6286results about "Paper-money testing devices" patented technology

A digital watermark system embeds auxiliary signals in multimedia types, including audio, still and moving images, and physical objects. These auxiliary signals, referred to as digital watermarks, include multiple components that can perform differing functions and that are embedded with different levels of redundancy, potentially within different transform domains of the host signal.

Methods and devices for dynamically assigning document parameters to output receptacles of multiple output receptacle document evaluating devices. Documents are directed into individual output receptacles based upon their document parameter or parameters. For example, according to one embodiment a currency evaluating device comprises an input receptacle adapted to receive a stack of currency bills, a plurality of output receptacles, a transport mechanism, and a processor adapted to control the operation of the device. The processor is programmed to determine the denomination of a bill and determine if an output receptacle is associated with the denomination of the bill. If an output receptacle is not associated with the denomination of the bill, the processor is programmed to associate an output receptacle with the denomination of the bill and cause the bill to be transported to an output receptacle associated with the denomination of the bill.

The disclosure describes systems for creating and authenticating printed objects using authentication and copy detection watermarks. For example, one verification system includes a watermark decoder and a verification module. The watermark decoder detects a copy detection watermark in a printed object to determine whether the printed object has been reproduced. The verification module processes a message decoded from an authentication watermark on the printed object to authenticate the printed object or bearer of the printed object. The authentication and copy detection watermarks may be implemented as the same or different watermarks. For example, the copy detection watermark may be a fragile watermark that carries the message and that degrades in response to a reproduction operation, such as photocopying or scanning and then reprinting the object. Alternatively, the authentication and copy detection watermarks may be separate watermarks embedded in an image that is printed on the object. The authentication watermark, in some applications, includes an identifier that links the object to a database entry with related information about the object. This related information can be used to check the bearer of the object by comparing it with attributes of the bearer (such as a user ID or photo) or the validity of the object by comparing it with attributes that are visible or machine readable on the object.

The present invention provides methods and systems for authenticating identification documents. We also teach an identification document including two or more digital watermarks. The watermarks correspond with each other or with indicia carried by the identification document. The correspondence can be verified to determine authenticity. We also provide digital watermark detection methods and systems to identify the different watermarks through embedded orientation components. We then focus watermark message-decoding efforts on areas identified as likely including watermark orientation components. In another implementation we provide a watermark detection trigger to identify so-called legacy documents. The trigger may indicate the presence or expected absence of a digital watermark. In other implementations we provide a versatile document authenticator to toggle between watermarking and non-watermarking authentication processes depending on a detection trigger. Other implementations are provided as well.

A method of indexing content for network searching comprises identifying media content signals stored at sites distributed over a distributed computer network; extracting content identifiers from the content signals; using the content identifiers to obtain metadata used to classify the media content signals; and creating a searchable index of the media content signals based on the metadata, wherein users access the searchable index on the distributed computer network to submit a search query for the searchable index to retrieve links to the media content signals.

Digital watermarks are embedded and decoded from host media signals like images and audio using encryption keys. The encryption keys are used to encrypt different components of the digital watermark message. The encryption keys can be used to scramble the digital watermark and components of it in alternative ways, including scrambling the mapping of the message to the host signal and scrambling carrier signals used to encode the message. Spread spectrum, feature based, and quantization based embedding and decoding schemes may be used in various combinations in the watermark encoder and decoder. Portions of the digital watermark may be encrypted to provide private watermark data, while other portions may be un-encrypted to provide public watermark data.