New patents are issued by the USPTO on Tuesdays. This week's Spotlight Patents concern aspects of digital watermarking. Assigned to Virginia Venture Industries, the first patent addresses techniques for embedding and decoding three-dimensional watermarks into stereoscopic images. Assigned to The Sixth Flag, the second patent addresses techniques for secure content and document watermarking.
10,051,145, "Embedding and decoding three-dimensional watermarks into stereoscopic images," assigned to Virginia Venture Industries, LLC.
Disclosed inventions relates to methods and systems for encoding at least one watermark into a stereoscopic conjugate pair of images. An example method comprises the step of encoding the at least one watermark by shifting selected pixels of said pair of images in one or more directions. The one or more directions include a horizontal direction. In the disclosed embodiments, ancillary information is not required to support decoding of encoded watermarks in addition to the transmitted left and right images.
10,049,421, "Secure content and document watermarking," assigned to The Sixth Flag, Inc.
According to one aspect, the subject matter described herein includes a method for secure content watermarking. The method includes generating a watermark that encodes information as a set of visual elements; receiving content that represents a graphical workspace to be displayed to a user; creating watermarked content by combining an image of the received content with at least one copy of the watermark sufficient to fill the area of the image; and displaying the watermarked content to the user via a display device having a display area. Should the user take a screenshot or take a picture of some or all of the watermarked content, the picture so acquired will contain watermark information that can be used to identify the session from which the picture or screenshot was taken.