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1. JP2005267598 - TWO-DIMENSIONAL BAR CODE AND SIGN DECODING METHOD

Office Japan
Application Number 2004277645
Application Date 24.09.2004
Publication Number 2005267598
Publication Date 29.09.2005
Grant Number 4564813
Grant Date 06.08.2010
Publication Kind B2
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
G06K 7/10
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7Methods or arrangements for sensing record carriers
10by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
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
シンセン・シスカン・テクノロジー・カンパニー・リミテッド
Inventors JOU JIKOKU
ジョウ・ジコク
WAN PON
ワン・ポン
RYU EIHOU
リュ・エイホウ
CHOU FUU
チョウ・フー
DEINN SHOOUN
ディンー・ショーウン
Agents 山崎 行造
杉山 直人
白銀 博
星 貴子
赤松 利昭
重森 一輝
Title
(EN) TWO-DIMENSIONAL BAR CODE AND SIGN DECODING METHOD
(JA) 二次元バーコード及びその符号複号化方法
Abstract
(EN)

PROBLEM TO BE SOLVED: To improve a defect that a characteristic mode area of present two-dimensional bar code and format information relatively concentrate and easy to be broken and deformation-resistant ability is low.

SOLUTION: The two-dimensional bar code has a rectangular code pattern formed by arranging rectangular unit modules having a different optical characteristic in a plane without interval, and the unit module is divided into black framed macro modules and white framed macro modules arranged each other in the rectangular code pattern storing a data code word of a fixed data length. The macro module houses cluster number information showing position. As a coding method, a binary data stream is divided, and computing is performed to correct wrong to generate a cluster number module and a code pattern. As a decoding method, the code pattern is picked up for binarization, and a boundary is detected to obtain coordinates of four corners of the macro module, and the number of hit is read out to determine direction and to decide a central code word.

COPYRIGHT: (C)2005,JPO&NCIPI

(JA)

【課題】現有の二次元バーコードの特徴モード領域とフォーマット情報が比較的集中しており、破壊されやすく、耐変形能力が悪いという欠点を改善する。
【解決手段】二次元バーコードは、光学特性の異なる矩形の単元モジュールが平面で無間隔的に配列された矩形のコードパターンを有し、単元モジュールは、固定データ長のデータコードワードを記憶した矩形のコードパターンにおいて、交互に配列された黒枠マクロモジュールと白枠マクロモジュールとに分割されている。このマクロモジュールには、位置を示すクラスター番号情報を格納している。符号化方法として、バイナリデータストリームを分割し、誤り訂正演算を行い、クラスター番号モジュールとコードパターンを生成する。復号化方法として、コードパターンを撮影して2値化し、境界を検出し、マクロモジュールの四角の座標を求め、ビット数を読み出し、方向を判断し中央コードワードを決定する。
【選択図】 図3