公开(公告)号：US20170219370A1

公开(公告)日：2017-08-03

申请号：US15488540

申请日：2017-04-17

Applicant: Google Inc.

Inventor： Brian Edmont Brewington ,  Bryan M. Klingner ,  David Martin ,  Kirk L. Johnson

IPC: G01C21/36 ,  G01S17/89 ,  G01C21/00 ,  G06K9/00 ,  G06F17/40 ,  G06T17/05 ,  G06T7/73

CPC classification number: G01V11/00 ,  G01C21/00 ,  G01C21/005 ,  G01C21/3644 ,  G01C21/3694 ,  G01D21/00 ,  G01S17/89 ,  G06F17/40 ,  G06F19/00 ,  G06K9/00664 ,  G06K9/00671 ,  G06T7/73 ,  G06T17/05

Abstract: Systems and methods for identifying prominent landmarks in a geographic area are provided. More particularly, geographic imagery data, such as panoramic images captured by a camera from a perspective at or near ground level, can be analyzed to identify landmarks depicted in the geographic imagery data. For instance, structure-from-motion techniques can be used to generate a point cloud of tracked features that are located a threshold distance away from one or more camera perspectives associated with the geographic imagery data. Landmarks that are visible from multiple camera perspectives and that are visible from greater distances relative to one or more camera perspectives can be identified as prominent landmarks in a geographic area. A geographic information system can use the prominent landmarks for a variety of purposes, such as for use in providing travel directions, for rendering landmarks in an emphasized style, and/or for constructing/displaying a three-dimensional model of the landmark.