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.

公开(公告)号：DE69230027D1

公开(公告)日：1999-10-28

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.