Patent ID: 7266216

Claim:
A method comprising inserting a watermark into at least one derived image, including the steps of: providing a source digital image having at least one image plane, each said image plane being represented by an array having pixel brightness data for a plurality of pixels, each of said pixels having at least one color component and having a pixel position; specifying the horizontal and vertical dimensions of a bounding rectangle, determining an enlargement or reduction first factor f 1 that, if applied, would resize the source image by enlargement or reduction of its horizontal and vertical dimensions so that the resized image is a largest replica of said digitized image fitting entirely within the bounding rectangle; forming an adjusted invisible image watermark that is enlarged or reduced by a second factor f 2 ; resizing the source image by enlargement or reduction of its horizontal and vertical dimensions by a combined factor, f 1 times f 2 , to form an alternative adjusted digital image.