Multi-scale transmission image fusion method for image pyramid model

A technology of image pyramid and fusion method, which is applied in the field of dark channel prior defogging processing algorithm, can solve problems such as residual fog and general effect, and achieve the effect of improving effectiveness

Pending Publication Date: 2018-09-18
NANJING JULI INTELLIGENT MFG TECH INST CO LTD
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Problems solved by technology

Although the guided filter has a faster processing speed, the effect is average, and there is still residual fog at the edge of the depth of field with a large gradient

Method used

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  • Multi-scale transmission image fusion method for image pyramid model
  • Multi-scale transmission image fusion method for image pyramid model
  • Multi-scale transmission image fusion method for image pyramid model

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0057] Step 1, such as figure 2 As shown in , the degradation model is obtained according to the atmospheric scattering model, the degradation model is deformed, and the minimum value operation is performed on the deformed degradation model.

[0058] First, the degradation model is obtained according to the atmospheric scattering model:

[0059] I(x)=t(x)J(x)+A(1-t(x)) (1)

[0060] Among them, I(x) represents the foggy image, J(x) represents the image after dehazi...

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Abstract

The invention discloses a multi-scale transmission image fusion method for an image pyramid model. The method is established based on the image pyramid model, the transmittance of an original image iscalculated through utilizing 15*15 and 1*1 filter templates, image processing advantages of the two types of filter templates are fully utilized to improve effectiveness of image processing, and theedge information is preserved; transmission image characteristics of the two types of different filters are taken into account, and the fusion weight of a pyramid underlying decomposition image decreases with the increase of the number of corresponding pyramid layers. The weight is exactly opposite of the trend of the pyramid, so an adaptive multi-scale transmission image fusion algorithm is utilized, that is, the fusion scale decreases as the number of corresponding image pyramid layers increases, and the advantages of the both filtering methods can be kept to the maximum degree. The method is advantaged in that the image vision effect can be effectively enhanced, and serious color distortion can be prevented on the condition that edge consistency is kept.

Description

technical field [0001] The invention relates to a dark channel prior defogging processing algorithm, which belongs to the technical field of color defogging image processing. Background technique [0002] In foggy weather conditions, during the imaging process, the reflected light received by the lens will be diffusely reflected and absorbed by a large number of solid and liquid particles in the fog, resulting in problems such as low contrast in the image, and the imaging effect is poor. At present, there are mainly two methods for image defogging, namely image enhancement and image restoration. Image enhancement is mainly to highlight some details in the image so as to improve the visual effect of the image. Image restoration is mainly based on the physical model and prior knowledge to invert the image degradation process and compensate for the distortion caused by the image degradation process. At present, image restoration is mainly divided into three categories: based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/002G06T2207/20016G06T2207/20192G06T2207/20221
Inventor 张登银薛睿赵莎莎顾振飞鲍唤唤钟铭张恩轩
Owner NANJING JULI INTELLIGENT MFG TECH INST CO LTD
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