Xerox Corporation

Other

John Seely Brown

Daniel P Huttenlocher

William James Rucklidge

Daniel Gureasko Bobrow

Dan S Bloomberg

Ronald M Kaplan

Todd A Cass

William D Turner

M Margaret Withgott

Ralph C Merkle

Martin Kay

William M Newman

Malcolm J Thompson

Maurice F Holmes

Per-Kristian G Halvorsen

Steven C Bagley

John R White

Richard J Beach

Dorothy M Brown

A processor is provided with a first set of digital information that includes a first structured representation of a document. From the first set of digital information, the processor produces a second set of digital information that includes a second structured representation of the document. The second structured representation is a lossless representation and includes a set of tokens and a set of positions. At least one token in the plurality of tokens has an associated semantic label which may be a character code associated with various font types in the second structured representation of the document. The semantic label may be obtained and stored in the second structured representation of the document by a computer program. The first and second representations may be resolution dependent structured representations and have, respectively, first and second characteristic resolutions. The first representation, but not the second, is provided in digital form to an untrusted recipient. A search for particular content of the second representation, including semantic labels, is requested by the recipient. A highlighted version of the first representation of the document is then provided to the recipient.

Relabelling of tokenized symbols in fontless structured document image representations

Relabeling of tokenized symbols in fontless structured document image representations

A method in which first and second representations of a document are provided, for example, by being made available on one or more server computers connected to a computer network, such as the Internet or a corporate intranet. The first and second representations are resolution-dependent structured representations and have, respectively, first and second characteristic resolutions, the second resolution being greater than the first. The first representation, but not the second, is provided in digital form to an untrusted recipient. For example, the first representation can be transmitted through the network from the server on which the first representation is available to a client computer connected to the network. The second representation is converted to a third representation of the document, the third representation being a representation in a human-readable, nondigital form. For example, the second representation can be transmitted through the network in a secure manner to a trusted printing facility connected to the network. The trusted facility can then produce the third representation, for example by printing a hardcopy representation of the document. Finally, the third representation, but not the second, is provided to the untrusted recipient, for example, by physically transferring the third representation to the untrusted recipient.

Using fontless structured document image representations to render

A method and apparatus for applying morphological image criteria that identify image units in an undecoded document image having significant information content, and for retrieving related data that supplements the document either from elsewhere within the document or a source external to the document. The retrieved data can result from character code recognition or template matching of the identified significant image units, or the retrieved data can result directly from an analysis of the morphological image characteristics of the identified significant image units. A reading machine can allow a user to browse and select documents or segments thereof, and to obtain interactive retrieval of documents and supplemental data.

Method and apparatus for supplementing significant portions of a

Digital machine readable full color specifications of full color source images are embedded in the printed hardcopy versions of those images; typically through the use of a self-clocking glyph code to minimize the visual impact of the embedded data. This color specification then can be recovered from a hardcopy version of the original source image, even if the hardcopy is monochromatic. Thus, a digital highlight color copier can use this color specification to index into a plurality of different full-color to highlight-color transformse to select the transform or transorms that are most appropriate for rendering a highlight color copy of the source image.

Embedded data controlled digital highlight color copier

The present invention is a digital imaging system for a copier that comprises a full-frame, two-dimensional sensor array to capture a document's image and a full-frame output light valve with backlight to flash expose the image onto a photoreceptor belt. The document is flash exposed to illuminate the page and the full-page image is captured by the full-frame, two dimensional sensor array. The sensor array then reads out the digital image data in response to a driver. The data is then input into the full-frame digital output light valve. The driver provides for the synchronous control of the system. Optionally, an electronic subsystem may perform digital image processing according to user demand--before the data arrives at the output light valve. After image processing (if any), the digital data, supplied to the full-page output light valve, forms a pattern on the display according to the data. The patterned image is then flash exposed by a backlight, through the light valve, and onto a photoreceptor.

Digital imaging system using two-dimensional input sensor array and

A system for authenticating a hard copy of an original document. The system employs a special copying machine at the sender's end together with a special ID card (smart card) or other user identification for activating the special machine, and a special copying machine at the receiving end. At the sender's station, the original document and ID card are inserted into the machine. The latter digitizes the document text, to produce a digital signature which incorporates unique information from the sender's ID card. This machine then produces a hard copy of the document to which is added the digital signature. The sender retains the original, but forwards the copy to the recipient or receiver. The receiver then inserts the received copy into the machine at his location, which digitizes and processes the document text and signature and indicates whether the digital signature is valid. Preferably a dual key authentication system is used, with the digital signature incorporating the sender's secret signing key, and the receiver using the related public key in the validation process.

Document copy authentication

An improved interconnecting toy which, through its various uses, provides various educational experiences to the user and which comprises a game piece (1) with joined tubular members comprised of connective ends; and which comprises a game piece (2) with joined tubular member comprised of connective ends. The connective ends may be of the male or female type (7 and 6 respectively). The tubular members may be circumferentially configured in any geometric shape, and may consist of any variety of colors; and the tubular members may be imprinted or decalled with numeric, alphabetic, or logo-type designations, all of which enhance the educational experience that results from use of the invention.

Interconnecting toy

Growing community of inventors

Palo Alto, CA, United States of America

John Seely Brown