Eastman-kodak Company

Robert B Bayley

Victor C Wong

Badhri Narayan

Robert S Jones

Donald R Williams

Robert V Reisch

Vishwas G Abhyankar

Robert Breslawski

Richard Weil

Robert G Duncan

Margaret Jones Helber

Nelson Adrian Blish

Louis S Horvath

Christopher E Wheeler

Lou Horvath

Michael Kent Coil

Louis G Horvath

Nelson G Blish

A method for preserving a digitally signed document () in a digital data preservation system (). A secure preservation request () combines the document () with a preservation signature () that is generated using an identification mark () and the document's associated digital signature (). Once the document () is authenticated by the digital preservation system vendor, both the document () and the identification mark () are recorded onto preservation media () in human-readable form.

Preservation system for digitally created and digitally signed documents

A digital preservation system () for accepting a digital data record as input, for providing a preview of the digital data record on a display screen (), for writing the data record in human-readable form onto a preservation-quality medium (), for storage of the medium (), and for retrieval of the data record from the medium (. The digital preservation system () preserves a data record in human-readable form, along with an associated metadata record, allowing the human-readable preserved data record to be readable in the distant future, independent of specific reading hardware. A preview function allows an operator to specify storage and retrieval characteristics for the data record.

Preview function in a digital data preservation system

A digital preservation system () for accepting a digital data record as input, for providing a preview of the digital data record on a display screen (), for writing the data record in human-readable form onto a preservation-quality medium (), for storage of the medium (), and for retrieval of the data record from the medium (). The digital preservation system () preserves a data record in human-readable form, along with an associated metadata record, allowing the human-readable preserved data record to be readable in the distant future, independent of specific reading hardware. The preview function allows an operator to specify storage and retrieval characteristics for the data record.

A method for decoding data that has been encoded in a monochrome medium utilizing the capability of the medium for grayscale resolution. A document is processed to provide an image in electronic format, in which each pixel has an assigned data value with a given bit depth. A mapping operation is performed for generating a monochrome data word (), preferably having a reduced bit depth. The monochrome data word () can be used to encode multiple data fields (). A printer () then produces a preserved document record () in which the appropriate monochrome data word () determines the grayscale value for each pixel. To decode the stored data, a scanner () is employed to obtain the grayscale value from the preserved document record (). For each pixel, the grayscale value is then decomposed into multiple data fields (), which can then be decoded to provide the information that was originally encoded.

Method of decoding data encoded in a monochrome medium

An apparatus and method for printing images from a digital image source onto a photosensitive medium () using one or more two-dimensional light-emissive arrays () such as OLED arrays. Each image pixel has a corresponding light-emitting element which is assigned a variable intensity based on data for that pixel. Imaging optics () direct the light from each light-emitting element onto the photosensitive medium () so that a monochromatic or multicolor image can be formed with a single exposure.

Apparatus and method for printing using a light emissive array

A method for encoding data in a monochrome media utilizing the capability of the media for grayscale resolution. A document is processed to provide an image in electronic format, in which each pixel has an assigned data value with a given bit depth. A mapping operation is performed for generating a monochrome data word (), preferably having a reduced bit depth. The monochrome data word () can be used to encode multiple data fields (). A printer () then produces a preserved document record () in which the appropriate monochrome data word () determines the grayscale value for each pixel.

Method of encoding data in a monochrome media

A black and white photographic element contains a filter dye of Formula (I): ##STR1## wherein each R.sup.1 is independently substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, cyano, hydroxy, carboxy, substituted or unsubstituted amido, or substituted or unsubstituted sulfonamido; n is 1-4; R.sup.2 is H, substituted or unsubstituted alkyl or amido; each of R.sup.3 and R.sup.4 is independently hydrogen or substituted or unsubstituted alkyl; and M is a cation.

Black and white photographic element

A radiation-sensitive emulsion is disclosed capable of producing the highest attainable speed compatible with low granularity. The silver halide grains (a) have a mean equivalent circular diameter of less than 0.6 .mu.m; (b) have a face centered cubic crystal lattice structure of the rock salt type; (c) have six {100} faces; (d) contain from 95 to 99.5 mole percent bromide ions and from 0.5 to 5 mole percent iodide ions, based on silver; (e) contain in the face centered cubic crystal lattice structure from 5.times.10.sup.-8 to 1.times.10.sup.-6 mole per silver mole of an iridium dopant comprised of Ir.sup.+3 ions forming coordination bonds with at least five halide ions occupying adjacent crystal lattice positions; and (f) contain in the face centered cubic crystal lattice structure from 1.times.10.sup.-5 to 3.times.10.sup.-4 mole per silver mole of a speed enhancing dopant comprised of divalent Group 8 metal ion chosen from among Fe.sup.+2, Ru.sup.+2 and Os.sup.+2 and at least one coordination ligand more electron withdrawing than fluoride ion; (g) the speed enhancing dopant is located in at least a portion of an internal region of the grains formed after 70 percent and before 90 percent of total grain silver has been precipitated and (h) the iridium dopant is located in at least a portion of a central region of the grains and is separated from the speed enhancing dopant by an interposed region containing at least 10 percent of the total grain silver.

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Hilton, NY, United States of America

Robert B Bayley