A device, such as a cell phone, uses an image sensor to capture image data. The phone can respond to detection of particular imagery feature (e.g., watermarked imagery, barcodes, image fingerprints, etc.) by presenting distinctive graphics on a display screen. Such graphics may be positioned within the...http://www.google.ca/patents/US7991157?utm_source=gb-gplus-sharePatent US7991157 - Methods and systems responsive to features sensed from imagery or other data
