Method for controlling vehicles, electronic device, and storage medium

Patent metadata

Field	Value
Publication number	US-12466406-B2
Application number	US-202318125679-A
Country	US
Kind code	B2
Filing date	Mar 23, 2023
Priority date	Dec 16, 2022
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A method for controlling vehicles, an electronic device and a storage medium are provided. In the method, a license plate image of a target vehicle in front of a vehicle to be controlled and point cloud data of the target vehicle through a radar are acquired. The license plate image is identified to obtain initial vehicle data of the target vehicle. Target vehicle data of the target vehicle is calculated based on preset ranges, vehicle data of the vehicle to be controlled, the point cloud data and the initial vehicle data. In response that the target vehicle data meets preset conditions, the vehicle data of the vehicle to be controlled is adjusted according to the target vehicle data. The method can improve an accuracy of vehicle detection and a driving safety.

First claim

What is claimed is:

1 . A method for controlling vehicles, the method comprising:
acquiring a license plate image of a target vehicle in front of a vehicle to be controlled, and acquiring point cloud data of the target vehicle through a radar; identifying the license plate image and obtaining initial vehicle data of the target vehicle, the initial vehicle data comprising a first relative distance between the target vehicle and the vehicle to be controlled and a speed of the target vehicle, wherein identifying the license plate image and obtaining initial vehicle data of the target vehicle comprises: identifying the license plate image and determining a vehicle type of the target vehicle; acquiring a first size of the license plate of the target vehicle according to the vehicle type; processing the license plate image and obtaining a processed image; calculating the first relative distance according to a focal length of a photographing device that captures the license plate image, the first size of the license plate of the target vehicle and the processed image; calculating the speed of the target vehicle according to any two adjacent first relative distances and two shooting times of the license plate images corresponding to the any two adjacent first relative distances; calculating target vehicle data of the target vehicle based on preset ranges, vehicle data of the vehicle to be controlled, the point cloud data and the initial vehicle data, comprising: calculating relative vehicle data according to the point cloud data and the vehicle data of the vehicle to be controlled; comparing the relative vehicle data with the preset ranges, and obtaining a comparison result; selecting a point cloud data weighting corresponding to the point cloud data from preset weightings according to the comparison result; calculating an initial data weighting corresponding to the initial vehicle data according to the point cloud data weighting and a preset value; obtaining the target vehicle data by calculating the relative vehicle data and the initial vehicle data, according to the point cloud data weighting and the initial data weighting; in response that the target vehicle data meets preset conditions, adjusting the vehicle data of the vehicle to be controlled according to the target vehicle data, the target vehicle data comprises a target distance and a target speed, wherein in response that the target vehicle data meets preset conditions, adjusting the vehicle data of the vehicle to be controlled according to the target vehicle data comprises: comparing the target distance with a preset safe distance, and comparing the target speed with the speed of the vehicle to be controlled; in response that the target distance is less than the preset safe distance and/or the target speed is less than the speed of the vehicle to be controlled, adjusting the speed of the vehicle to be controlled and an acceleration of the vehicle to be controlled until the target distance is greater than or equal to the preset safe distance.

2 . The method according to claim 1 , wherein calculating the first relative distance according to a focal length of a photographing device that captures the license plate image, the first size of the license plate of the target vehicle and the processed image comprises:
calculating a second size of the license plate of the processed image; calculating a first product of the focal length and the first size; determining a ratio of the first product to the second size as the first relative distance.

3 . The method according to claim 1 , wherein the relative vehicle data comprises a speed of the vehicle to be controlled and a second relative distance, wherein calculating relative vehicle data according to the point cloud data and the vehicle data of the vehicle to be controlled comprises:
acquiring a first position of the target vehicle from the point cloud data; acquiring a second position of the vehicle to be controlled from the vehicle data of the vehicle to be controlled; calculating the second relative distance according to the first position and the second position; calculating the speed of the vehicle to be controlled according to any two adjacent second relative distances and two radar scanning times corresponding to the any two adjacent second relative distances.

4 . The method according to claim 3 , wherein the preset ranges comprises a preset distance range and a preset speed range, wherein selecting a point cloud data weighting corresponding to the point cloud data from preset weightings according to the comparison result comprises:
in response that the comparison result indicates that the second relative distance is within the preset distance range and the speed of the vehicle to be controlled is within the preset speed range, determining that the point cloud data weighting being a preset first weighting; in response that the comparison result indicates that the second relative distance is within the preset distance range and the speed of the vehicle to be controlled is not within the preset speed range, determining that the point cloud data weighting being a preset second weighting; in response that the comparison result indicates that the second relative distance is not within the preset distance range and the speed of the vehicle to be controlled is within the preset speed range, determining that the point cloud data weighting being a preset third weighting; in response that the comparison result indicates that the second relative distance is not within the preset distance range and the speed of the vehicle to be controlled is not within the preset speed range, determining the point cloud data weighting being a preset fourth weighting.

5 . The method according to claim 1 , wherein obtaining the target vehicle data by calculating the relative vehicle data and the initial vehicle data, according to the point cloud data weighting and the initial data weighting comprises:
obtaining a plurality of second products by calculating a product of the point cloud data weighting and each data in the relative vehicle data; obtaining a plurality of third products by calculating a product of the initial data weighting and each data in the initial vehicle data; calculating a sum of each second product and the corresponding third product to obtain the target vehicle data.

6 . An electronic device, comprising:
a storage device and at least one processor, the storage device stores at least one computer-readable instruction, which when executed by the processor causes the at least one processor to: acquire a license plate image of a target vehicle in front of a vehicle to be controlled, and acquire point cloud data of the target vehicle through a radar; identify the license plate image and obtain initial vehicle data of the target vehicle, the initial vehicle data comprising a first relative distance between the target vehicle and the vehicle to be controlled and a speed of the target vehicle, wherein the at least one processor identifies the license plate image and obtaining initial vehicle data of the target vehicle by: identifying the license plate image and determining a vehicle type of the target vehicle; acquiring a first size of the license plate of the target vehicle according to the vehicle type; processing the license plate image and obtaining a processed image; calculating the first relative distance according to a focal length of a photographing device that captures the license plate image, the first size of the license plate of the target vehicle and the processed image; calculating the speed of the target vehicle according to any two adjacent first relative distances and two shooting times of the license plate images corresponding to the any two adjacent first relative distances;

Assignees

• Hon Hai Prec Ind Co Ltd

Inventors

• Lee Chieh
• Kuo Chin-Pin

Classifications

• B60W2420/408

  Radar; Laser, e.g. lidar · CPC title

• B60W2554/80

  Spatial relation or speed relative to objects · CPC title

• B60W2520/06

  Direction of travel · CPC title

• B60W2554/404

  Characteristics · CPC title

• G08G1/017 Primary

  identifying vehicles (G08G1/015, G08G1/054 take precedence) · CPC title