Red-light-running photo auto-screening method

Abstract

Method includes steps: photos in JPEG format taken in a road junction, at a direction by camera or digital camera are input into computer under corresponding sub directory; under the sub directory, artificial selecting a frame of photo having clear red light, clicking on the position of the red light by mouse, then computer receives the coordinate value of position of the red light and stores the value to corresponding file of parameters table; photos to be filtered called out from the said sub directory are decompressed to BMP format, reading out red, green yellow values of pixels in area set by the said parameters table in each frame of photo; if tricolor meets R greater than or equal to 80%,G is less than or equal to 20%, B is less than or equal to 20% in set area, then the frame of photo is determined as valid; The valid photo is copied to sub directory of effective photo base for printer or output to call. The method possesses features of objectivity, fairness, accuracy and fast. The invention raises work efficiency so as to release shortage of police.

Description

technical field [0001] The invention relates to a method for judging whether the photos of motor vehicle violations taken by a red light recorder are valid, in particular to an automatic screening method for photos of violations of red lights. Background technique [0002] The red light recorder, also known as the electronic police, is a device installed at urban traffic intersections to monitor and capture violations of motor vehicles running red lights. The captured photos of violations are used as an important basis for punishing violators. Those who show the illegal photos. Electronic police are divided into three main forms according to the form of imaging equipment used: optical electronic police, digital electronic police, and video electronic police. The optical electronic police use ordinary optical cameras to capture the violations of motor vehicles running red lights; the digital electronic police uses high-resolution digital cameras to capture the violations of ...

AI Technical Summary

Problems solved by technology

As ordinary optical cameras and high-resolution digital cameras are civilian products, the failure rate is high, and due to factors such as long charging time of flashlights and inability to take continuous pictures, optical electronic police and digital electronic police are rarely used.

Video electronic police is widely used because of its stability, reliability, and ability to capture the trajectory of motor vehicle violations. However, the output of the CCD camera is a video signal of 625 lines per second. The resolution of illegal photos captured by the industrial computer and image acquisition card The maximum rate is 768*288, which is much lower than that of optical cameras and digital cameras, resulting in the low resolution of illegal photos taken by video electronic police, and the phenomenon that red lights are difficult to recognize in illegal photos captured under strong sunlight during the day

These illegal photos that cannot be confirmed by the red light are usually not used as the basis for punishment

For the illegal photos captured by the electronic police at the intersection, the sorting work is usually judged and screened subjectively by human eyes. This kind of sorting method is heavy, slow and lacks scientificity. The human factor is relatively large, which seriously affects the traffic management department. work efficiency

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