Vehicle device and method for determining vehicle-distance

Abstract

The invention discloses a vehicle device and a method for measuring the space between vehicles, and aims to increase the measurable range of the space between vehicles, further improves the measurement result of the space between vehicles, and enables the security of vehicle in running to be improved. The invention provides the vehicle device including: an image acquiring unit used for acquiring images; a license plate detection unit used for detecting the images and determining the size of the license plate images in the images; and a vehicle space detection unit used for determining the space between the vehicle where the device is mounted and the vehicle which the license plate images belong to according to the size of the license plate images and the actual size of the license plate. The vehicle device and the method are used for measuring the space between vehicles, automatically determining longer space between vehicles, improving the security of vehicle in running, and facilitating the driving operations of a driver.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an automobile device and a method for determining the distance between vehicles. Background technique [0002] In the process of driving a car, it is sometimes necessary to measure the distance between the car the driver is driving and other cars in order to achieve the purpose of safe driving. [0003] In the prior art, vehicle-mounted radar is often used to measure the distance between vehicles or to measure the distance between the vehicle and nearby objects. The transmitting device in the radar actively emits infrared rays or ultrasonic waves, etc., and the infrared rays or ultrasonic waves will be reflected back to the corresponding infrared rays or ultrasonic waves when they encounter objects. The distance between objects can be determined by the time interval or phase difference with the infrared or ultrasonic wave received. [0004] For example, the reversing r...

AI Technical Summary

Problems solved by technology

[0005] However, when using radar to measure the distance between cars driving on the road, there will be great limitations, because the speed of cars driving on the road is relatively fast, and the distance between cars is relatively long, and the radar emitted Infrared rays or ultrasonic waves often cannot reach the opponent's car, so reflections cannot be formed, and the purpose of measuring the distance between vehicles cannot be achieved

Moreover, when the radar is used to measure the distance between vehicles, it is often affected by other objects, that is to say, the radar cannot identify the car, and it will perform distance detection on all objects that can be reached by the emitted infrared rays or ultrasonic waves. Therefore, using radar to measure Vehicle distance can sometimes cause false positives

[0006] To sum up, when the existing technology is used to measure the distance between vehicles, only the distance between vehicles in a relatively short range can be measured, and the measurement effect is poor

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