Abstract:
Methods for adapting the operation of a system in response to the detection of embedded watermarks from a digital host content are provided. A digital host content is received and examined for the presence of watermarks. In response to the detection of embedded watermarks and in accordance with the value, type, density or spacing of the detected watermarks, one or more system reactions may take place. These reactions include conditionally allowing the system to resume its normal operation, prohibiting the system from resuming its normal operation, degrading the quality of the digital host content or changing the security status of the digital host content. In response to the extraction of weak watermarks that do not meet the desired system requirements, the extraction operation may be modified or extended to enable the detection of strong watermarks.
Abstract:
The present invention relates to digital watermarking systems and methods. In a first implementation, so-called movie studio rough-cuts are watermarked to provide a forensic tracking clue or to provide security for distributed rough-cuts. In another implementation, a watermark is determined for a compressed video object. The watermark is compressed as an object and the watermarked object is then associated with the compressed video object. The two separate objects are provided to a rendering device, which after decompressing both objects, embeds the watermark in the video prior to rendering.
Abstract:
Although a copying machine which has finally output a forged print can be specified by the forgery tracking function, a copying machine which has output an original used for copying or a scanner used to read the images of bills or securities cannot be specified. For this purpose, history information embedded in input image data is extracted. When the history information is extracted, information unique to the apparatus is added to the history information. When no history information is extracted, history information containing information unique to the apparatus is generated. The generated or updated history information is embedded in the image data.
Abstract:
An imaging apparatus includes an image data generation unit for generating image data; a verification data generation unit for generating first verification data for detecting a change in the image data; a first connection unit capable of being connected to a recording medium that records both the image data and the first verification data; and a second connection unit capable of being connected to an image verification apparatus that has a function to generate second verification data for detecting a change in the image data.
Abstract:
After a digital content is loaded into an information terminal such as a PC, ID information unique to a viewer or a user of the PC is imprinted into the content. The ID information is imprinted into a predetermined location of the content or alternatively, it may be imprinted over the entire content in the form of a spatial frequency. The content with an ID added thereto is then enabled to be used in the terminal.
Abstract:
A watermark system includes an embedder, detector, and reader. The watermark embedder encodes a watermark signal in a host signal to create a combined signal. The detector looks for the watermark signal in a potentially corrupted version of the combined signal, and computes its orientation. Finally, a reader extracts a message in the watermark signal from the combined signal using the orientation to approximate the original state of the combined signal. While adapted for images, video and audio, the watermark system applies to other electronic and physical media. For example, it can be applied to mark graphical models, blank paper, film and other substrates, texturing objects for ID purposes, etc.
Abstract:
A system for creating non-repudiation (undeniable) watermarks, wherein a content provider uses outside distribution entities to distribute media content supplied by the content provider. Content watermarked by a distribution entity using this system is undeniably recognizable by the content provider as originating with that particular distribution entity. In other words, given N distribution entities, the content provider is able to tell which particular distribution entity watermarked the media content. The system does not allow any distribution entity to watermark media content so that would appear to have been watermarked by another distribution entity and the system does also not allow the content provider to watermark media content so that would appear to have been watermarked by a particular distribution entity. Consequently, this allows the content provider to place a high degree of trust in the identification of the distribution entity by means of the watermark.
Abstract:
An image capture device is provided with processing circuitry that steganographically embeds plural-bit auxiliary data within the captured image data. The embedding may be accomplished by adding a low level noise signal to the image data, where the noise signal has the auxiliary data encoded therein. Image data output by the device thus conveys auxiliary data that can be used for a variety of purposes.
Abstract:
A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifies the multimedia content or the content family. A second digital watermark is embedded in an audio channel of the multimedia content. The second digital watermark uniquely identifies a user or user device. When the multimedia content is found in an unauthorized or unexpected channel, the content can be traced back to its misappropriating source via the user identifier.
Abstract:
A method of removing fixed pattern noise derives an estimate of fixed pattern noise from a composite media signal and uses the estimate to evaluate and remove fixed pattern noise from selected frames. The technique is particularly suited for removing fixed pattern noise in images due to image capture processes, but applies to other media signals as well. In watermarking applications, the method can be used to improve detection and recovery of a watermark. Also, it may be used to remove components of a watermark or a watermark from a cover signal that contains two or more different watermarks.