INFORMATION CODING AND DECODING IN SPECTRAL DIFFERENCES

摘要

Information is encoded in an image signal by exploiting spectral differences between colors that appear the same when rendered. These spectral differences are detected using image sensing that discerns the spectral differences. Spectral difference detection methods include using sensor-synchronized spectrally-structured-light imaging, 3D sensors, imaging spectrophotometers, and higher resolution Bayer pattern capture relative to resolution of patches used to convey a spectral difference signal.

主权项

1. A method for encoding an information signal in spectral differences within an image signal, the method comprising:
generating an information signal; mapping the information signal to locations within a host image signal; and at the locations, inserting the information signal by computing values for color components at the locations so as to form a spectral difference signal that conveys the information signal within the host image, the spectral difference signal representing a distinguishable spectra between two or more colors that appear similar in the human visual system at the insertion locations within the host image signal.