Aligning ground based images and aerial imagery

摘要

Systems and methods for aligning ground based images of a geographic area taken from a perspective at or near ground level and a set of aerial images taken from, for instance, an oblique perspective, are provided. More specifically, candidate aerial imagery can be identified for alignment with the ground based image. Geometric data associated with the ground based image can be obtained and used to warp the ground based image to a perspective associated with the candidate aerial imagery. One or more feature matches between the warped image and the candidate aerial imagery can then be identified using a feature matching technique. The matched features can be used to align the ground based image with the candidate aerial imagery.

主权项

1. A computer-implemented method of aligning a ground based image with aerial imagery, the method comprising:
obtaining, by one or more computing devices, a ground based image of a geographic area captured from a perspective at or near ground level; identifying, by the one or more computing devices, candidate aerial imagery of the geographic area; transforming, by the one or more computing devices, the ground based image to a warped image by projecting an image plane of the ground based image to an image plane associated with the candidate aerial imagery based at least in part on geometric data associated with the ground based image; identifying, by the one or more computing devices, one or more feature matches between the warped image and the candidate aerial imagery; and aligning, by the one or more computing devices, the ground based image with the candidate aerial imagery based at least in part on geometric data associated with the one or more feature matches.