Method and device for inserting and of brief of a mark in the pharmaceutical

摘要

The method involves multi-resolution spectral breaking down (E1) of image data, extraction (E2) of a frequency sub-band, spectrally transforming it (E3) and choosing (E4) a sub-group of coefficients of the transformation. The coefficients are modulated (E5) to insert supplementary information and an inverse spectral transformation of the coefficients, including the modulated sub-group, is performed before recombining the marked image data. Independent claims are included for a device for inserting supplementary information, a method and device for decoding the information, a digital signal processing device equipped to implement the insertion method, a digital photography device, a computer and database management system, a scanner, and a medical imaging device.