Two-dimensional code having superior decoding property which is possible to control the level of error correcting codes, and method for encoding and decoding the same

• US 20060231635A1
• Filed: 06/13/2006
• Published: 10/19/2006
• Est. Priority Date: 10/31/2002
• Status: Active Grant

• Current Assignee: Inconlab Incorporated
• Original Assignee: Inconlab Incorporated
• Inventors: Kim, Kyoung-Tae, Kwon, Dong-Jin
• Granted Patent: US 7,281,660 B2
• Time in Patent Office: Days
• US Class Current: 235/494
• CPC Class Codes: G06K 19/06037 multi-dimensional coding
• CPC Class Codes: G06K 19/06131 the marking comprising a target pattern, e.g. for indicating the center of the bar code or for helping a bar code reader to properly orient the scanner or to retrieve the bar code inside of an image
• CPC Class Codes: G06K 7/0163 by means of additional timing marks on the record-carrier
• CPC Class Codes: G06K 7/1417 2D bar codes
• CPC Class Codes: G06K 7/1443 locating of the code in an image
• CPC Class Codes: G06K 7/1456 determining the orientation of the optical code with respect to the reader and correcting therefore
• CPC Class Codes: G06K 7/1473 error correction

Abstract

Two-dimensional Code having superior decoding property which is possible to control the level of error correcting codes, and method for encoding and decoding the two-dimensional Code is provided. The two-dimensional code includes finding pattern area comprised finding patterns for discriminating the code area from whole image, timing pattern area comprised timing patterns for checking a position of data area from the whole code and positions of each cells of the data area, and data area inputted various kinds of data and decoding information of data itself.

Claims

1. A method for encoding of two-dimensional code comprising:

a step for inputting encoding-information objected to be encoded;

a step for decision a number of each codeword according to said information;

a step for generating each codeword; and

a step for encoding data of said generated codeword.

2. The method for encoding of two-dimensional code as claimed in claim 1 further comprising a step for said data blocking after said data encoding.

3. The method for encoding of two-dimensional code as claimed in claim 1, wherein said inputted encoding information objected to be encoded comprises objected data, size of cell and error correcting codes.

4. The method for encoding of two-dimensional code as claimed in claim 1, said decision number of each codeword comprises a total codeword number, data codeword number, and reed-solomon codeword number according to a value inputted in said step for inputting information objected to be encoded.

5. The method for encoding of two-dimensional code as claimed in claim 1, wherein said each codeword is generated to use said information inputted in said step for inputting encoding-information and a pad character.

6. The method for encoding of two-dimensional code as claimed in claim 1, wherein said data encoding is started to an ASCII encoding mode, and encoded that continuous two figures are double density and Korean alphabet is Korean encoding mode.

7. The method for encoding of two-dimensional code as claimed in claim 1, wherein a BCH code is supplemented to the data area of the code in case that total number of cell in data area are more than 81.

8. The method for encoding of two-dimensional code as claimed in claim 1, wherein said data are blocked to sequentially stack by basic unit of 3 bytes.

9. The method for encoding of two-dimensional code as claimed in claim 1, wherein said encoded data is at least one more among a figure, mark, Korean alphabet, English alphabet, special character or byte information.