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Road weather detection method based on video

A detection method and road technology, applied in the field of video-based road weather detection, can solve problems such as accurate and timely prediction, inability to directly provide air fog and haze content, and inability to provide expressway weather changes.

Inactive Publication Date: 2016-06-01
ANHUI WANTONG TECH
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Problems solved by technology

[0009] The present invention designs a video-based road weather detection method, and the technical problems it solves are (1) the existing video-based road weather detection method cannot directly provide the content of fog and haze in the air, nor can it provide the Accurate and timely forecast of future weather changes

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Embodiment Construction

[0029] Combine below figure 1 and figure 2 , the present invention is further described:

[0030] Since the human eye is more sensitive to brightness information than color information, currently only the brightness information of the image is analyzed and processed, and the color information is temporarily ignored. In 1924, Koschmieder proposed: with the sky as the background, the relationship between the observed brightness and distance of the observed luminous object is shown in the formula (1), and L is the observed brightness of the object. L 0 for its own brightness.

[0031] Formula 1)

[0032] In the formula: L f is the brightness of the sky, and k is the extinction coefficient of the atmosphere.

[0033] Based on the existing video visibility research, the present invention takes into account the detection algorithm and its system availability and stability, adopts the camera self-calibration technology to restore the distance information in the image, and ...

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Abstract

The present invention relates to a road weather detection method based on a video. The method comprises the following steps that: the computer calibration technology is used to restore the distance information in an image; a virtual target object with a road as a background is established and the ejection of a target body with distance information at two sides of the road is avoided; a camera starts to jump a preset location; a target image block is matched; the camera reaches a preset location; a wavelet transform technique is used to remove the influence of noise on the edge of target object, and the pixels beloning to the edge are extracted; a contrast model in accordance with human vision is used to extract a target characteristic; the eye visibility curve fitting is carried out according to the characteristic information and distance information of a target object; and finally, according to an obtained eye visibility curve, combined with the eye contrast threshold 0. 05 recommended by the authority International Commission on illumination (CIE), and the fog content and haze content in the atmosphere are determined according to the visibility of the image.

Description

technical field [0001] The invention relates to a method for detecting road weather based on video, in particular to a method for detecting fog content and haze content in road weather based on video. Background technique [0002] In recent years, the mileage of expressways in my country has been increasing, and disastrous weather such as heavy fog, heavy rain, ice and snow has become the main factor affecting traffic safety and efficiency. Due to the erratic road weather and various specific geological conditions of the expressway, it is very easy to frequently and rapidly produce special meteorological conditions such as local short-term or long-term rain, snow, and fog on the road. It is difficult to obtain it through the forecast of the meteorological department, and the driver is driving at a high speed on the expressway. Since he does not get an early warning and knows nothing about the road conditions ahead, it is impossible to take corresponding preventive measures, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/00
CPCG01W1/00
Inventor 高泉峰朱昀姜少飞周霞柯章胜李家红刘光龙韩艺
Owner ANHUI WANTONG TECH
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