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1. CN1670763 - A two dimensional bar codes and coding-decoding method thereof

Office China
Application Number 200410022052.5
Application Date 15.03.2004
Publication Number 1670763
Publication Date 21.09.2005
Grant Number 100481117
Grant Date 22.04.2009
Publication Kind C
IPC
G06K 19/06
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
CPC
G06K 19/06037
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
06009with optically detectable marking
06037multi-dimensional coding
G06K 7/1417
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7Methods or arrangements for sensing record carriers, ; e.g. for reading patterns
10by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
14using light without selection of wavelength, e.g. sensing reflected white light
1404Methods for optical code recognition
1408the method being specifically adapted for the type of code
14172D bar codes
G06K 19/06056
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19Record carriers for use with machines and with at least a part designed to carry digital markings
06characterised by the kind of the digital marking, e.g. shape, nature, code
06009with optically detectable marking
06046Constructional details
06056the marking comprising a further embedded marking, e.g. a 1D bar code with the black bars containing a smaller sized coding
Applicants Shenzhen Syscan Technology Co., Ltd.
武汉矽感科技有限公司
Inventors Chang Zhiguo
常治国
Wang Peng
王鹏
Lu Yingfeng
吕迎丰
Zhang Fu
张斧
Ding Xiaoyun
丁晓云
Agents jiang yaochun
深圳创友专利商标代理有限公司
Title
(EN) A two dimensional bar codes and coding-decoding method thereof
(ZH) 一种二维条码编解码方法
Abstract
(EN)
This invention relates to two-dimensional bar and code graph to generate the data into two-dimensional bars and to restore the code graph into data. The said code graph is formed by rectangle unit module in plane without gap with different optical characteristics and the unit module is divided into black and white frame modules. The coding method comprises the following steps: dividing two-bit data flow, error-correcting computation, generating cluster module and code graph. The decoding method comprises the following steps: comparing the code pairs, testing outline, getting the four angle coordinates of the macro module, reading bit value, judging code word matrix direction, determining center code words.

(ZH)

本发明克服现有二维条码的特征模式区域与格式信息比较集中、易于被破坏、抗变形能力差的缺点,提出一种二维条码以及将数据编码生成该二维条码的码图和从该码图解码还原数据的方法。这种条码具有矩形码图,所述码图由不同光学特征的矩形单元模块在平面上无间隙排列而成;单元模块分割成存储固定数据长度的数据码词的矩形的、在码图中交替排列的黑边框宏模块和白边框宏模块。宏模块中还存放代表该宏模块在所述码图中的位置的簇号信息。编码方法的步骤包括分割二进制数据流、进行纠错运算、生成簇号模块和码图。解码方法包括对码图照相并二值化、检测边界、求得宏模块的四角坐标、读取比特值、判断码词矩阵的方向、确定中心码词等。