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System for digitizing a scanned signal indicating changes in signal intensity 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06K-007/10
출원번호 US-0257668 (1994-06-08)
발명자 / 주소
  • Barkan Edward (Miller Place NY)
출원인 / 주소
  • Symbol Technologies, Inc. (Bohemia NY 02)
인용정보 피인용 횟수 : 38  인용 특허 : 0

초록

A system for digitizing an analog electric signal generated from a photoelectronic conversion of reflected light when scanning indicia having specifically-separated, light-reflective portions. The system detects zero-crossings of the second derivative signal, and ignores noise signals from a first d

대표청구항

A circuit for digitizing an analog electric signal generated from a photoelectronic conversion of reflected light when scanning indicia having spatially-separated, light-reflective portions, comprising: differentiator circuit means for generating a second derivative signal representing a second deri

이 특허를 인용한 특허 (38)

  1. Boyd Raymond J., Bar code digitizer including a voltage comparator.
  2. Olmstead Bryan, Bar code reader with multi-focus lens.
  3. Li Yajun ; Katz Joseph, Bar code scanner having a focusing system.
  4. Gibson, Gregory T., Bar code scanner having an adaptive threshold using a first derivative amplitude.
  5. Kimura, Kazuto; Tanaka, You, Decoding method and decoding processing device.
  6. Canini, Federico; Piva, Marco; Zocca, Rinaldo, Device and method for the acquisition and automatic processing of data obtained from optical codes.
  7. Canini, Federico; Piva, Marco; Zocca, Rinaldo, Device and method for the acquisition and automatic processing of data obtained from optical codes.
  8. Canini, Frederico; Piva, Marco; Zocca, Rinaldo, Device and method for the acquisition and automatic processing of data obtained from optical codes.
  9. Colley James E. ; O'Donnell Patrick M., Electronic edge detection system using a second derivative signal processor.
  10. Brown, Dean R.; Davis, Wyatt O.; Tauscher, Jason B., MEMS device having a drive coil with curved segments.
  11. Barkan,Edward, MEMS-based electro-optical reader and method with extended working range.
  12. Arends Thomas C. ; Elliott Randy D., Method and apparatus for detecting transitions in an input signal.
  13. Thomas C. Arends ; Randy D. Elliott, Method and apparatus for detecting transitions in an input signal.
  14. Arends Thomas C. ; Elliott Randy D., Method and apparatus for determining transitions between relatively high and low levels in an input signal.
  15. Olmstead Bryan L. ; Ahten Michael J. ; Paris Bruce E. ; Acosta Jorge L. ; Ring James W. ; Huss Paul R. ; Williams Jon P.C. ; McQueen Alexander M. ; Person Randy L., Method and apparatus for reading images without need for self-generated illumination source.
  16. Rakers, Patrick L.; Collins, Timothy James; Rachwalski, Richard Stanley; Bushman, Michael L., Method of communication in a radio frequency identification system.
  17. Zocca Rinaldo,ITX ; Bottazzi Marco,ITX ; Caselli Francesco,ITX ; Saporetti Claudio,ITX, Method of compensating the edge positions of a signal generated by scanning a bar code.
  18. Hong Tang ; Donald Alexander Collins, Jr. ; Kenneth Joseph Fabian ; Barry Myron Merganthaler, Methods and apparatus for digitizing and processing of analog barcode signals.
  19. Tang, Hong, Methods and apparatus for dual thresholding in processing of barcode signals.
  20. Gu, Yeming, Methods and apparatus for obtaining imaging information in bar code scanners.
  21. Olmstead Bryan L. ; Ahten Michael J. ; Paris Bruce E. ; Acosta Jorge L. ; Ring James W. ; Huss Paul R. ; Williams Jon P. C. ; McQueen Alexander M. ; Person Randy L., Multi-focus optical reader with masked or apodized lens.
  22. Brown, Dean R.; Davis, Wyatt O.; Gibson, Gregory T.; James, Richard A., Non-resonant drive for adaptive trajectory of a scanner system having a MEMS device.
  23. Boersma Gerrit,NLX, Optical device for reading and decoding bars of different reflectivity arranged in accordance with a barcode and adjoining one another.
  24. Chin, Yee Loong; Cheong, Jiin Cheang, Optical encoder with contamination detection.
  25. Kumagai, Toshimitsu; Ishii, Mitsuhara; Takashima, Yuichirou; Katoh, Hiroaki; Aoki, Toshitaka, Optical reader applicable to plurality of uses.
  26. Kumagai, Toshimitsu; Ishii, Mitsuharu; Takashima, Yuichirou; Katoh, Hiroaki; Aoki, Toshitaka, Optical reader applicable to plurality of uses.
  27. Kumagai,Toshimitsu; Ishii,Mitsuharu; Takashima,Yuichirou; Katoh,Hiroaki; Aoki,Toshitaka, Optical reader applicable to plurality of uses.
  28. Kumagai,Toshimitsu; Ishii,Mitsuharu; Takashima,Yuichirou; Katoh,Hiroaki; Aoki,Toshitaka, Optical reader applicable to plurality of uses.
  29. Kunihiko Itou JP, Optical reader with reduced-sized optical sensor configuration.
  30. Joseph Eugene (Port Jefferson Station NY), Reading indicia by analysis of different light reflecting portions based on signal-to-noise ratios.
  31. Collet, Roeland; James, Richard A.; Brown, Dean R.; Davis, Wyatt O., Scanning module for a scanner system having a MEMS device or the like.
  32. Arends Thomas C. ; Elliott Randy D., Signal conditioning for variable focus optical reader.
  33. Metlitsky Boris ; Dvorkis Paul ; Barkan Edward, Single integrated circuit chip with on-board motor drive, laser drive and digitizer.
  34. Kumagai, Toshimitsu; Ishii, Mitsuharu; Takashima, Yuichirou; Katoh, Hiroaki; Aoki, Toshitaka, Stand for pivotably mounting an optical reading device.
  35. Brown, Dean R.; Davis, Wyatt O.; Tauscher, Jason B.; Bowman, David R., Suspension for maintaining mirror flatness of a MEMS device in a scanner system or the like.
  36. Gibson, Gregory T.; James, Richard A.; Davis, Wyatt O., System for determining an operational state of a MEMS based display.
  37. Gibson, Gregory T.; James, Richard A.; Davis, Wyatt O., System for determining an operational state of a MEMS based laser scanner.
  38. Poloniewicz,Paul; Patel,Mehul; Kumar,Sundeep; Cai,Joseph; He,Duanfeng, Zero-footprint camera-based point-of-sale bar code presentation scanning system.
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