Method and device for image defogging

A technology in images and images, applied in the field of image dehazing, it can solve the problems of different dark primary color values, affecting image quality, etc., and achieve the effect of self-adaptation, best image dehazing effect, and elimination of block effect and halo phenomenon.

Active Publication Date: 2013-05-22
BEIJING JINGDONG CENTURY TRADING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the choice of scale parameters
However, after a lot of experiments, it is found that the calculated dark channel values ​​will be different if the scale parameters are different.
As an impor

Method used

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  • Method and device for image defogging
  • Method and device for image defogging
  • Method and device for image defogging

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Embodiment Construction

[0022] Exemplary embodiments of the present invention are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present invention to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0023] figure 1 is a schematic diagram of main steps of an image defogging method according to an embodiment of the present invention. Such as figure 1 As shown, the image defogging method in the embodiment of the present invention mainly includes the following steps S11 to S13.

[0024] Step S11: Perform edge detection on the fog image. The fog images here include fog...

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Abstract

The invention provides a method and a device for image defogging. The method combines a dark channel prior method and has better image defogging effects. The method includes: performing edge detection to a fogged image; blocking the fogged image to allow each image block to satisfy the condition that proportion of edge point number in the image to total pixel point number of the image block is in a preset threshold; and using the dark channel prior method to perform defogging calculation to the fogged image according to the blocks.

Description

technical field [0001] The invention relates to an image defogging method and device. Background technique [0002] The dark channel prior method is a theory summed up by He Kaiming and others by analyzing a large amount of outdoor fog-free image data, that is, in the non-sky local area of ​​most images, some pixels will always have at least one color channel with a very low value. In other words, the minimum value of the light intensity in this area is a very small number, which is the dark primary color. [0003] On the basis of statistics and analysis of a large number of outdoor images, He Kaiming and others summarized the prior knowledge of the dark channel color, and applied the prior knowledge to the process of image defogging, and achieved good results, but this method also exists insufficient. First, there are block effects and halo phenomena in this method. In the image processed by this method, a halo phenomenon will appear in areas with large color difference...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T7/00
Inventor 林祥
Owner BEIJING JINGDONG CENTURY TRADING CO LTD
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