06947571 is referenced by 563 patents and cites 30 patents.

A cell phone is equipped with a 2D optical sensor, enabling a variety of applications. For example, such a phone may also be provided with a digital watermark decoder, permitting decoding of steganographic data on imaged objects. Movement of a phone may be inferred by sensing movement of an imaged pattern across the optical sensor's field of view, allowing use of the phone as a gestural input device through which a user can signal instructions to a computer-based process. A variety of other arrangements by which electronic devices can interact with the physical world are also detailed, e.g., involving sensing and responding to digital watermarks, bar codes, RFIDs, etc.

Title
Cell phones with optical capabilities, and related applications
Application Number
9/571422
Publication Number
6947571 (B1)
Application Date
May 15, 2000
Publication Date
September 20, 2005
Inventor
Megan I Livermore
Portland
OR, US
Geoffrey B Rhoads
West Linn
OR, US
Agent
Digimarc Corporation
Assignee
Digimarc Corporation
OR, US
IPC
G11B 023/28
H04N 001/32
H04K 001/00
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