Microsoft Technology Licensing, LLC

Stephen James Cosman

Shawn Michael Brown

Robert Pengelly

Suhel Sheikh

Exemplary embodiments for performing server-assisted object recognition and tracking are disclosed herein. For example, in certain embodiments of the disclosed technology, one or more objects are efficiently recognized and tracked on a mobile device by using a remote server that can provide high capacity computing and storage resources. With the benefit of high-speed image processing on a remote server and high-bandwidth communication networks connecting the mobile device and the remote server, it is possible to identify an object and to track changes in the object's characteristics or location, so that a user experiences seamless, real-time tracking.

Server-assisted object recognition and tracking for mobile devices

Techniques and tools are described for performing perspective correction using a reflection. Reflective properties of a surface being photographed can be used to determine a rotation of the device taking the photograph relative to the surface. Light sourced or produced by the device can be used to create a reflection spot in the picture. A position of the reflection spot within the picture is calculated and used to determine the rotation. The rotation can be used for performing perspective correction on the picture, or on another picture taken by the device.

Perspective correction using a reflection

Embodiments enable geofencing applications and beacon watch lists. A computing device with at least a first processor and a second processor identifies a set of beacons associated with a geofence. The first processor consumes less power when operating than the second processor. The first processor is provided with the identified set of beacons. In beacon watch list embodiments, the first processor detects one or more beacons proximate to the computing device, compares the detected beacons with the provided set of beacons to determine whether the computing device is within the geofence, and updates a location status based on the comparison. In tiered geofencing implementations, the computing device switches among positioning modalities based on a distance from the computing device to the geofence to save power.

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Seattle, WA, United States of America

Stephen James Cosman