Safety early warning method and system based on multi-lane vehicle distance detection

Abstract

The invention discloses a safety early warning method and system based on multi-lane vehicle distance detection, and the method comprises the steps: obtaining the braking distance of a target vehicle,carrying out vehicle marking of a video image at a current moment in a multi-lane road in front of the target vehicle, and carrying out perspective transformation of the video image to obtain an aerial view; according to pixel points between the target vehicle position and the marked vehicle position in the horizontal direction and the vertical direction in the aerial view, obtaining the actual length between the target vehicle position and the marked vehicle position in the horizontal direction and the vertical direction in combination with the corresponding relational expression, and then obtaining the actual distance between the target vehicle and the marked vehicle; and realizing safety early warning of the target vehicle by comparing the actual distance with the braking distance of the target vehicle. According to the method provided by the invention, the characteristics of perspective transformation are considered, the high-precision actual distance between the target vehicle and the marked vehicle is further obtained, and analysis and judgment are performed, so that the safety early warning method is simple and high in accuracy.

Description

technical field [0001] The invention relates to the technical field of intelligent driving, in particular to a safety early warning method and system based on multi-lane distance detection. Background technique [0002] With the development of the economy, the mileage of highways and the number of cars are also increasing. Cars not only improve the modern living standards of human beings, but also are an important factor in promoting economic development. However, with the increase of the number, the accident rate on the expressway is also rising, which poses a great threat to the safety of people's lives and properties. Therefore, it is particularly important to carry out targeted analysis and effective prevention of expressway traffic accidents. [0003] In the prior art, when early warning highway traffic accidents, radar ranging, ultrasonic ranging, laser ranging, and visual ranging are used to detect the distance between the vehicle and other vehicles on the road. The...

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Problems solved by technology

[0003] In the prior art, when early warning highway traffic accidents, radar ranging, ultrasonic ranging, laser ranging, and visual ranging are used to detect the distance between the vehicle and other vehicles on the road. The radar and laser ranging methods are expensive and are easily affected by the external environment, so it is difficult to popularize them in civilian applications; the ultrasonic vehicle distance method is only suitable for single-lane middle-vehicle distance measurement, and has a great impact on the measurement environment. The requirements are high, and the return speed is slow, it is difficult to perform distance detection during high-speed driving, and the detection accuracy is low, and the accuracy of early warning is low

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