METHOD OF ENCODING DATA IN MONOCHROME MEDIA

摘要

PROBLEM TO BE SOLVED: To provide a method for encoding data about a document received in an electronic format in a monochrome media. SOLUTION: This method is one 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 an 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 (120), preferably having a reduced bit depth. The monochrome data word (120) can be used to encode multiple data fields (114, 116 and 118). A printer (92) then produces a preserved document record (90) in which the appropriate monochrome data word (120) determines the grayscale value for each pixel. COPYRIGHT: (C)2004,JPO