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

• US 5,126,542 A
• Filed: 12/13/1990
• Issued: 06/30/1992
• Est. Priority Date: 05/05/1988
• Status: Expired due to Term

• Current Assignee: Microscan Systems Inc (Omron Corporation)
• Original Assignee: International Data Matrix Incorporated
• Inventors: Priddy, Dennis G., Cymbalski, Robert S.
• Primary Examiner(s): Trafton, David
• Application Number:
  US07/627,080
• Time in Patent Office: 565 Days
• Field of Search: 235/436, 235/456, 235/470, 235/494, 235/487, 235/432, 369/100
• US Class Current: 235/456
• 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. An apparatus for executing operations on an electronic computer binary language code, said apparatus comprising means for receiving said electronic computer binary language code, said code being formed as a first bit stream of electronic binary values and each bit being in at least one of two states, and means for directly converting said electronic binary values to visual binary values and generating an optically machine readable binary code in said computer binary language in response to the received computer binary language code, said optically machine readable binary code comprising data formed as a matrix, said matrix being formed from said visual binary values as a plurality of visual data cells, said visual data cells being in at least one of two states directly corresponding to the two states of said first bit stream and forming a visual bit stream in said computer binary language code.

2. The apparatus of claim 1, wherein a subset of data cells represents a single binary character, and said data cells representing a set of binary characters.

3. The apparatus of claim 1, wherein a subset of said data cells represents a single binary character, and the number of data cells required to visually represent said single binary character is less than eight.

4. The apparatus of claim 1, wherein a subset of said data cells represents a single binary character, and the number of data cells required to visually represent said single binary character is more than eight.

5. The apparatus of claim 1, wherein the visual cells form the US ASCII representation of said electronic computer binary language code.

6. The apparatus of claim 1, wherein said data cells are aligned in a predetermined pattern within said matrix.

7. A method for forming a machine optically readable binary code in a computer binary language code having data formed as a matrix, said data being formed as visual data cells from a data string formed of an electronic computer binary language code, said visual data cells being electronic computer binary code in visual form comprising the steps of:

receiving said electronic computer binary language code as a data string of electronic ones and zeros; and

directly converting said electronic computer binary language code from an electronic binary data string of ones and zeros to a binary string of light and dark data cells in a matrix which visually represent said string of ones and zeros as relatively dark and light visual cells to form said machine optically readable binary code in computer binary language code.

8. The method for forming a machine optically readable binary code of claim 7, wherein a subset of said visual data cells represent a single binary character.

9. The method for forming a machine optically readable binary code of claim 8, further comprising the step of defining a maximum range of binary characters that may appear at each position within said data string and suppressing said ones and zeros which are common to the entire range of binary characters and then calculating the minimum number of data cells required to visually represent a maximum number of binary variations for representing said binary characters.

10. The method of claim 9, further comprising the step of selectively increasing the number of visual cells representing each of said binary characters.

11. The method of claim 10, further comprising the step of selectively increasing the number of visual cells as a single discrete unit.

12. The method of claim 10, further comprising the step of selectively increasing the number of visual cells as multiple discrete units.

13. A method for determining the location and orientation of a machine optically readable code formed of a plurality of visual data cells, the code having an identifiable perimeter comprising the steps of:

scanning said code and a surrounding area of said code;

converting said scanned image into a digitized image; and

conducting a binary search of said digitized image to locate said identifiable perimeter;

calculating the position of each visual data cell relative to said identifiable perimeter; and

calculating the position of the center of each of said visual data cells.

14. The method of claim 13, wherein the binary search includes the step of searching the digitized image for a user definable pattern sequence.

15. The method of claim 13, wherein said identifiable perimeter includes at least a first solid line and a second solid line, said first solid line intersecting said second solid line forming a first corner.

16. The method of claim 15, further comprising the steps of measuring the length of said first solid line, measuring the length of said second solid line, measuring the angle at which said first solid line intersects said second solid line, and calculating the position of a second corner of said code on said perimeter opposite said first corner.

17. An apparatus for scanning a machine optically readable binary code in computer binary language code, said apparatus comprising means for receiving an optically machine readable binary code in computer binary language code, said machine optically readable binary code being formed as a matrix, said matrix being formed as a plurality of visual data cells forming a bit stream, each visual cell being in one of at least two states, conversion means for directly converting said visual data cells to electronic binary values forming an electronic computer binary language code.

18. The apparatus of claim 17, wherein a subset of said data cells represent a single binary character, said data cells representing a set of binary characters.

19. The apparatus of claim 17, wherein a subset of said data cells represent a single binary character, the number of data cells required to visually represent said single binary character being less than eight.

20. The apparatus of claim 17, wherein a subset of said data cells represent a single binary character, the number of data cells required to visually represent said single binary character being more than eight.

21. The apparatus of claim 17, wherein the visual data cells form the US ASCII representation of said binary code.