SALIENT POINT-BASED ARRANGEMENTS

摘要

A variety of methods and systems involving sensor-equipped portable devices, such as smartphones and tablet computers, are described. One particular embodiment decodes a digital watermark from imagery captured by the device and, by reference to watermark payload data, obtains salient point data corresponding to an object depicted in the imagery. Other embodiments obtain salient point data for an object through use of other technologies (e.g., NFC chips). The salient point data enables the device to interact with the object in a spatially-dependent manner. Many other features and arrangements are also detailed.

主权项

1. A method comprising:
receiving a first set of data corresponding to imagery captured by a camera-equipped portable device, the imagery depicting an object; decoding steganographically-encoded digital watermark payload data from the first set of data; and by reference to said payload data, obtaining a previously-established second set of data; wherein the second set of data comprises salient point data, said salient point data comprising, for each of plural salient points on the object: location information for said point on the object; and orientation information for said point on the object, and/or information representing a feature vector associated with said location.