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Digital fog effect filter method based on dark primary color channel prior principle

A dark primary color, channel technology, applied in image data processing, 2D image generation, instruments, etc., to achieve the effect of reducing time and space and increasing versatility

Inactive Publication Date: 2012-09-12
DALIAN UNIV OF TECH
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Problems solved by technology

However, little attention has been paid to this aspect, and the existing methods based on dark channel priors only involve a small amount of

Method used

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  • Digital fog effect filter method based on dark primary color channel prior principle
  • Digital fog effect filter method based on dark primary color channel prior principle
  • Digital fog effect filter method based on dark primary color channel prior principle

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Embodiment Construction

[0047] 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 specific examples.

[0048] The present invention proposes a fog effect digital filter method based on the dark channel prior, and the specific implementation steps of the method are as follows:

[0049] First, load the source image 101, according to the prior principle of the dark primary color channel of the atmospheric scattering model, create a blank single-channel image, use a sliding window of 15*15 to calculate the source image 101, and take the smallest pixel RGB in the window value, and use the minimum value as the pixel value in the area of ​​the single-channel image, move the window in units of pixels and perform the same operation until the entire source image 101 is processed, and the obtained single-channel image is the dark primary color image 102 o...

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Abstract

The invention, which belongs to the computer application technology field, relates to a digital fog effect filter method based on dark primary color channel prior principle. A model in which an atmospheric scattering model is applied for defogging in haze weather and a dark primary color channel prior principle is employed to carry out operation on an image, wherein the operation including dark primary image extraction, atmospheric light estimation, transmissivity conversion, optimization compensation and fog effect simulation and the like. According to the invention, a solution scheme is proposed for limitation of an exiting model; on the basis of a perspective concept, a traditional defogging method is changed into a fog effect filter method to obtain foggy / fog-free scenes with different fog effects, so that defects existing in the prior art are overcome. According to the method, only a physical model and data calculation are needed to carry out correction operation on the physical model, thereby substantially reducing time and space and improving generality of the method.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to a fog effect digital filter method based on dark channel prior. Background technique [0002] Outdoor images tend to lose clarity and image quality due to the presence of particles in the air (fog, haze, impurities, etc.). Over the past few decades, demisting research has been devoted to improving the integrity and reliability of these systems. [0003] Using multiple images (different shooting angles or different shooting times) to deal with defogging has achieved certain results. However, the requirements of these methods for input data make it difficult for ordinary photographers to obtain suitable images. For a single image, one is based on an image enhancement method. Since the quality of the image is reduced exponentially with the distance from the scene point to the imaging sensor, this image enhancement technology that assumes the scene depth of field is not good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T11/00
Inventor 樊鑫高仁杰
Owner DALIAN UNIV OF TECH
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