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Defogging method based on shape variable morphological reconstruction

A technology of morphology and deformation structure, applied in image data processing, instrumentation, calculation, etc., to achieve the effect of clear texture details, smooth transmittance, and suppress halo phenomenon

Active Publication Date: 2016-08-31
XI AN JIAOTONG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a defogging method based on shape-variable morphological reconstruction to solve the problems existing in existing defogging algorithms

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  • Defogging method based on shape variable morphological reconstruction
  • Defogging method based on shape variable morphological reconstruction

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] According to the atmospheric scattering model proposed by McCartney, the degradation process of the image in foggy days is inverted to obtain the scene image According to the image J, each channel satisfies the [0,255] pixel boundary limit, and the transmittance inequality is obtained as follows:

[0039] m i n c ∈ { r , g , b } m i n p ∈ B ( J c ( p ) ) ≥ 0 ...

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Abstract

The invention discloses a defogging method based on shape variable morphological reconstruction, comprising steps of using an image smallest color channel and a biggest color channel while synchronously performing parallel calculation on corresponding medium transmissivity, optimizing transmissivity of the smallest color channel through morphological expansion reconstruction, performing fusion on two transmissivity distribution graphs, and obtaining an optimal transmissivity which is immune to sky. Compared with the current medium transmissivity refinement method in a defogging algorithm, the defogging method of the invention can fundamentally inhibit a halo phenomenon, does not need to detect in advance, adaptively compensates the transmissivity of sky area low estimation and avoids distortion of the sky area in the defogging result.

Description

technical field [0001] The invention relates to the technical field of image restoration, and specifically discloses a defogging method. Background technique [0002] In recent years, the air quality has deteriorated seriously, and severe weather such as fog and haze frequently occurs. Affected by fog and haze, the image presents the characteristics of low contrast and low definition, the detail information in the near view is seriously lost, and the features in the distant view are completely covered or blurred, and the identifiability of information is greatly reduced. At the same time, the color fidelity decreases, and serious color shift occurs. [0003] Image defogging is to remove the fog interference in the image through certain technical means, so as to obtain satisfactory visual effects and obtain more effective information. He et al. proposed the dark channel prior statistical law, and on this basis, proposed the "dark channel prior + guided filtering" algorithm,...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/10024G06T2207/20032G06T2207/20008G06T5/00
Inventor 张斌杨宏伟饶磊李艳婷
Owner XI AN JIAOTONG UNIV
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