[특허]Method and apparatus for reading and decoding a high density linear bar code

[미국특허] Method and apparatus for reading and decoding a high density linear bar code 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-007/10
출원번호	US-0142776 (1980-04-22)
발명자 / 주소	Hester Gerald P. (Santa Ana CA) Sherer Paul (Costa Mesa CA)
출원인 / 주소	MSI Data Corporation (Costa Mesa CA 02)
인용정보	피인용 횟수 : 42 인용 특허 : 0

초록 ▼

A method and apparatus for decoding a high density linear bar code of the type of the Universal Product Code (UPC) symbol and derivatives thereof. The method comprehends unambiguously decoding the encoded characters of the symbol by the use of primary ratios representative of the ratios of the sum of the widths of selected coding modules and secondary decoding ratios. The secondary ratios are selected in the event of any out-of-tolerance printing of the symbol for permitting the secondary ratios to be utilized with the primary ratios for resolving any possible ambiguities. The method and apparatus is applicable to scanning the UPC symbol by means of a hand-held wand as well as laser beam scanning. The apparatus contemplates the measuring of the widths of the coding modules and storing the width measurements in a memory without decoding. Since the symbol includes a standard pattern having known module-to-module width ratios, this information is utilized for processing the stored data to locate the measurement data in the memory, compute the printing tolerance character and then compute the desired ratios for decoding the scanned symbol.

대표청구항 ▼

A method of reading a delta distance coded segment having coding modules of the type of the Universal Product Code including the steps of unambiguously decoding the information containing coding modules of the coded segment on the basis of measuring the relative widths of preselected coding modules exhibiting delta distance properties to obtain two primary ratios of the selected delta distances to thereby decode the segments, and in the event a coded segment may not be unambiguously decoded by the first step, examining the ambiguously decoded segment for producing the ratio of the widths of a pair of preselected coding modules thereof that do not exhibit delta distance properties to define secondary ratios for unambiguously decoding the coded segment by the use of the two primary decoding ratios and one of the secondary ratios, the pair of preselected coding modules utilized in the second decoding step for defining a secondary ratio being selected from the coding modules utilized for the first decoding step in defining one of the primary ratios on the basis of the width relationships of a preselected one of the two primary ratios resulting from the first decoding step.

이 특허를 인용한 특허 (42) 인용/피인용 타임라인 분석

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Laser Vadim (994 Twincrest Ct. Cincinnati OH 45231), Method and apparatus for remotely reading and decoding bar codes.
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Ogami Kenneth Yuji, Method and apparatus of autodiscriminating in symbol reader employing prioritized and updated table of symbologies.
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Cherry Craig D. (Eugene OR), Method and system for control of a bar code scanner threshold.
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Cherry Craig D. (Eugene OR) Taussig Andrew P. (Eugene OR) Brooks Michael T. (Veneta OR), Method of decoding a binary scan signal.
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Goren David ; Barkan Edward ; Bridgelall Raj, Method of scanning indicia using selective sampling.
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Goren, David; Barkan, Edward; Bridgelall, Raj, Method of scanning indicia using selective sampling.
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Maltseff, Paul A.; Winter, Steven; Nikitin, Pavel; Kodukula, Venkata; Erosheva, Elena, Stochastic communication protocol method and system for radio frequency identification (RFID) tags based on coalition formation, such as for tag-to-tag communication.
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Laurer George J. (Wendell NC) Stokes ; Jr. Olen L. (Cary NC), Systematic error correction in bar code scanner.
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Marty, William A.; Dean, Daniel; Ackley, H. Sprague, Systems, devices, and methods for reading machine-readable characters and human-readable characters.
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A	생활필수품
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method and apparatus for reading and decoding a high density linear bar code 원문보기