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公开(公告)号：EP0660261A3
公开(公告)日：1998-09-16
申请号：EP94309085
申请日：1994-12-06
Applicant: XEROX CORP
Inventor： HECHT DAVID L , STEARNS RICHARD G
CPC classification number: G06K7/143 , G06K19/06037
Abstract: A self-clocking glyph code (31) is composed of data glyphs (34) which encode logically ordered data values, together with one or more multi-glyph synchronization code patterns (33). Each of the synchronization code patterns (33) is distinguishable from the data glyphs (34), but the synchronization code pattern (33) or patterns provide an explicit spatial reference for the data glyphs. To this end, the glyphs (37) of the synchronization code pattern (33) or patterns are written on the recording medium (35) in accordance with the same spatial formatting rule as the data glyphs (34), plus at least one additional formatting rule that establishes a predetermined geometric relationship between the glyphs of the synchronization code pattern or patterns (33) and corresponding ones of the spatially formatted data glyphs (34), such that the logical order of at least a significant number (>> 1)of the data glyphs (34) is inferable from the synchronization code pattern or patterns (33). Preferably, each of the synchronization code patterns (33) is composed of glyphs (37) that are selected from the same finite symbol set as the data glyphs (34), so the synchronization code pattern or patterns (33) typically are defined by glyph patterns that have a suitably high statistical probability of being unique with respect to any pattern of data glyphs.
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公开(公告)号：EP0660260A3
公开(公告)日：1998-09-16
申请号：EP94309083
申请日：1994-12-06
Applicant: XEROX CORP
Inventor： HECHT DAVID L , PETRIE GLEN W
CPC classification number: G06K7/143 , G06K19/06037
Abstract: An optically readable record (35) for storing encoded information comprises (1) a recording medium (35), (2) a self-clocking data code (32) for encoding the information, with this data code (32) being composed of glyphs (34) that are written in a bounded two dimensional code field on said recording medium (35) on centers that are spatially distributed in nominal accordance with a predetermined spatial formatting rule, and the glyphs (34) being defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode said information, and (3) a self-clocking address pattern (33) written on said recording medium (35) to extend across said code field along at least one axis, with this address pattern being composed of unique a glyph patterns (37) that disambiguates spatiallogical position within said address pattern (33) to a subpattern precision.
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公开(公告)号：DE69430517T2
公开(公告)日：2002-10-31
申请号：DE69430517
申请日：1994-12-06
Applicant: XEROX CORP
Inventor： HECHT DAVID L , STEARNS RICHARD G
Abstract: A self-clocking glyph code (31) is composed of data glyphs (34) which encode logically ordered data values, together with one or more multi-glyph synchronization code patterns (33). Each of the synchronization code patterns (33) is distinguishable from the data glyphs (34), but the synchronization code pattern (33) or patterns provide an explicit spatial reference for the data glyphs. To this end, the glyphs (37) of the synchronization code pattern (33) or patterns are written on the recording medium (35) in accordance with the same spatial formatting rule as the data glyphs (34), plus at least one additional formatting rule that establishes a predetermined geometric relationship between the glyphs of the synchronization code pattern or patterns (33) and corresponding ones of the spatially formatted data glyphs (34), such that the logical order of at least a significant number (>> 1)of the data glyphs (34) is inferable from the synchronization code pattern or patterns (33). Preferably, each of the synchronization code patterns (33) is composed of glyphs (37) that are selected from the same finite symbol set as the data glyphs (34), so the synchronization code pattern or patterns (33) typically are defined by glyph patterns that have a suitably high statistical probability of being unique with respect to any pattern of data glyphs.
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公开(公告)号：DE69428420D1
公开(公告)日：2001-10-31
申请号：DE69428420
申请日：1994-12-06
Applicant: XEROX CORP
Inventor： HECHT DAVID L , PETRIE GLEN W
Abstract: An optically readable record (35) for storing encoded information comprises (1) a recording medium (35), (2) a self-clocking data code (32) for encoding the information, with this data code (32) being composed of glyphs (34) that are written in a bounded two dimensional code field on said recording medium (35) on centers that are spatially distributed in nominal accordance with a predetermined spatial formatting rule, and the glyphs (34) being defined by respective symbols that are selected from a finite set of optically discriminable symbols to encode said information, and (3) a self-clocking address pattern (33) written on said recording medium (35) to extend across said code field along at least one axis, with this address pattern being composed of unique a glyph patterns (37) that disambiguates spatiallogical position within said address pattern (33) to a subpattern precision.
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公开(公告)号：DE69230027T2
公开(公告)日：2000-03-30
申请号：DE69230027
申请日：1992-12-21
Applicant: XEROX CORP
Inventor： HECHT DAVID L , STEARNS RICHARD G , PRASADAM FLORES NOAH L
IPC: G06K1/12 , G06K19/06 , G06V30/224 , G06K9/18
Abstract: A self-clocking glyph code (23) is provided for encoding n-bit long digital values (where n>1) in a logically ordered sequence of composite glyphs (31a-31d) that are written, printed, or otherwise recorded on a hardcopy recording medium in accordance with a predetermined spatial formatting rule. As used herein, a "composite glyph" is a graphical symbol that has a plurality of predefined, substantially orthogonal, graphical characteristics; each of which is capable of assuming any one of a plurality of predefined graphical states. An n-bit long digital value is distributively encoded in a glyph of this type by decomposing its n-bits, prior to or during the encoding, into a plurality of shorter, ordered, non-overlapping bit strings. The digital values of these bit strings, in turn, are encoded in the states of respective graphical characteristics of the composite glyph in a predetermined logical order, thereby preserving the logical ordering of the bit strings.
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Patent Agency Ranking
公开(公告)号：DE69126369T2
公开(公告)日：1997-12-11
申请号：DE69126369
申请日：1991-05-30
Applicant: XEROX CORP
Inventor： ZDYBEL FRANK , HENDERSON D AUSTIN , SANG HENRY W , HECHT DAVID L , PEDERSEN JAN O , BLOOMBERG DAN S , SMITH Z EROL
Abstract: Provision is made in electronic document processing systems for printing unfiltered or filtered machine-readable digital representations of electronic documents, and human-readable renderings of them on the same record medium using the same printing process. The integration of machine-readable digital representations of electronic documents with the human-readable hardcopy renderings of them may be employed, for example, not only to enhance the precision with which the structure and content of such electronic documents can be recovered by scanning such hardcopies into electronic document processing systems, but also as a mechanism for enabling recipients of scanned-in versions of such documents to identify and process annotations that were added to the hardcopies after they were printed and/or for alerting the recipients of the scanned-in documents to alterations that may have been made to the original human-readable content of the hardcopy renderings. In addition to storage of the electronic representation of the document, provision is made for encoding information about the electronic representation of the document itself, such as file name, creation and modification dates, access and security information, printing histories. Provision is also made for encoding information which is computed from the content of the document and other information, for purposes of authentication and verification of document integrity. Provision is also made for the encoding of information which relates to operations which are to be performed depending on handwritten marks made upon a hardcopy rendering of the document; for example, encoding instructions of what action is to be taken when a box on a document is checked. Provision is also made for encoding in the hardcopy another class of information: information about the rendering of the document specific to that hard copy, which can include a numbered copy of that print, the identification of the machine which performed that print, the reproduction characteristics of the printer, the screen frequency and rotation used by the printer in rendering halftones. Provision is also made for encoding information about the digital encoding mechanism itself, such as information given in standard-encoded headers about subsequently compressed or encrypted digital information.
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公开(公告)号：DE69215200T2
公开(公告)日：1997-03-20
申请号：DE69215200
申请日：1992-12-14
Applicant: XEROX CORP
Inventor： HECHT DAVID L
Abstract: Increasing the addressing capability of an optical image bar (40) having a particular pixel center-to-center spacing (pixel pitch) is accomplished by employing a plurality of N electrodes (115a,b; 117a,b; 118a,b; 120a,b) per pixel (112,113). Compared to an optical image bar with one electrode per pixel, this provides N times as many locations for the electric potential transition which establishes the center of the pixel. The provision of multiple electrodes per pixel interval can be used to implement interlacing.
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公开(公告)号：DE60022969D1
公开(公告)日：2005-11-10
申请号：DE60022969
申请日：2000-12-04
Applicant: XEROX CORP
Inventor： HECHT DAVID L , GORBET MATTHEW G , FLORES L NOAH , BANERJEE SHILAJEET
Abstract: Apparatus, methods and articles of manufacture consistent with the present invention, provide a registration scheme wherein a first set of information on a substrate having embedded data embodied thereon is registered with a second set of information, based on the embedded data. In accordance with this registration scheme, an image capture device (470) captures an image that includes embedded code and causes a display to be created that includes a combination of the captured image and information that augments the image with additional information. The additional information is registered with the captured image in the combined display.
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公开(公告)号：DE69825388T2
公开(公告)日：2004-12-16
申请号：DE69825388
申请日：1998-10-16
Applicant: XEROX CORP
Inventor： FLEET DAVID J , HEEGER DAVID J , CASS TODD A , HECHT DAVID L
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公开(公告)号：DE68920420D1
公开(公告)日：1995-02-16
申请号：DE68920420
申请日：1989-12-21
Applicant: XEROX CORP
Inventor： HECHT DAVID L , SPRAGUE ROBERT A
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