The invention concerns a method of processing a set of coefficients representing a digital image (300) with a view to an insertion of at least one item of watermarking information in said image, this image being liable to undergo a set of geometric transformations and said coefficients being grouped...http://www.google.com/patents/US6990213?utm_source=gb-gplus-sharePatent US6990213 - Method and device for processing and watermarking a set of coefficients representing a digital image
