Visibility analysis method based on camera image

An analytical method and visibility technology, applied in the field of visibility, can solve the problems of time loss, hidden dangers of traffic safety, inability to meet the needs of high-density live monitoring, etc., and achieve the effect of many samples

Pending Publication Date: 2019-07-05
藏龙信息科技(苏州)有限公司
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AI Technical Summary

Problems solved by technology

In terms of meteorological risk monitoring, observation instruments are usually set up at the frequent occurrence locations of meteorological risks along the road. Density Live Monitoring Requirements
Among the various meteorological risks affecting road traffic, low visibility caused by heavy fog or cloudy fog or heavy precipitation is the most

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  • Visibility analysis method based on camera image
  • Visibility analysis method based on camera image
  • Visibility analysis method based on camera image

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[0028] The specific embodiments of the present invention will be described in further detail below.

[0029] The principle of the visibility analysis method based on the camera image of the present invention is that the visibility change affects the image; the core of the algorithm is to extract the image feature of the marker that can reflect the visibility change, thereby calculating the value of the visibility by analyzing the image feature change. Since the image contrast calculation method has basically the same calculation results and thresholds for the black target with the sky as the background and the white road markings with the black road as the background, the road marking is used as the preset standard, and the image contrast is used as the image feature Parameter, analyze the exponential distribution of image features with distance, and realize the calculation of visibility through the contrast threshold at the critical visibility distance. After presetting the obse...

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Abstract

The invention discloses a visibility analysis method based on a camera image, and belongs to the technical field of visibility. The core of the video visibility detection algorithm is to extract imagecharacteristic parameters capable of reflecting the influence of visibility change on images, so that the value of visibility is calculated by analyzing the image characteristic change. The road marking is used as a preset standard, the image contrast is used as an image characteristic parameter, the exponential distribution of the image characteristic along with the distance is analyzed, and thevisibility value is calculated through an image contrast threshold value at the critical visibility distance. According to the technical scheme provided by the embodiment of the invention, real-timeanalysis of images shot by cameras along the road is realized, quantitative measurement of visibility is completed, a reasonable judgment reference is determined, and errors which cannot be avoided byhuman eye measurement are reduced.

Description

technical field [0001] The invention relates to the technical field of visibility, in particular to a visibility analysis method based on camera images. Background technique [0002] The definition of daytime meteorological visibility by the World Meteorological Organization and the China Meteorological Administration refers to the maximum distance that a person with normal vision can see and identify the target object from the sky background under the prevailing weather conditions. It refers to being able to see and recognize the outline and shape of the target object. Anyone who cannot see the outline or shape of the target object clearly, or the luminous point of the target light is blurred and the light is scattered, cannot be counted as "visible". ". In the definition of visibility, the so-called "recognition" refers to seeing the outline of the target object clearly, and it can also refer to the brightness contrast (Contrast) observed by the human eye being greater ...

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Application Information

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IPC IPC(8): G06T7/00G06T5/00G06T7/11G06T7/13
CPCG06T7/0002G06T5/002G06T5/008G06T7/11G06T7/13G06T2207/10016G06T2207/20192G06T2207/30256
Inventor 邹兰军
Owner 藏龙信息科技(苏州)有限公司
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