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Image defogging method and device

An image and algorithm technology, applied in the field of computer image processing, can solve the problems of image redness, blurring, color image color shift and distortion, etc., and achieve high quality, strong pertinence, and good defogging effect

Inactive Publication Date: 2014-04-02
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Due to the above reasons, the images obtained in foggy days are seriously degraded, not only blurred and the contrast is reduced, but also the color images will have serious color shift and distortion. For example, the images obtained in sandstorm weather often have serious redness.
This greatly reduces the application value of the image, and will bring great difficulties to the outdoor image acquisition and processing system, or even fail to work normally, and have a great impact on production and life. Therefore, this natural phenomenon It is of universal practical significance to carry out research on image signal processing due to the degradation of image quality caused by

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

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Embodiment Construction

[0017] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] see figure 1 As shown, an image defogging method includes the following steps:

[0019] Step 101, acquire a foggy image, and calculate an intensity histogram of the foggy image.

[0020] For a grayscale image, the grayscale value of each point in the image can be directly counted to form an intensity histogram, but the present invention now deals with a color image. For RGB images, since the brightness of the three color channels of each pixel is not consistent, the idea of ​​processing the intensity histograms of the RGB three-color channels separately and then merging them is wrong. For...

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Abstract

The invention provides an image defogging method and device. The method comprises the following steps: acquiring a fog-containing image, and calculating an intensity histogram of the fog-containing image; judging the type of the fog-containing image according to the intensity histogram of the fog-containing image; defogging different types of fog-containing images by adopting corresponding defogging algorithms respectively. According to the image defogging method and device provided by the invention, different defogging algorithms are adopted specific to different fog-containing images in a highly-specific way, so that a better defogging effect is achieved, the quality of an obtained defogged image is high, and the defogged image is closer to a real fog-free image.

Description

technical field [0001] The invention relates to the technical field of computer image processing, in particular to an image defogging method and an image defogging device. Background technique [0002] Under the influence of severe weather such as fog, haze, rain, snow, etc., outdoor vision systems usually suffer from image quality degradation due to the impact of water droplets in the atmosphere. As a light source, the target object acts as a light source, and the light emitted by it and other surrounding objects are blocked by particles such as water droplets in the atmosphere, interacting with them, and optical phenomena such as refraction, scattering, absorption and fusion occur, resulting in being The light intensity received by the photosensitive device (camera, etc.) changes unevenly, resulting in changes in the gray value of the image, mainly manifested in the reduction of the gray dynamic range and the reduction of the contrast between pixels. Another important fea...

Claims

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Application Information

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IPC IPC(8): G06T5/40
Inventor 朱青松杨帅
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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