Matching an approximately located query image against a reference image set using cellular base station and wireless access point information

摘要

Aspects of the disclosure pertain to matching a selected image/photograph against a database of reference images having location information. The image of interest may include some location information itself, such as latitude/longitude coordinates and orientation. This location information may be based on information obtained when the user's device interacts with base stations or other access points in a wireless communication network, such as signal strength information. The location information is used as an estimated location. The image of interest and the estimated location are used to select one or more cells to match the image against. Each cell may have multiple images and an index. The image is compared against specific cells, and if a match is found, a front end server identifies the correct location and orientation of the received image, and may correct errors in the estimated location of the user device.

主权项

1. A computer-implemented method comprising:
obtaining, using one or more computing devices, (i) an image of an object and (ii) one or more signal strength measurements that indicate a strength of a signal broadcast by a particular base station; determining a value that reflects a quantity of base stations in a vicinity of the particular base station; determining, using the one or more computing devices, an uncorrected location associated with the image based at least on the one or more signal strength measurements and the value that reflects the quantity of base stations in the vicinity of the particular base station; identifying, using the one or more computing devices, from among a collection of reference images that are each associated with a respective location, a set of reference images that are each associated with the uncorrected location associated with the image determined based at least on the one or more signal strength measurements and the value that reflects the quantity of base stations in the vicinity of the particular base station; identifying, using the one or more computing devices, a subset of the reference images that are classified as images of the object; and generating, using the one or more computing devices, a corrected location to associate with the image of the object based on the respective locations associated with the reference images of the subset.