Patent 6950519 was granted and assigned to Digimarc on September, 2005 by the United States Patent and Trademark Office.
An image is digitally watermarked to convey position data about the subject of the image, such as latitude, longitude and elevation of a point depicted therein. Additional information, e.g., about camera attributes, camera angle, and 3D warp-characterizing polynomial coefficients, can also be included.