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公开(公告)号：US20210090296A1
公开(公告)日：2021-03-25
申请号：US16914121
申请日：2020-06-26
Inventor： Shuang ZHANG , Xiang Liu , Bin Gao , Xiaoxing Zhu , Fan Yang , Junping Wang
Abstract: A method and apparatus for calibrating a camera are provided. A specific embodiment of the method includes: acquiring an image-point cloud sequence, the image-point cloud sequence including at least one group of an initial image and point cloud data collected at a same time, the initial image being collected by a camera provided on an autonomous vehicle and the point cloud data being collected by a radar provided on the autonomous vehicle; determining target point cloud data of initial images corresponding to groups of image-point cloud in the image-point cloud sequence; and matching the target point cloud data with the corresponding initial images in the image-point cloud sequence to determine a correction parameter of the camera.
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公开(公告)号：US11548516B2
公开(公告)日：2023-01-10
申请号：US17251168
申请日：2019-12-17
Inventor： Ning Yu , Fan Yang , Chengfa Wang , Gaifan Li
IPC: B60W40/09 , B60W40/06 , B60W40/105 , B60W40/107 , G06V20/56
Abstract: The present disclosure provides a data acquisition method, apparatus, device and computer readable storage medium. According to the embodiments of the present disclosure, determination is made as to whether a preset stable driving condition is met based on acquired driving scene data of the driving scene where the vehicle is currently located, and acquired driving behavior data; if the preset stable driving condition is met, the driving scene data and the driving behavior data are acquired at a frequency lower than a preset sampling frequency. As a result, it is possible to reduce data redundancy in similar scenes and similar diving modes, reduce the amount of data, reduce occupation of the storage resources and transmission resources and facilitate subsequent analysis, and it is possible to implement the dynamic acquisition of driving scene data and driving behavior data by scenes and modes.
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13.发明授权公开(公告)号：US11527155B2
公开(公告)日：2022-12-13
申请号：US17003587
申请日：2020-08-26
Inventor： Xuan Huang , Fan Yang , Qiqi Xu , Chengfa Wang , Yongyi Sun , Hui Yuan
Abstract: A time-segmented signal timing method is related to the field of intelligent transportation. The specific implementation is: obtaining traffic volume data of a target intersection in each period of time of N consecutive days, N being an integer greater than 1; performing curve fitting on the traffic volume data to determine a traffic volume curve corresponding to the target intersection of each day; determining calculating respective target points in the traffic volume curve with second derivatives satisfying a preset condition; and performing time-segmented signal timing on a traffic light at the target intersection based on time points corresponding to the respective target points.
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公开(公告)号：US11468769B2
公开(公告)日：2022-10-11
申请号：US16926313
申请日：2020-07-10
Inventor： Xuan Huang , Fan Yang , Yongyi Sun , Chengfa Wang , Hui Yuan , Qiqi Xu
Abstract: A method and an electronic device for detecting a vehicle queue length are disclosed. The method includes: when determining that a traffic light turns green, obtaining vehicle information of each vehicle on a lane section to be detected in a first preset time period before a time point when the traffic light turns green; determining at least one vehicle that has a static position and a static time point on the lane section to be detected; determining a first queuing vehicle and a last queuing vehicle on the lane section to be detected based on the at least one vehicle that has the static position and the static time point on the lane section to be detected; and determining a vehicle queue length on the lane section to be detected based on a position of the first queuing vehicle and a position of the last queuing vehicle.
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