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Image fog and haze removal method and apparatus

An image and haze technology, which is applied in the field of image processing, can solve problems such as slow computing time and inability to adapt to fast defogging, and achieve the effects of fast defogging, reduced computing complexity, and improved computing speed

Inactive Publication Date: 2017-02-22
LETV HLDG BEIJING CO LTD +1
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  • Abstract
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Problems solved by technology

[0012] Based on this, it is necessary to provide a method and device for image haze removal in view of the technical problems that the existing technology has a slow calculation time and cannot meet the needs of fast dehazing.

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  • Image fog and haze removal method and apparatus
  • Image fog and haze removal method and apparatus
  • Image fog and haze removal method and apparatus

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0041] like figure 1 Shown is a work flow chart of a method for removing image haze provided by an embodiment of the present invention, including:

[0042] Step S101, calculating the dark channel of each pixel in the foggy image to obtain a dark channel vector, and calculating the atmospheric light component value and the first transmittance vector according to the dark channel vector;

[0043] Step S102, using a matting algorithm to refine the first transmittance vector through iterative operations to obtain a second transmittance vector, and decomposing the value of each element of the intermediate result vector of each step of iterative operation into corresponding values ​​in the foggy image At least one linear combination of the RGB values ​​of the pixels is obtained by calculating the coefficients of each linear combination usi...

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Abstract

Embodiments of the invention disclose an image fog and haze removal method and system. The method comprises the steps of calculating dark primary color channels of pixel points of a foggy image, obtaining dark primary color channel vectors, and calculating an atmospheric optical component value and a first transmissivity vector according to the dark primary color channel vectors; refining the first transmissivity vector through iterative operation by adopting an image matting algorithm to obtain a second transmissivity vector, decomposing values of elements of intermediate result vectors of iterative operations into at least one linear combination of RGB values of the corresponding pixel points in the foggy image, and calculating coefficients of the linear combinations by adopting an integral image algorithm; and recovering the foggy image to a fog-free image according to an atmospheric scattering model according to the second transmissivity vector and the atmospheric optical component value. According to the method and the system provided by the embodiments of the invention, the operation complexity of the intermediate result vectors is greatly lowered, the operation speed is increased, and fog is quickly removed.

Description

technical field [0001] The present invention relates to the technical field related to image processing, in particular to a method and device for removing image haze. Background technique [0002] In recent years, environmental pollution has become more and more serious, and the number of cities with smog is also increasing. The presence of smog greatly reduces visibility. In the case of foggy weather, there are a large number of granular media in the atmosphere, such as water droplets, dust particles, etc. When the reflected light of the target object passes through the atmosphere, it will be scattered and absorbed by these media, and the light intensity will be attenuated, resulting in a decrease in the contrast of the image, details and features will be covered, and the color will be seriously distorted. The lack of image information will bring certain difficulties to target determination, especially in dense fog weather, the visibility is extremely reduced and the imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T5/73
Inventor 郭剑
Owner LETV HLDG BEIJING CO LTD
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