Hewlett-packard Development Company, L.p.

Chit Wei Saw

Jonathan Yen

Doron Shaked

Cormac Herley

Slawomir K Ilnicki

Joyce E Farrell

Christian J Van Den Branden Lambrecht

Joan Maria Mas Ribes

Hui Chao

Giordano Bruno Beretta

Clayton Atkins

Avraham Levy

Gerald Q Maguire, Jr

Avi Levy

Yihong Xu

A system for distributing digital content over a computer network (e.g., the Internet) uses certificates to establish a trust relationship between a content provider and a display device. The certificates identify the display device and the content provider as well as unique characteristics of the distribution. For example, the content provider may be a book publisher and the display device may be a printer/binder.

Digital content distribution systems

Systems and methods for generating and decoding authenticatable graphical bar codes are described. In one aspect, a corroborative signed message is generated from information to be encoded, and a base image is modulated with a graphical encoding of the signed message to produce a marked image. In another aspect, a signed message is extracted from a marked image based upon a comparison of the marked image and a base image. The extracted signed message is decoded to produce a decoded message. Information encoded in the marked image is extracted from the decoded message and authenticated.

Authenticatable graphical bar codes

Payment indicia generating schemes are described that enable users to customize the appearance of the payment indicium and to accommodate a wide variety of validation processing environments, while providing a substantial defense against fraudulent photocopy attack. In some embodiments, a corroborative digital token is generated from payment information, and a base image is modulated with a graphical encoding of the corroborative digital token to produce a payment indicium. In some embodiments, a payment indicium containing embedded payment information is rendered on a printing surface with a printing characteristic that degrades with photographic reproductions such that the embedded payment information is extractable from an original rendering of the payment indicium but is un-extractable from a photographic reproduction of an original rendering of the payment indicium. In some embodiments, payment information is encoded into a corroborative digital token based at least in part upon one or more variable encoding parameters, and a payment indicium containing the encoded payment information is rendered.

Scalable, fraud resistant graphical payment indicia

Cover authoring systems and methods for automatically composing a final content layout for a cover, including spinal content formatted to accommodate the width and height dimensions of the book spine, are described. By automatically computing the typeface parameter values based upon the selected visual fit model, this cover authoring scheme enables users to avoid the time consuming, laborious and expensive process of manually composing the final cover content layout with a conventional graphics program.

Cover authoring systems and methods and bookbinding systems incorporating the same

Fiducial mark patterns for graphical bar codes (i.e., images that contain inconspicuous graphical modulations that encode embedded information) that are characterized by high detection robustness and good local deformation tracking are described. In one bar coding method, a base image is modulated with a graphical encoding of a message to produce a graphical bar code, and a fiducial mark pattern comprising a plurality of dots arranged to track one or more reference locations and local deformation across the graphical bar code is generated. In another bar coding method, fiducial mark candidates are identified in a fiducial mark pattern, a fiducial mark path is computed based upon one or more of the identified fiducial mark candidates, and one or more reference locations are identified based upon the computed fiducial mark path.

Fiducial mark patterns for graphical bar codes

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Cupertino, CA, United States of America

Chit Wei Saw