[특허]Decoding of barcodes by preprocessing scan data

[미국특허] Decoding of barcodes by preprocessing scan data 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-007/10
출원번호	US-0208736 (1988-06-17)
발명자 / 주소	Mertel Michael E. (Renton WA) Thomas James E. (Seattle WA)
출원인 / 주소	Microscan Systems Incorporated (Tukwila WA 02)
인용정보	피인용 횟수 : 41 인용 특허 : 10

초록 ▼

Scanned barcodes represented by an electrical signal are preprocessed in a PLA and delivered to a microprocessor in a form that permits efficient final processing of the data. High speed edge detection produce edge markers for the control logic and counting circuits coupled with a Johnson state counter to logically sequence the processor. Logarithmic conversion compresses the counted time interval to a single data word that can most efficiently be processed by the host microprocessor. Logic between the preprocessor and the microprocessor transfer digital representations of each bar and space to preassigned respective areas in the microprocessor memory. Bar/space margin detection performs a ratiometric comparison of each bar and space to determine every occurrence of 10:1 ratios and both bar/space and space/bar. Pointer signal information is transferred to the microprocessor indicating precisely where in memory each 10:1 margin ratio is located. A digital filter excludes spurious bar/space width in the preprocessor.

대표청구항 ▼

In a system for decoding data scanned at a relatively high rate from barcode symbols, the combination comprising: a preprocessor for receiving and preprocessing a scanned space and bar signal information, and a microprocessor cooperating with said preprocessor for completing decoding of said signal information and having a word length n; said preprocessor comprising: edge detect logic means for detecting the occurrence of edges of said space and bar signal information; primary counter logic means for receiving clock pulses of a predetermined frequency and performing a binary count up to a predetermined maximum count of C where C=2n′, and n′=the number of binary bits of said primary counter logic means; sequencing logic means connected to said edge detect logic means and to said primary counter logic means for causing said primary counter logic means to perform a binary count of said clock pulses to represent the widths of spaces and bars in said space and bar signal information; log conversion logic means for converting said binary counts of spaces and bars to log counts L represented by integers in a range from 0 to a maximum of 2n; ratio logic means for detecting quiet zone margins from consecutive log counts L developed by said log conversion logic means, and producing a margin flag signal in response to log counts L having ratios equal to or greater than a predetermined ratio of space to bar widths; and latch logic means for latching and transferring log counts L to said microprocessor; and wherein said microprocessor has RAM means for storing said log counts L of space and bar widths at predetermined address areas, and for storing margin location data in the form of addresses of said log counts L that point to the memory locations of those space and bar counts at or adjacent to said predetermined quiet zone margins.

이 특허에 인용된 특허 (10) 인용/피인용 타임라인 분석

Jordan ; Jr. Alex (Raleigh NC), Bar code candidate select circuit.
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Dittakavi Ashok (Lubbock TX), Bar code information source and method for decoding same.
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Serge Richard F. (Lewisville NC), Bar code reader system.
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Smith Robert E. (Tucson AZ), Bar code reading system and method.
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Priese Werner K. (Barrington IL) Hayes Wayne David (Mt. Prospect IL), High pressure diaphragm valve.
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McJohnson Robert B. (Dallas TX), Logarithmically normalized cross-correlation bar-code reader.
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Hester Gerald P. (Santa Ana CA) Sherer Paul (Costa Mesa CA), Method and apparatus for reading and decoding a high density linear bar code.
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Nakanishi Sadao (Ise JPX) Suzuki Kazuhiro (Ise JPX) Tokura Nobufumi (Ise JPX) Endo Shinichiro (Ise JPX), Method for enhancing the reliability of output data from a label reader.
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Neseem Syed (Cambridge OH) Blanford Denis M. (Cambridge OH) Amacher Gene L. (Cambridge OH), Slot scanning system.
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Wescott ; Robert D. ; Christie ; John B., Symbol decoding method and means.
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이 특허를 인용한 특허 (41) 인용/피인용 타임라인 분석

Zhu, Xiaoxun; Au, Ka Man; Germaine, Gennady; Good, Timothy A.; Schnee, Michael; Scott, Ian; Groot, John; Wilz, Sr., David M.; Rockstein, George B.; Blake, Robert E.; Dickson, LeRoy; Knowles, Carl Har, AUTOMATED METHOD OF AND SYSTEM FOR DIMENSIONING OBJECTS TRANSPORTED THROUGH A WORK ENVIRONMENT USING CONTOUR TRACING, VERTICE DETECTION, CORNER POINT DETECTION, AND CORNER POINT REDUCTION METHODS ON .
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Zhu,Xiaoxun; Au,Ka Man; Germaine,Gennady; Good,Timothy A.; Schnee,Michael; Scott,Ian; Groot,John; Wilz, Sr.,David M.; Rockstein,George B.; Blake,Robert E.; Dickson,LeRoy; Knowles,Carl Harry, Automated method of and system for dimensioning objects over a conveyor belt structure by applying contouring tracing, vertice detection, corner point detection, and corner point reduction methods to two-dimensional range data maps of the space above the conveyor belt captured by an amplitude modulated laser scanning beam.
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Ackley, Sprague; Hunt, Jeffrey M., Automatic data collection device, method and article.
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Zimmerman, Timothy M.; Ungs, Kelly J., Automatic data collection device, method and article.
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Ouchi, Junichi; Nakase, Koji; Sasaki, Hiroaki, Bar code reading and decoding apparatus.
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Mulla Altaf ; Fama Anthony ; Boehm Thomas ; Brown Daniel ; Sackett William, Bar code scanning system with the pre-decoding signal processing and method for bar code candidate selection for decodin.
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Rockstein George B. ; Wilz ; Sr. David M. ; Bubnoski David P. ; Knowles Carl H., Bar code symbol reading system having automatic hand-supportable bar code symbol reading device and stand for supporting.
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Rockstein George B. ; Wilz ; Sr. David M. ; Bubnoski David P. ; Knowles Carl H., Bar code symbol reading system having automatic hand-supportable bar coding symbol reading device and stand for supporti.
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Petteruti Steven F. ; Amani Majid ; Violette Raymond P., Computer system for a printer which stores and operates multiple application programs.
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Steven F. Petteruti ; Majid Amani ; Raymond P. Violette, Computer system for a printer which stores and operates multiple application programs.
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Rockstein George B. ; Wilz ; Sr. David M. ; Bubnoski David P. ; Knowles Carl H., Countertop bar code symbol reading system having automatic hand supportable bar code symbol reading device and stand for.
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Rockstein George B. (Audubon NJ) Wilz ; Sr. David M. (Sewell NJ) Bubnoski David P. (Glassboro NJ) Knowles Carl H. (Moorestown NJ), Countertop bar code symbol reading system having automatic hand-supportable bar code symbol reading device and stand for.
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Taussig Andrew P. (Eugene OR) Isaacs Blake L. (Springfield OR), Data gathering system interface.
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Gao, WenLiang; Shearin, Alan, Distributed camera modules serially coupled to common preprocessing resources facilitating configurable optical code reader platform for application-specific scalability.
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Wiklof Christopher A. ; Ackley H. Sprague, Error correction enhancement for code 93i and other machine-readable symbologies.
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Chan Jane ; Goren David ; Kuchenbrod Harry ; Serbin Gary ; Shellhammer Stephen ; Spitz Glenn, Interface between threshold processing digitizer for bar code reader.
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Ogami Kenneth Yuji, Method and apparatus for decoding symbols by declaring erasures of element characteristics.
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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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Ogami Kenneth Yuji, Method and apparatus of autodiscriminating in symbol reader employing prioritized and updated table of symbologies.
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Callum,Roy, Method and apparatus to verify circuit operating conditions.
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Boersma Gerrit,NLX ; Maat Dennis Johannes,NLX, Method and device for decoding bar codes.
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Itoh Motohiko,JPX ; Satoh Shinichi,JPX ; Watanabe Mitsuo,JPX ; Kawai Hiroaki,JPX ; Iwaguchi Isao,JPX, Method of reading bar code.
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Itoh Motohiko,JPX ; Satoh Shinichi,JPX ; Watanabe Mitsuo,JPX ; Kawai Hiroaki,JPX ; Iwaguchi Isao,JPX, Method of reading bar code.
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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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Gotoh,Yoshiho; Oshima,Mitsuaki; Tanaka,Shinichi; Koishi,Kenji; Moriya,Mitsuro, Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manu.
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Bridgelall Raj ; Barkan Edward ; Shellhammer Stephen ; Campanelli Joseph ; Katz Joseph ; Li Yajun ; McGlynn Daniel R., Optical scanners.
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Bridgelall Raj ; Barkan Edward ; Shellhammer Stephen ; Campanelli Joseph ; Katz Joseph ; Li Yajun ; McGlynn Daniel R., Optical scanners.
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Hennenhoefer Eric Todd ; Raymond Jonathan Henry, Optimized multiplexer structure for emulation systems.
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Keinath Armin,DEX ; Worner Jorg,DEX, Optoelectronic a device employing a digital filter which operates in different coefficient sets.
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Massieu,Jean Louis; Ackley,H. Sprague, Optoelectronic device, process and article for acquiring machine-readable symbols, such as bar codes.
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Postman Joel R. ; Miller George B. ; Fish Ronald C., PCMCIA interface card for coupling input devices such as barcode scanning engines to personal digital assistants and palmtop computers.
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Postman, Joel R.; Miller, George B.; Fish, Ronald C., PCMCIA interface card for coupling input devices such as barcode scanning engines to personal digital assistants and palmtop computers.
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Postman, Joel R.; Miller, George B.; Fish, Ronald C., PCMCIA interface card for coupling input devices such as barcode scanning engines to personal digital assistants and palmtop computers.
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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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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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Albertelli,Lawrence E.; Ii,David L.; Kung,Nina, System and method for filtering and binarization of images in the presence of specular noise.
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Lorton Christopher W. ; Griner James C. ; Jones ; III Creed F. ; Williams Richard P. ; Rystrom Larry ; Orrell ; III James D., System for reading data glyphs.
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Lorton Christopher W. ; Griner James C. ; Jones ; III Creed F. ; Williams Richard P. ; Rystrom Larry ; Orrell ; III James D., System for reading data glyphs.
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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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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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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Decoding of barcodes by preprocessing scan data 원문보기