this embodiment are as follows:

[0033] 1) Obtain the image transmittance of the original image and obtain a preliminary dehazing image of the original image through an image dehazing algorithm;

[0034] 2) Establish the radiation transfer equation of the image according to the image transmittance of the original image;

[0035] 3) Solve the radiative transfer equation to obtain the atmospheric point spread function of the image;

[0036] 4) Perform deconvolution processing on the preliminary dehazed image according to the atmospheric point spread function to obtain the final dehazed image.

[0037] In step 1) of the present invention, any image dehazing algorithm can be used to obtain a preliminary dehazing image of the original image. The prior image dehazing method can better realize the image dehazing, and can improve the image deha...

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Abstract

The invention discloses an image defogging method facing to an atmospheric scattering proximity effect. The method comprises the following steps: 1) obtaining the image transmittivity of a primary image and obtaining an initial defogging image of the primary image through an image defogging algorithm; 2) establishing a radiation transmission equation of the image according to the image transmittivity of the primary image; 3) solving the radiation transmission equation to obtain an atmospheric point diffusion function; 4) performing the deconvolution processing on the initial defogging image according to the atmospheric point diffusion function to obtain a final defogging image. The method provided by the invention can be used for reducing the influence of the atmospheric scattering proximity effect on the imaging image, improving the contrast and definition of the image, increasing the image detail and achieving a good image defogging effect.

Description

technical field [0001] The invention relates to a computer image processing technology, in particular to a computer image processing method for image dehazing oriented to the proximity effect of atmospheric scattering. Background technique [0002] General satellite remote sensing imaging is for long-distance imaging. Atmospheric clouds and fog make solar radiation and sky light directly reach the camera image surface due to the scattering effect, becoming image background noise. The scattering, irregular refraction, absorption and other effects of atmospheric particles, aerosols, air turbulence, etc. on light cause fluctuations in the light intensity on the receiving detector surface, reducing the image contrast and spatial resolution, resulting in the photoelectric system in the actual atmospheric environment. The use performance is degraded, and the above two situations are collectively referred to as atmospheric cloud and fog degradation. One of the main characteristics...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
Inventor 陶叔银冯华君徐之海李奇
Owner ZHEJIANG UNIV
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