[특허]Method and apparatus for decoding unresolved multi-width bar code symbology profiles

[미국특허] Method and apparatus for decoding unresolved multi-width bar code symbology profiles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-007/10
출원번호	US-0327972 (1994-10-24)
발명자 / 주소	Ackley H. Sprague (Seattle WA)
출원인 / 주소	Intermec Corporation (Everett WA 02)
인용정보	피인용 횟수 : 32 인용 특허 : 0

초록 ▼

A method and apparatus for decoding profiles which fail to resolve narrow elements in multi-width symbols, first begins by identifying which elements in the profile are resolved. Second, the distances between the centers of the resolved elements are determined. Third, closure boundaries are determined, and the widths of resolved elements are determined at the closure boundary. The type of resolved element is determined based on its measured width. Thereafter, a unit distance is determined for 1-wide narrow elements unresolved in the profile. Based on the unit distance and the width of two adjacent resolved elements, a matrix is constructed for determining the number of narrow elements unresolved between two resolved elements. Based on the measured center distances, the resolved element widths and the matrix, all of the unresolved narrow elements are identified in the profile and the profile is subsequently decoded.

대표청구항 ▼

A method of decoding a bar code symbol representing encoded information, the bar code symbol including a plurality of relatively spaced bars having at least first, second and third widths, and spaces between the bars having at least first, second and third widths, the second and third widths being greater than the first width, the method comprising the steps of: receiving light reflected from the bar code symbol and producing an output signal therefrom that represents the reflectance of the bars and spaces comprising the bar code symbol; receiving the output signal and producing a wide feature signal resolving the bars and spaces having the second and third widths, but the wide feature signal failing to resolve at least some of the bars and spaces having the first width; receiving the wide feature signal and determining which of the bars and spaces are resolved by defining a threshold and identifying a plurality of portions in the wide feature signal that extend beyond the threshold, each of the plurality of portions corresponding to one of the resolved bars and spaces; measuring distances between the plurality of portions in the wide feature signal; determining a narrow width of the bars and spaces having the first width based on the distances measured; determining a number and location of the bars and spaces having the first width based on the determined width and the distances measured; and determining the information encoded in the bar code symbol based on the determined number and location of bars and spaces having the first width.

이 특허를 인용한 특허 (32) 인용/피인용 타임라인 분석

Bachelder, Ivan A.; Vaidyanathan, Savithri, Barcode decoding.
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Mase,Joseph C.; Trinidad,Margaret; Edwards,Scott, Coding symbology and a method for printing same.
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Mase,Joseph C.; Trinidad,Margaret; Edwards,Scott, Coding symbology and a method for printing same.
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Bachelder, Ivan; Negro, James A.; Sastry, Shekhar; Steinsaltz, Yael, Decoding barcodes.
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Bachelder, Ivan; Negro, James A.; Sastry, Shekhar; Steinsaltz, Yael, Decoding barcodes.
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Hecht Kurt ; Neskovic Milorad ; Shreesha Vasanth ; Cohen Edward, High speed image acquisition system and method of processing and decoding bar code symbol.
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Hecht Kurt ; Neskovic Milorad ; Shreesha Vasanth ; Cohen Edward, High speed image acquisition system and method of processing and decoding barcode symbol.
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Gallo, Orazio; Manduchi, Roberto, Image-based barcode reader.
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H. Sprague Ackley, Machine-readable color symbology and method and apparatus for reading same with standard readers such as laser scanners.
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Nadabar, Sateesha; Gopalakrishnan, Venkat K., Method and apparatus for calibrating a mark verifier.
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Ackley H. Sprague, Method and apparatus for decoding unresolved profiles produced from relief formed symbols.
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Lemelson Jerome H. ; Hiett John H., Method and apparatus for encoding and decoding bar codes with primary and secondary information and method of using such bar codes.
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Lemelson,Jerome H.; Hiett,John H., Method and apparatus for encoding and decoding bar codes with primary and secondary information and method of using such bar codes.
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Maltsev Pavel A. ; Ackley H. Sprague, Method and apparatus for enhancing resolution of reflectance signals produced from machine-readable symbols.
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Nunnink, Laurens; Equitz, William H., Method and apparatus for high resolution decoding of encoded symbols.
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Nunnink, Laurens; Equitz, William H., Method and apparatus for high resolution decoding of encoded symbols.
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Nadabar, Sateesha; Gerst, Carl W, Method and apparatus for industrial identification mark verification.
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Nadabar, Sateesha; Gerst, III, Carl W., Method and apparatus for industrial identification mark verification.
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Shimizu Mark Y. ; Liu Lingnan, Method and apparatus for reading machine-readable symbols by employing a combination of multiple operators and/or proces.
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Murphy Robert H. ; MacDonald Neal E. ; Ramsden John D., Method and apparatus for thermal gradient stabilization of microbolometer focal plane arrays.
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Nadabar, Sateesha; Gopalakrishnan, Venkat K.; Gerst, Carl W., Method and apparatus for verifying two dimensional mark quality.
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Nadabar, Sateesha; Gopalakrishnan, Venkat K.; Gerst, III, Carl W., Method and apparatus for verifying two dimensional mark quality.
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Nadabar, Sateesha; Gopalakrishnan, Venkat; Gerst, Carl W., Method and apparatus for verifying two dimensional mark quality.
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Longacre, Jr., Andrew, Method for omnidirectional processing of 2D images including recognizable characters.
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Longacre, Jr., Andrew, Method for omnidirectional processing of 2D images including recognizable characters.
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He Duanfeng ; Joseph Eugene, Method of processing an analog electrical signal containing information representative of reflected light from coded indicia, wherein the electrical signal contains edge transitions.
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Nadabar,Sateesha, Methods and apparatus for reading bar code identifications.
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Nadabar,Sateesha G., Methods and apparatus for reading bar code identifications.
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Gerst, III, Carl W.; Testa, Justin, Mobile hand held machine vision method and apparatus using data from multiple images to perform processes.
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[미국특허] Method and apparatus for decoding unresolved multi-width bar code symbology profiles 원문보기