Defogging restoration method based on image decomposition

An image and scene image technology, applied in the field of defogging and restoration based on image decomposition, can solve the problems of inaccurate transmittance estimation and poor self-adaptation, and achieve good processing effect and strong self-adaptive ability

Active Publication Date: 2021-08-24
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to solve the problems of inaccurate estimation of transmittance and poor self-adaptation when prior information fails

Method used

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  • Defogging restoration method based on image decomposition
  • Defogging restoration method based on image decomposition
  • Defogging restoration method based on image decomposition

Examples

Experimental program
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Example Embodiment

[0025] Combine Figure 1 with figure 2 In the present embodiment, the specific implementation process of the method is: Figure 1 Indicated. The decay reflected light causes the light incident to the image forming system to weaken, drowning the details information and color information of the image, and the imaging contrast is lowered. The atmospheric light participating in the imaging enters the imaging field of view, causing the high frequency component of the image to be suppressed, the low frequency component is protruding, and the image detail is lost, contrast, and sharpness degradation.

[0026] In the present embodiment, the atmospheric scattering imaging model is shown in the following formula:

[0027]

[0028] Where i (x) is a fog scene image, j (x) is a non-fog scene image, and A is global atmospheric light, T (X) is atmospheric transmittance, J (X) T (X) attenuation model, A (1-t (x)) atmospheric light model. The minimum channel will be obtained (1).

[0029]

[003...

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Abstract

The invention discloses a defogging restoration method based on image decomposition, relates to the technical field of digital image processing, and solves the problems of inaccurate transmittance estimation and poor self-adaption when prior information fails in an existing defogging restoration method. The defogging restoration method is according to an atmospheric scattering model. According to the algorithm, a minimum channel image of a foggy image is decomposed into a sparse attenuation part and a low-rank atmospheric light part, a transmittance image with rich details is obtained through accurate estimation of the sparse atmospheric light part, smooth filtering processing is carried out on the transmittance image through guided filtering, and accurate transmittance estimation can be achieved. The algorithm processing effect is good, and the adaptive capacity is high.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method for defogging and restoring based on image decomposition. Background technique [0002] Outdoor visible light optical imaging system The optical imaging system is often affected by natural weather conditions such as fog and haze. Due to the scattering, absorption and reflection effects of suspended particles in the atmosphere, the imaging sensor cannot collect clear high-quality images or image sequences. It seriously affects the subsequent work of target recognition, tracking, registration, segmentation, etc., and limits the effectiveness of outdoor imaging equipment to a large extent. [0003] In recent years, major traffic accidents, road traffic interruptions, and flight delays or cancellations have occurred frequently due to reduced visibility and reduced visual quality caused by severe weather such as smog. As a normalized weather, smog has attrac...

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T5/005G06T5/003G06T5/002
Inventor 毕国玲司国良何斌石俊霞赵莹
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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