Eastman-kodak Company

Robert G Duncan

Victor C Wong

Badhri Narayan

Robert S Jones

Richard Weil

Donald R Williams

Robert B Bayley

Robert V Reisch

Vishwas G Abhyankar

Robert Breslawski

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

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

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Pittsford, NY, United States of America

Robert G Duncan