Parking space identification method and device by using laser light knife as auxiliary light source

Abstract

The invention provides a parking space identification method and device by using a laser light knife as an auxiliary light source. The device is composed of the laser light knife, a camera, a computer and display equipment. When detection is needed, the computer gives out a control instruction first, the laser light knife is used for emitting a fan beam, and the fan beam is projected to a whole row of parking spaces to be detected to form a straight line beam which penetrates through the whole row of parking spaces transversely; the camera is used for collecting the beam images formed by the laser light knife on all the parking spaces, if one image is a section of straight line, it means that the corresponding parking space is vacant, and if the image is a section of arc placed above the straight line, it means that the corresponding parking space is occupied. The parking space identification device can be used for detecting one row of parking spaces, the image processing algorithm is simple and reliable, meanwhile, the requirement for lighting conditions is lowered, and normal detection can still be conducted even in an all-black underground parking garage.

Description

technical field [0001] The invention belongs to the technical field of position recognition, and in particular relates to a parking space recognition method and device using a laser light knife as an auxiliary light source. Background technique [0002] The automatic identification of empty parking spaces in the parking lot can improve the efficiency of parking lot management. At present, a variety of empty parking space identification methods have been applied. The commonly used methods are ultrasonic distance measurement and image recognition. The ultrasonic distance measuring method is to install an ultrasonic ranging probe above each parking space, and judge whether there is a vehicle parked under the probe by measuring the distance. The image recognition method uses a camera to capture an image and judges whether it is an empty parking space through digital image processing. This method can identify multiple parking spaces through a camera. The disadvantage is that the ...

AI Technical Summary

Problems solved by technology

The ultrasonic ranging method is to install an ultrasonic ranging probe above each parking space, and judge whether there is a vehicle parked under the probe by measuring the distance. This method is simple and reliable. The disadvantage is that an ultrasonic probe is required to be installed above each parking space.

The image recognition method uses a camera to capture an image and judges whether it is an empty parking space through digital image processing. This method can identify multiple parking spaces through a camera. The disadvantage is that the image processing algorithm is relatively complicated, and it also needs to meet certain lighting conditions.

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