Patent ID: 7130442
Filing Date: 2006-10-31
Classification: G06T,H04N

Abstract:
1. A method for imparting a watermark onto a digitized image, said method comprising: providing a digitized image having at least one image plane, said image plane being represented by an image array having a plurality of pixels, each pixel in said plurality of pixels having at least one color component, said watermark being formed using a distinct watermarking plane represented by an array having a plurality of distinct watermarking elements, each of said distinct watermarking elements having an array position and having one-to-one positional correspondence with said image pixels, and multiplying brightness data associated with said at least one color component by a predetermined brightness multiplying factor, wherein said brightness multiplying factor is a corresponding distinct watermarking element, and said watermark has a invisibility classification, wherein said brightness multiplying factor has a relationship with a number taken from a random number sequence.