The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2018
Filed:
Nov. 12, 2015
Blackberry Limited, Waterloo, CA;
Nazih Almalki, Waterloo, CA;
Robert George Oliver, Waterloo, CA;
BlackBerry Limited, Waterloo, Ontario, CA;
Abstract
A method for estimating the location of a mobile device in an indoor facility is disclosed. The method includes receiving a first sequence of image frames captured by a first camera, the first sequence of image frames being captured when the first camera is substantially faced toward a ceiling of the indoor facility; for each pair of consecutive image frames in the first sequence: identifying a transformation between the pair of image frames, and correlating the transformation with an estimated change in position of the mobile device; obtaining a first sequence of displacements based on the estimated changes in position of the mobile device for the pairs of consecutive image frames in the first sequence; and determining the current location of the mobile device within the indoor facility based on an initial location of the mobile device and the first sequence of displacements.