Image defogging method and device

An image and sub-image technology, which is applied in the field of image defogging methods and devices, can solve problems such as difficult to achieve real-time defogging processing of foggy images, complex calculations of soft matting methods, and long processing time, etc., to achieve defogging processing Time shortening, real-time defogging processing, and simple calculation effects

Inactive Publication Date: 2015-09-09
BEIJING QIYI CENTURY SCI & TECH CO LTD
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Problems solved by technology

This method mainly selects a scale parameter to calculate the minimum value of each component of the pixel in the corresponding scale window in the color image, and uses this value as the dark channel prior information, and then estimates the depth information of the scene through the dark channel prior information, and the depth information Combine the atmospheric scattering model to estim

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  • Image defogging method and device
  • Image defogging method and device
  • Image defogging method and device

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[0052] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0053] An image defogging method based on atmospheric scattering models, such as figure 1 As shown, the method can include:

[0054] S101: Determine the atmospheric light value A of the target image according to a preset algorithm;

[0055] The determination of the atmospheric light value A of the target image can be achieved by using existing technical solutions in the prior art, and the present invention is not specifically limited herein...

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Abstract

The embodiment of the invention discloses an image defogging method and device. Based on a atmospheric scattering model, the method comprises the steps of determining a rough dark channel image formed by a minimum gray level channel value of each pixel point in an target image; image processing the obtained rough dark channel image by adopting a gaussian pyramid and a median filter in sequence, so as to obtain an image; removing smooth local standard deviation Idetail(x), corresponding to the image, from the image, so as to obtain an image Is(x) subjected to detail removal; determining a target dark channel image Id(x); according to the determined target dark channel image Id(x) and a preset second regulation parameter omega (omega is greater than 0 and less than 1), determining a transmission function t(x); according to the atmospheric scattering model, defogging the target image by using a determined atmospheric light value A and the transmission function t(x). Compared with a soft matting method, a calculation method adopted by the steps is simple in operation, so image defogging time is greatly shortened by a contrast experiment, and realtime defogging on an image in a foggy day can be performed.

Description

technical field [0001] The invention relates to the field of image processing, in particular to an image defogging method and device. Background technique [0002] Under the influence of foggy weather, the images (pictures, videos) acquired by the image acquisition equipment often have degradation phenomena such as blurring and weakening contrast. If they are directly applied to the computer vision system, it will inevitably affect the robustness and accuracy of the system. Negative Effects. Therefore, it is necessary to use the image defogging algorithm to dehaze and enhance the foggy image. [0003] In the prior art, the atmospheric scattering model is usually used to dehaze the image according to the prior information rules of the foggy image. A typical method is the He method based on dark channel prior information. This method mainly selects a scale parameter to calculate the minimum value of each component of the pixel in the corresponding scale window in the color ...

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Application Information

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IPC IPC(8): G06T5/00
Inventor 朱柏涛
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD
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