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公开(公告)号：US12236691B2
公开(公告)日：2025-02-25
申请号：US17698721
申请日：2022-03-18
Applicant: HERE Global B.V.
Inventor： Zhenhua Zhang , Qi Mao , Xiaoying Jin , Lin Gan , Sanjay Kumar Boddhu
Abstract: An approach is provided for lane width estimation from incomplete lane marking detections of a road lane. The approach, for example, involves generating one or more perpendicular lines respectively from location centers of one or more first lane marking detections. A respective lane marking detection represents at least a portion of a boundary of the road lane as a line delimited by two location data points in accordance with detections by at least one sensor device onboard at least one vehicle. The approach also involves identifying second lane marking detections that each respectively intersect one of the one or more perpendicular lines. The approach further involves selecting one or more candidate lane widths based on one or more respective distances from the location centers to the second lane marking detections. The approach further involves determining an estimated lane width of the road lane based on the one or more candidate lane widths.
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公开(公告)号：US11189032B2
公开(公告)日：2021-11-30
申请号：US16837747
申请日：2020-04-01
Applicant: HERE Global B.V.
Inventor： Di Ma , Lin Gan , Fangzhou Xiong , Sanjay Boddhu
Abstract: A method, apparatus and computer program product are provided for extracting building footprints for buildings based on satellite imagery. In this regard, a segmentation map is generated by performing an image segmentation on satellite imagery depicting at least one building. A plurality of line segments that correspond to edges of the at least one building are also generated. Furthermore, a contour for each of the at least one building is generated by filtering line segments corresponding to the at least one building based on the respective principle direction. The geographic data for each of the at least one building is then extracted based on the respective contour.
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公开(公告)号：US20210312632A1
公开(公告)日：2021-10-07
申请号：US16837747
申请日：2020-04-01
Applicant: HERE Global B.V.
Inventor： Di Ma , Lin Gan , Fangzhou Xiong , Sanjay Boddhu
Abstract: A method, apparatus and computer program product are provided for extracting building footprints for buildings based on satellite imagery. In this regard, a segmentation map is generated by performing an image segmentation on satellite imagery depicting at least one building. A plurality of line segments that correspond to edges of the at least one building are also generated. Furthermore, a contour for each of the at least one building is generated by filtering line segments corresponding to the at least one building based on the respective principle direction. The geographic data for each of the at least one building is then extracted based on the respective contour.
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