Distributed dimensional labeling for dimensional characterization of border-type embedded data blocks

• US 5,929,429 A
• Filed: 05/15/1996
• Issued: 07/27/1999
• Est. Priority Date: 01/03/1995
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Petrie, Glen W.
• Primary Examiner(s): LEE, MICHAEL GUNYOUNG
• Application Number:
  US08/649,748
• Time in Patent Office: 1,168 Days
• Field of Search: 235/494, 235/454, 235/456, 235/487
• US Class Current: 235/494
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 7/143 Glyph-codes

Abstract

A border-type embedded data block is decomposed so that it can be dimensionally characterized by address codes that are applied to the embedded data characters that define its lattice-like synchronization frame. The border-type embedded data block is composed of a self-clocking glyph code pattern. This glyph code pattern may be implemented by slash-like symbols which provide a grayscale appearance when viewed under normal conditions.

Claims

1. A process for dimensionally characterizing an embedded data block that has an interior region that is free of embedded data, said process comprising the steps

providing a lattice-like synchronization frame of embedded data characters that are on substantially uniform centers edge-to-edge of said embedded data block, including from inside edge-to-outside edge, along a first set of parallel paths and along a second set of parallel paths that are orthogonally oriented with respect to said first set,

encoding at least one address code in the embedded data characters on said one set of paths and at least one additional address code in the embedded data characters on said second set, thereby enabling the data block to be dimensionally characterized in decomposed parts that surround said interior region.

2. The process of claim 1 wherein said embedded data block is composed of a self-clocking glyph code pattern.

3. The process of claim 2 wherein said glyph code pattern is composed of slash-like symbols, said symbols being written on said recording medium on substantially uniformly spaced centers.

4. The process of claim 3 wherein said glyph code pattern has a substantially uniform grayscale appearance when viewed under ordinary viewing conditions.