Methods and systems responsive to features sensed from imagery or other data

摘要: A device, such as a cell phone, uses an image sensor to capture data. The phone can respond detection of particular imagery feature (e.g., watermarked imagery, barcodes, fingerprints, etc.) by presenting distinctive graphics on display screen. Such may be positioned within the display, and affine-warped, in registered relationship with position detected feature, its affine distortion, depicted Related approaches implemented without use sensor, e.g., relying data sensed from RFID device. Auditory output, rather than visual, also employed. variety other features arrangements are detailed.