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Single-image rapid defogging method and device and image processing system

A single image and image technology, applied in the field of computer vision, can solve the problems of excessive defogging, slow calculation speed, and calculation errors in foggy images, and achieve the effects of increased contrast and visibility, advantages in calculation speed, and a wide range of applications

Active Publication Date: 2013-11-27
BEIHANG UNIV
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Problems solved by technology

However, the optimization step of this method for the transmission rate image occupies most of the calculation time, and cannot be used for real-time defogging of large-scale images.
[0004] Of course, other image defogging methods have been proposed in the prior art, but these methods still have certain calculation errors. Problems with excessive or incomplete defogging
In addition, the calculation speed of the above-mentioned dehazing method is relatively slow, which cannot meet the application requirements of real-time dehazing with a large amount of data

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Embodiment Construction

[0046]The basic idea of ​​the present invention is: perform denoising processing on the fog image to obtain the denoised fog image; calculate the atmospheric light source according to the fog image, and calculate the estimated transmission rate according to the denoised fog image; According to the foggy imaging model, calculation is performed from the denoised foggy image, atmospheric light source and estimated transmission rate to obtain a restored image, and the brightness of the restored image is adjusted.

[0047] It should be noted that the following embodiments of the present invention perform calculations based on color images, but grayscale images are schematically substituted for color images in the description of the drawings. In fact, the method of the present invention can also be used for the defogging of grayscale images, but the specific algorithm needs to be simplified. In order to better reflect the effect of image defogging, the general image defogging method...

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Abstract

The invention discloses a single-image rapid defogging method. The single-image rapid defogging method comprises the following steps that de-noising processing is conducted on a foggy day image, so that a foggy day image generated after de-noising processing is obtained; an atmosphere light source is worked out according to the foggy day image, and the estimated transmission rate is calculated according to the foggy day image generated after de-noising processing; based on a foggy day imaging model, calculation is conducted according to the foggy day image generated after de-noising processing, the atmosphere light source and the estimated transmission rate, a restored image is obtained, and brightness adjustment is conducted on the restored image. The invention further discloses a device corresponding to the single-image rapid defogging method and an image processing system. By the adoption of single-image rapid defogging method and device, calculation errors generated in the existing image defogging process can be effectively reduced, the defogging effect is better, the image defogging time can be shortened, and the application range is wider.

Description

technical field [0001] The present invention relates to the technical field of computer vision, in particular to a single image fast defogging method, device and image processing system. Background technique [0002] The scattering effect of tiny particles in the atmosphere, such as fog and haze, will degrade the images taken in outdoor scenes, resulting in a decrease in image quality and affecting visual effects. In foggy weather, the viewing distance is short and the visibility of the scene is low. In images taken in foggy weather, the real information of areas with a long depth of field will be seriously lost. Compared with the fog-free image, the contrast of the foggy image decreases, and the overall color information is not rich enough. By defogging foggy images, image contrast can be improved, color distortion can be corrected, scene visibility can be increased, and visual effects can be improved. Image defogging methods have great demand in various application fiel...

Claims

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Application Information

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IPC IPC(8): G06T7/00
Inventor 魏振忠葛广一曹志鹏
Owner BEIHANG UNIV
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