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A Dehazing Method of Image

An image and image block technology, applied in the field of image processing to achieve the effect of eliminating blocky effects

Active Publication Date: 2017-10-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention expects to provide an image defogging method, which can at least solve technical problems such as block effect existing in existing defogging methods

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0049] In order to solve the technical problems such as the block effect existing in the existing defogging methods, an embodiment of the present invention provides an image defogging method, which is applied to images containing fog, such as figure 2 As shown, the method includes the following steps:

[0050] Step S101: Obtain the dark channel of the image through the color channel of the image;

[0051] The image described in this embodiment refers to an image containing fog obtained by a digital imaging device (such as a mobile phone, a video camera, a digital camera, etc.), and the image is also called a color cast image. The color cast image has low contrast, serious loss of details, and fogging, which brings great difficulties to subsequent image processing and analysis.

[0052] In this embodiment, the image is decomposed by the channel method, and the pixel value of each pixel point of the image on the RGB (Red-red, Green-green, Blue-blue) channel is obtained, and ex...

Embodiment 2

[0093] This embodiment describes the present invention in detail based on an actual scene.

[0094] The present embodiment method comprises the following steps:

[0095] (1) Get the color channel of the image

[0096] Input the foggy images obtained by digital imaging devices such as digital cameras and mobile phone cameras into the computer, and represent the images in the RGB color space;

[0097] The color shift image is obtained by digital imaging equipment (such as digital camera, mobile phone camera, etc.). Under fog and haze conditions, the image quality captured by the optical sensor of digital imaging equipment is seriously degraded, the image contrast is low, the details are seriously lost, and foggy images are generated, which brings great difficulties to subsequent image processing and analysis. Read the fogged image into the computer, and obtain the pixel value of each pixel of the image in the three channels of R, G, and B through channel decomposition, so as t...

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Abstract

The invention discloses an image defogging method, which is applied to an image containing fog. The method includes: obtaining the dark channel of the image through the color channel of the image; obtaining the atmospheric light intensity and the dark channel through the dark channel. The transmittance of the image; modify the color channel according to the transmittance to obtain a corrected color channel; obtain the corrected atmospheric light intensity and corrected transmittance through the corrected color channel; according to the corrected color channel, correct the atmospheric light intensity And modify the transmittance to get the defogged image. The invention corrects the color channel, atmospheric light intensity and transmittance of the image, can remove the fog of the image to the greatest extent according to the characteristics of the image itself, and eliminates problems such as block effect and the like.

Description

technical field [0001] The invention belongs to the technical field of image processing, in particular to an image defogging method. Background technique [0002] As an important means of security protection, video surveillance plays an extremely important role. However, the video surveillance system is greatly affected by environmental factors when acquiring images. For example, under fog and haze conditions, the quality of the image captured by the optical sensor is severely degraded, the image contrast is low, and the details are seriously lost, which brings great difficulties to the subsequent image processing and analysis. Therefore, efficient and feasible dehazing algorithms are studied. It has very important theoretical and research value. [0003] Domestic and foreign scholars' research on dehazing methods is mainly divided into two categories: the dehazing algorithm based on the atmospheric light scattering model and the dehazing algorithm based on image enhanceme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
Inventor 姜志国董博张浩鹏蔡博文
Owner BEIHANG UNIV
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