Dynamically variable machine readable binary code and method for reading and producing thereof

• US 5,329,107 A
• Filed: 06/30/1992
• Issued: 07/12/1994
• Est. Priority Date: 05/05/1988
• Status: Expired due to Fees

• Current Assignee: Siemens Energy & Automation Incorporated (Siemens AG)
• Original Assignee: International Data Matrix Incorporated
• Inventors: Priddy, Dennis G., Cymbalski, Robert S.
• Primary Examiner(s): McGraw, Vincent P.
• Application Number:
  US07/907,769
• Time in Patent Office: 742 Days
• Field of Search: 235/494
• US Class Current: 235/494
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 2019/06262 with target- or other orientation-indicating feature
• CPC Class Codes: G06K 7/14 using light without selection of wavelength, e.g. sensing reflected white light G06K7/10831 - G06K7/1097 take precedence

Abstract

A machine readable binary code which is dynamically variable in size, format and density of information is provided. The binary code is formed as a matrix having a perimeter and data contained therein. The perimeter is provided with density indicia for indicating the density of data contained within the matrix. The perimeter is also provided with size indicia for indicating the size of the matrix. By utilizing the density indicia and size indicia, a scanning device is able to calculate the size and information density of the binary code.

Claims

1. A dynamically variable machine optically readable binary code comprising data in a plurality of data cells forming a matrix having a perimeter, said matrix having a variable number of data cells, said perimeter including density indicia for determining the density of data contained within the matrix, said density indicia being disposed in said perimeter and indicating said density independently of the positioning of said data cells contained in the matrix.

2. The binary code of claim 1, wherein the density indicia means for indicating the density of the data includes a first side of the perimeter and a second side of the perimeter, each being formed of an identical broken line pattern formed of alternating dark areas and light areas, a third side and a fourth side intersecting at a corner, the product of the number of said light areas and dark areas of the first side and the number of light areas and dark areas of the second side corresponding to the density of data contained within the matrix.

3. The binary code of claim 1, wherein the data is formed of light and dark visual cells.

4. The binary code of claim 3, wherein the data is arranged in a predetermined pattern and further including data indicia means for indicating the predetermined pattern of the data.

5. A machine optically readable binary code comprising data formed as a matrix, the perimeter of the matrix including size indicia means for indicating the physical size of the matrix, the size indicia means including a first side of the perimeter and a second side of the perimeter, said first side and second side each being formed as a solid line, the first side and second side intersecting at a first corner and corresponding to the orientation of the matrix.

6. The binary code of claim 5, further comprising density indicia means located at the perimeter for indicating the density of data contained within the matrix.

7. The binary code of claim 5, further comprising indicia means for indicating the distribution pattern of the data within the matrix.

8. The binary code of claim 6, wherein the density indicia means for indicating the density of the data includes a third side of the perimeter and a fourth side of the perimeter, each being formed of an identical broken line pattern formed of alternating dark areas and light areas, said third side and fourth side intersecting at a second corner, the product of the number of said light areas and dark areas of the third side and the number of said light areas and dark areas of the fourth side corresponding to the density of data contained within the matrix.

9. The binary code of claim 8, wherein the matrix is a rhombus.

10. The binary code of claim 8, wherein the matrix is a square.

11. The binary code of claim 7, wherein the pattern is a predetermined pattern and the indicia means includes a distribution key within the matrix, said distribution key containing the code corresponding to the predetermined pattern.

12. The binary code of claim 6, wherein the data contained within the matrix is provided within the matrix a plurality of times.

13. The binary code of claim 6, wherein the data contained within the matrix is compressed.

14. A machine optically readable binary code comprising data formed as a matrix, the perimeter of the matrix including size indicia means for indicating the physical size of the matrix, orientation indicia means for indicating the orientation of the matrix relative to the optical field, the orientation indicia means including a first side of the perimeter and a second side of the perimeter, said first side and second side each being formed of a solid line of equal lengths, the first side and second side intersecting at a first corner, said first corner defining the orientation of the matrix.