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

Method and apparatus for decoding unresolved complex multi-width bar code symbology profiles 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-007/10
출원번호	US-0386745 (1995-02-10)
발명자 / 주소	Ackley H. Sprague (Seattle WA)
출원인 / 주소	Intermec Corporation (Everett WA 02)
인용정보	피인용 횟수 : 76 인용 특허 : 0

초록 ▼

A method and apparatus for decoding profiles which fail to resolve narrow elements in complex multi-width symbols, first begins by identifying which elements in the profile are resolved. Second, the environments surrounding each resolved element are examined. Third, several closure boundaries are determined, and the widths of resolved elements are determined at a selected threshold. The size of each resolved element is determined based on its measured width at a threshold selected based on the environment surrounding the resolved element. Fourth, the distances between the centers of the resolved elements are determined. Thereafter, an X-dimension is determined for 1-wide narrow elements unresolved in the profile. Based on the X-dimension and known center distances, 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 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 having unresolved portions that fail 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 first threshold and identifying a plurality of resolved portions in the wide feature signal that extend beyond the first threshold, each of the plurality of resolved portions corresponding to one of the resolved bars and spaces; determining an environment for each of the plurality of resolved portions based on whether a selected resolved portion is between two other of the plurality of resolved portions, between two unresolved portions, or between a resolved and an unresolved portion in the wide feature signal; defining at least a second threshold; measuring a width for each of the plurality of portions at one of the first and second thresholds depending upon the environment of the selected resolved portion; determining a narrow width of the bars and spaces having the first width based on the measured widths; determining a number and location of the bars and spaces having the first width based on the determined narrow width and the measured widths; 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 and the measured width for each of the plurality of portions.

이 특허를 인용한 특허 (76)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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연합인증

Method and apparatus for decoding unresolved complex multi-width bar code symbology profiles 원문보기

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Method and apparatus for decoding unresolved complex multi-width bar code symbology profiles 원문보기

초록 ▼

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연구과제 타임라인

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