Abstract:
The present invention relates to steganographically hiding messages in media signals such as video and audio signals. In one implementation, a method of decoding an encoded media signal to extract a plural-bit auxiliary signal therefrom is provided. The media signal includes a plurality of intervals, with the plural-bit auxiliary signal being steganographically encoded in at least some of the intervals. Once encoded in the media signal the plural-bit auxiliary signal is generally imperceptible to a human observer of the encoded media signal. The encoding includes subtle changes to at least some portions of the media signal to thereby represent the plural-bit auxiliary signal. The method includes receiving the encoded media signal; and decoding the received encoded media signal to extract the plural-bit auxiliary signal therefrom. The decoding analyzes a plurality of intervals of the media signal with greater or lesser confidence in the extracted multi-bit auxiliary data signal being obtained by processing more or less intervals of the encoded media signal, respectively.
Abstract:
An image of a sample print printed to obtain parameters is picked up by using “a parameter obtaining device” that meets the standards of an instrument for the invention of “the electronic scrap system.” Then, the picked-up image is captured by a DTP system, and color data of a needed position are imported to a parameter DB. Thereby, parameters for simulation to be used in an invisible code printing support system can be easily inputted. Use of this method eliminates the necessity of figuring out parameters through experiments and the like, and of inputting these parameters as numerical values. In addition, since this method uses a physical medium and inks to be actually used, as they are, their optical characteristics, an influence of a blue component of invisible light emitted from an ultraviolet LED, and the like can be inputted all together as a picked-up image. Accordingly, it becomes possible to input parameters capable of accurately reproducing actual printed conditions, and thereby to produce printed materials providing high reading accuracy.
Abstract:
The present invention relates generally to watermarking. In one implementation a method of pre-analyzing a digital signal for encoding digital watermarks using a digital filter comprising determining what changes in the digital signal will be affected by the digital filter is provided. In another implementation a system for pre-analyzing a digital signal for encoding at least one digital watermark using a digital filter is provided. The method includes a processor for identifying an area of the digital signal that will be affected by the digital filter; and an encoder for encoding the at least one digital watermark in the digital signal, the encoder encoding the at least one digital watermark so as to avoid the at least one area of the digital signal that will be affected by the digital filter. Other implementations are provided as well.
Abstract:
The disclosure describes methods for using digital watermarking to authenticate digital media signals, such as images, audio and video signals. It also describes techniques for using embedded watermarks to repair altered parts of a media signal when alteration is detected. Alteration is detected using hashes, digital watermarks, and a combination of hashes and digital watermarks.
Abstract:
A system for enabling user interaction with computer software. The system includes a printer for receiving print data, printing a form, using the print data, with information related to an interactive element coincident with coded data indicative of the interactive element, receiving indicating data from a sensing device which is generated by the sensing device sensing the coincident coded data so as to be indicative of the interactive element, and transfer the indicating data to a computer system to allow the interaction to be interpreted. The coded data is indicative of an identity. The computer system determines, using the indicating data, the identity, determines, using the identity, a page description, and identifies, using the page description, the interactive element.
Abstract:
This patent application is generally related to watermarking and steganography. One claim recites a method of transmarking a media signal previously embedded with a first digital watermark using a first digital watermark embedding method. The method includes: utilizing a programmed electronic processor, detecting the first digital watermark in the media signal; converting the media signal to a different format; utilizing a programmed electronic processor, embedding detected message information from the first digital watermark into a second digital watermark in the converted media signal such that the second digital watermark is adapted to robustness or perceptibility parameters associated with the new format. Of course, other combinations and claims are provided as well.
Abstract:
A sensing device for sensing coded data on a surface is provided having marking and non-marking nibs for contact with the surface, a selection mechanism for moving the nibs relative to each other to select which nib contacts the surface, an image sensor for sensing the coded data, memory for storing respective identities of the nibs, and a processor for identifying the selected nib from the stored nib identities and processing the sensed coded data. The coded data is encoded in coded tags printed across the surface and indicates the position of that tag on the surface and an identity of the surface which is associated with a digital description of the surface maintained by a processing device. The processor determines an orientation and a position of the sensing device relative to the surface from the sensed coded data and the digital description.
Abstract:
A method of delivering a facsimile is provided. The method starts by printing, by a printer, a document on a substrate. The document has printed thereon visible user information and invisible coded tags. Each tag encodes an identity of the document and a location of the tag on the substrate. A sensing device senses the printed coded tags when the sensing device is moved relative to the document by a user so as to compose a message. The message is electronically captured by the sensing device using the identity of the document and a sequence of the respective locations of tags sensed by the sensing device. The message is then transmitted to a recipient address for facsimile delivery.
Abstract:
A method of enabling user interaction with computer software including, in a computer system transferring print data to a printer, printing a form responsive to the print data by printing information indicative of a text field coincident with coded data indicative of the text field, so that when a sensing device is moved relative to the text field the sensing device can sense the coded data and generate the indicating data indicative of its relative movement, using the indicating data to determine the movement and then perform an action associated with the text field based on the movement. Further in the computer system, the information, an identity indicative of the text field, and a layout defining an arrangement for coded data indicative of the identity and information are determined, and the print data is generated to be indicative of the identity, layout and information.
Abstract:
A method of enabling user interaction with computer software including, in a computer system, transferring print data to a printer, printing a form responsive to the print data by printing information indicative of a text field coincident with coded data indicative of the text field, so that when a sensing device is moved relative to the text field the sensing device can sense the coded data and generate the indicating data indicative of its movement relative to the text field, using the indicating data to determine the movement and then perform an action associated with the text field based on the movement. The coded data is indicative of an identity and, in the computer system, the identity is determined using the indicating data, a page description is determined using the identity, and the text field is identified using the page description.