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Scroll-oriented image dehazing method

An image and color image technology, applied in the field of image dehazing, can solve problems such as the halo effect in the edge area, and achieve the effect of saving computing time, natural visual effect, and improving overall brightness

Active Publication Date: 2018-11-16
XIDIAN UNIV
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Problems solved by technology

This method has a relatively high defogging efficiency, but due to the use of a median filter algorithm that does not have good edge retention, there is a serious halo effect in the edge area of ​​​​the defogged result.

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings.

[0034] Refer to attached figure 1 , the concrete steps of the present invention are as follows:

[0035] Step 1: Input an optional foggy color image H, and sequentially calculate the minimum image M and dark channel image D of the foggy color image H.

[0036] The foggy color image used in this embodiment is as attached figure 2 And attached image 3 shown. Among them, attached figure 2 It is a road traffic fog image, the size is 600×400, attached image 3 It is a foggy image of a house, the size is 441×450.

[0037] (1a) from attached figure 2 And attached image 3 Choose a foggy color image as an input foggy color image H;

[0038] (1b) Take the minimum gray value of each pixel in the foggy color image H on the three color channels of R, G, B, namely red, green and blue, and obtain the minimum value image M of the foggy color image H;

[0039] (1c) Perfo...

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Abstract

The invention discloses an image defogging method based on rolling guidance, and mainly solves the problem that the defogging result obtained by using the present defogging method is dark as a whole and accompanied with a vignetting effect. The method is implemented through the following steps of: (1) inputting a foggy color image, and calculating a minimum value image and a dark channel image of the foggy color image in turn; (2) calculating an atmosphere light value of the foggy color image; (3) calculating an initial rough transmission image of the foggy color image; (4) optimizing the initial rough transmission image; (5) calculating an initial defogging result according to an atmospheric scattering physical model; and (6) performing detail enhancement treatment based on layers on the initial defogging result and obtaining a final defogging result. The image defogging method based on rolling guidance avoids the generation of the vignetting effect, improves the whole brightness of the defogging result, makes the defogging result more natural, and can be used in the fields of traffic monitor, automatic drive, space remote sensing and security and protection monitor.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to an image defogging method, which can be used in the fields of traffic monitoring, automatic driving, aerospace remote sensing and security monitoring. Background technique [0002] In recent years, large-scale and persistent smog pollution incidents have occurred frequently, which not only affects everyone's health and daily life, but also seriously degrades the quality of images captured by outdoor monitoring equipment, which brings great harm to outdoor monitoring, monitoring, and intelligent identification and tracking systems. For example, under the influence of smog weather, the license plate and other information of illegal vehicles on traffic arteries may not be accurately recognized, and the outdoor monitoring equipment of banks and other institutions may cause security problems due to the inability to capture clear human body feature information. If ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/003G06T2207/10016G06T2207/10024G06T2207/20028G06T2207/30236
Inventor 白静张钊公文静焦李成王爽马晶晶马文萍杨淑媛
Owner XIDIAN UNIV
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