Hewlett-packard Development Company, L.p.

Srinivasan Ramani

Anil Kv Kumar

Anjaneyulu Seetha Rama Kuchibhotla

Srinivasu Godavari

Darpan Goel

Badri Narayanan Ranganathan

Yogesh Sankarasubramaniam

Nagabhushana Ayyanahalli Matad

Andrea Colaco

A method of and system for verifying a document, the method comprising generating verification information for the document, comparing the verification information with authentic verification information, and identifying differences between the document and an authentic document.

Document verification method and system

A physical document comprising a human-readable part and a machine-readable part, wherein the machine-readable part comprises markup that describes information on at least one of the document and data within the human-readable part.

Document and method of producing a document

A method for preparing and verifying a document, comprising the steps of: presenting the document to a document-registering office in a machine-readable format; editing the document to add an identification code associated with a non-copiable object; signing the edited document using a private key of the document-registering office; printing the digitally signed document in a machine-readable form; presenting the document and the object to an inspecting authority; recovering the digitally signed document from the machine-readable form of the printed document; verifying the digital signature of the document-registering office; and verifying that the identification code in the document corresponds to that of the presented object.

Method and apparatus for preparing and verifying documents

An information access device is disclosed comprising an interface for connecting the information access device to a network; a further interface for providing the information access device with a string of information request indicators; an interpretation layer for extracting an information source from the string and for generating an instruction for triggering a different application of the device to retrieve the information from the information source; and a processor for executing the generated instruction.

Information access device and network

A document processing method comprises adding document markers to predetermined locations of an electronically stored document. These are printed with the document. The document is scanned and the scanned document markers are used to process the scanned image. This processing comprises at least pixel threshold setting, and determination of the locations of the scanned image which are to be processed to derive the pixels of a digital version of the document. This enables local deformations in the paper document to be corrected, and enables correct thresholds for the printing and scanning operations to be applied. The electronically stored document can be processed to derive a set of document properties which can be used when constructing the digital version.

Processing of printed documents

A method of independently encoding an image with two information channels comprises generating an image which encodes a primary information channel based on brightness levels. The image is modified to encode a secondary information channel. This image modification comprises applying one of two image output values to the image portion, wherein the brightness of a modified image portion is not changed such as to change the primary information channel encoding.

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Karnataka, India

Srinivasan Ramani