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Night traffic block port image enhancement method based on dark channel prior

A dark channel prior, dark channel image technology, applied in the field of night traffic bayonet image enhancement based on dark channel prior, can solve the problems of poor universality and limited enhancement effect, and achieves improved calculation speed, improved detailed information, The effect of enhanced detail information in the window area

Inactive Publication Date: 2016-09-07
NANJING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

However, this type of method requires specific acquisition hardware and strict acquisition conditions, so the universality is poor
Currently, based on the single picture The dark channel prior algorithm such as , has become a research hotspot because of its simple idea and remarkable effect, but the dark channel prior theory on which this method relies has restrictions. picture image enhancement is limited

Method used

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  • Night traffic block port image enhancement method based on dark channel prior
  • Night traffic block port image enhancement method based on dark channel prior
  • Night traffic block port image enhancement method based on dark channel prior

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Embodiment Construction

[0020] The theoretical basis of this method is: the night traffic checkpoint picture Like the inversion obtained after inverting the R, G, and B channels picture Like, its brightness histogram picture and foggy during the day picture Image brightness histogram picture The distribution trend is similar. Based on this theory, the present invention applies the defogging algorithm based on the dark channel prior to the traffic checkpoint at night picture image enhancement, and based on night traffic picture According to the characteristics of the image, the acquisition method of the parameters in the physical model has been improved.

[0021] combine figure 1 , the present invention comprises the following steps:

[0022] Step 1, enter night bayonet picture like, will night picture Invert like dark channel to get inverted night bayonet picture picture;

[0023] Step 2, using the reverse bayonet picture like, get dark channel picture picture;

[0024] Step 3, calcu...

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Abstract

The invention relates to a night traffic block port image enhancement method based on dark channel prior, and the method comprises the following steps: a night traffic block port image is inputted, and a night image dark channel is inversed to obtain an inversed night block port image; the inversed block port image is used to acquired a dark channel image; global airglow in an atmospheric scattering model is calculated; according to the global airglow, a transmissivity image is obtained; guiding filtering makes the transmissivity image to be fine; according to the global airglow and fine transmissivity image, a inversed image of an enhanced night traffic block port image is obtained based on the atmospheric scattering model; the inversed image is inversed again, a final enhanced night traffic block port image is obtained.

Description

technical field [0001] The present invention relates to a picture Like analysis techniques, especially a nighttime traffic checkpoint based on dark channel prior picture image enhancement method. Background technique [0002] Due to the weak natural light at night, the traffic checkpoint captured by the camera picture like poor visibility, picture Like quality degradation, especially the loss of information in the window area is serious. Therefore, it is effective and convenient to enrich and highlight the night picture The detailed information of the front window of the image can meet some special needs of the intelligent transportation system. [0003] picture Image enhancement technology is aimed at a specific scene, using one or more methods, targeted enhancement picture Like a local or overall area, it makes the originally unclear target area clear and suppresses the non-target area picture image, while increasing the difference between different objects in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/30268G06T5/73
Inventor 曹国曲宝珠尚岩峰孙权森
Owner NANJING UNIV OF SCI & TECH
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