Salient point-based arrangements

• US 8,848,970 B2
• Filed: 11/02/2011
• Issued: 09/30/2014
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Digimarc Corporation
• Original Assignee: Digimarc Corporation
• Inventors: Aller, Joshua V., Brandis, Robert Craig
• Primary Examiner(s): Repko, Jason M
• Assistant Examiner(s): Potts, Ryan P
• Application Number:
  US13/287,856
• Publication Number:
  US 20120275642A1
• Time in Patent Office: 1,063 Days
• Field of Search: None
• US Class Current: 382/100
• CPC Class Codes: G06F 3/04886 by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus
• CPC Class Codes: G06Q 30/0641 Shopping interfaces
• CPC Class Codes: G06T 1/005 Robust watermarking, e.g. average attack or collusion attack resistant
• CPC Class Codes: G06T 1/0092 Payload characteristic determination in a watermarking scheme, e.g. number of bits to be embedded
• CPC Class Codes: G06T 2201/0065 Extraction of an embedded watermark; Reliable detection
• CPC Class Codes: G06T 2207/10004 Still image; Photographic image
• CPC Class Codes: G06T 2207/30244 Camera pose
• CPC Class Codes: G06T 7/73 using feature-based methods
• CPC Class Codes: H04M 1/72403 with means for local support of applications that increase the functionality
• CPC Class Codes: H04M 2250/04 including near field communication means, e.g. RFID
• CPC Class Codes: H04M 2250/52 including functional features of a camera constructional features concerning the integration of cameras in portable phones H04M1/0264
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 1/32203 Spatial or amplitude domain methods H04N1/32309 takes precedence
• CPC Class Codes: H04N 2201/3225 of data relating to an image, a page or a document
• CPC Class Codes: H04N 2201/3269 of machine readable codes or marks, e.g. bar codes or glyphs

Abstract

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.

Claims

1. A method comprising:

in a portable device, receiving identification data sensed from a passive chip device associated with an object; and

by reference to said identification data, obtaining a previously-established second set of data;

wherein the second set of data comprises salient points, said salient points comprising, for each of plural salient points;

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.

2. The method of claim 1 that further includes the portable device sensing the identification data from the passive chip device.

3. The method of claim 1 wherein the object comprises a poster.

4. The method of claim 1, wherein the second set of data further comprises reference position data associated with the object, and the method includes determining position data for the portable device by reference to said reference position data and said salient points, wherein a user of the device can interact with the object in a position-dependent manner.

5. The method of claim 4 in which said determining position data comprises determining first position data and determining second position data, and the method further includes presenting on a screen of the device a first set of information when said first position data for the portable device has been determined, and presenting on the screen of the device a second, different, set of information when said second position data has been determined.

6. The method of claim 1, wherein the identification data includes reference position data associated with the object, and the method includes determining position data for the portable device by reference to said reference position data and said salient points, wherein a user of the device can interact with the object in a position-dependent manner.