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특허 상세정보

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내보내기 페이스북 공유 카카오톡 공유

Method and apparatus for enhancing resolution of reflectance signals produced from machine-readable symbols

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G06K-007/10   
미국특허분류(USC) 235/462 ; 235/454
출원번호 US-0730474 (1996-10-11)
발명자 / 주소
  • Maltsev Pavel A.
  • Ackley H. Sprague
출원인 / 주소
  • Intermec IP Corp.
대리인 / 주소
    Seed and Berry LLP
인용정보 피인용 횟수 : 36  인용 특허 : 10
초록
▼

A method and apparatus scans or images a machine-readable symbol to produce several reflectance profiles therefrom. The profiles are averaged to produce an averaged profile. Weighted coefficients for each profile are then computed based on the averaged profile. Using the weighted coefficients, a weighted profile from each of the profiles is then produced. Low pass filtering is applied to the weighted profile to filter noisy or gray level signals therefrom. The resulting filtered profile is transformed using a non-linear technique to enhance high amplitud...

대표
청구항
▼

[ We claim:] [1.] A method of decoding a machine-readable symbol representing encoded information, the symbol including a plurality of selectively spaced bars, the bars and spaces between the bars having at least a narrow and a wide width in at least one dimension, the method comprising the steps of:producing a plurality of reflectance signals based on light reflected from the symbol, the plurality of reflectance signals having valleys and peaks that represent the reflectance of the bars and spaces having the wide width, but failing to resolve at least s...

인용문헌 (10)

  1. Joseph Eugene B. (East Setauket NY) Pavlidis Theodosios (Setauket NY), Analog waveform decoder using peak locations.
  2. Ackley H. Sprague (Seattle WA), Method and apparatus for decoding unresolved bar code profiles.
  3. Ackley, H. Sprague, Method and apparatus for decoding unresolved bar code profiles using edge finding circuitry.
  4. Ackley H. Sprague (Seattle WA), Method and apparatus for decoding unresolved complex multi-width bar code symbology profiles.
  5. Ackley H. Sprague (Seattle WA), Method and apparatus for decoding unresolved multi-width bar code symbology profiles.
  6. Surka Stefan (Sandy Hook CT), Method and apparatus for processing low resolution images of degraded bar code symbols.
  7. Raphal Moreno (Marseilles FRX), Method for the optical reading of bar codes.
  8. Klueter Ulrich (Munich DEX), Method of and arrangement for reading a bar code on photographic material.
  9. Takagi Haruyuki (Fujisawa JPX) Yonezawa Takeshi (Hiratsuka JPX), Method of reading concavo-convex bar code.
  10. Delpech Gilbert (Colomiers FRX) Moulas Benoit (Launaguet FRX), Process and apparatus for treatment of an analog electric signal for obtaining a parametrable binary signal representati.

이 특허를 인용한 특허 (36)

  1. Takakura,Hiroyuki; Chiba,Hirotaka; Yamaguchi,Nobuyasu; Noda,Tsugio, Bar code recognizing method and decoding apparatus for bar code recognition.
  2. Uhling Thomas F, Detector for use in a printing device having print media with fluorescent marks.
  3. Attia,Olivier; Shrivastava,Prateek; Zastepine,Roman; Outmezguine,Avi, Group average filter algorithm for digital image processing.
  4. Attia,Olivier; Shrivastava,Prateek; Zastepine,Roman; Outmezguine,Avi, Group average filter algorithm for digital image processing.
  5. Schuessler, Frederick, Ink-spread compensated bar code symbology and compensation methods.
  6. Schuessler, Frederick, Ink-spread compensated bar code symbology and compensation methods.
  7. Schuessler, Frederick, Ink-spread compensated bar code symbology and compensation methods.
  8. H. Sprague Ackley, Machine-readable color symbology and method and apparatus for reading same with standard readers such as laser scanners.
  9. Elgee, Steven B.; Ward, Jefferson P., Marking media using notches.
  10. Steven B. Elgee ; Jefferson P. Ward, Marking media using notches.
  11. Nadabar, Sateesha; Gopalakrishnan, Venkat K., Method and apparatus for calibrating a mark verifier.
  12. Ackley H. Sprague, Method and apparatus for decoding unresolved profiles produced from relief formed symbols.
  13. Nunnink, Laurens; Equitz, William H., Method and apparatus for high resolution decoding of encoded symbols.
  14. Nunnink, Laurens; Equitz, William H., Method and apparatus for high resolution decoding of encoded symbols.
  15. Nadabar, Sateesha; Gerst, Carl W, Method and apparatus for industrial identification mark verification.
  16. Nadabar, Sateesha; Gerst, III, Carl W., Method and apparatus for industrial identification mark verification.
  17. Nadabar, Sateesha; Gopalakrishnan, Venkat K.; Gerst, Carl W., Method and apparatus for verifying two dimensional mark quality.
  18. Nadabar, Sateesha; Gopalakrishnan, Venkat K.; Gerst, III, Carl W., Method and apparatus for verifying two dimensional mark quality.
  19. Nadabar, Sateesha; Gopalakrishnan, Venkat; Gerst, Carl W., Method and apparatus for verifying two dimensional mark quality.
  20. Nadabar,Sateesha, Methods and apparatus for reading bar code identifications.
  21. Nadabar,Sateesha G., Methods and apparatus for reading bar code identifications.
  22. Frantz,Didier; Outmezguine,Avi, Mobile device gateway providing access to instant information.
  23. Gerst, III, Carl W.; Testa, Justin, Mobile hand held machine vision method and apparatus using data from multiple images to perform processes.
  24. Frantz, Didier; Kakar, Manik; Muni, Ashish, Mobile payment system using barcode capture.
  25. Thuries, Serge, Noise reduction by image subtraction in an automatic data collection device, such as an image acquisition device.
  26. Anderson,Emory V.; Nemec,Edward; Lapointe,Jerome P.; DeSieno,Duane; Martinez,Ricardo R.; Marzolf,Gail; Pong,Ronald; Jones,Lynn; Hussa,Robert; Senyei,Andrew, Point of care diagnostic systems.
  27. Elgee Steven B. ; Lubawy Carmalyn ; Mortland Bruce E. ; Huston Craig S. ; Zamani-Kord Said ; Davis Dale R, Print media and method of detecting a characteristic of a substrate of print media used in a printing device.
  28. Hasegawa, Jun, Print quality evaluation apparatus and method of print quality evaluation.
  29. Ghai,Rashmi; Frantz,Didier, Section based algorithm for image enhancement.
  30. Attia,Olivier; Shrivastava,Prateek; Zastepine,Roman; Outmezguine,Avi, System and method for decoding and analyzing barcodes using a mobile device.
  31. Attia,Olivier; Shrivastava,Prateek; Zastepine,Roman; Outmezguine,Avi Chai, System and method for decoding and analyzing barcodes using a mobile device.
  32. Schuessler,Frederick, System and method for decoding and encoding compensated optical codes.
  33. Albertelli,Lawrence E.; Ii,David L.; Kung,Nina, System and method for fast binarization of bar codes in the presence of noise.
  34. Muni,Ashish, System and method for on the spot purchasing by scanning barcodes from screens with a mobile device.
  35. Kruppa, Hannes Martin, System and method for recovering image detail from multiple image frames in real-time.
  36. Rohs,Michael, Visual code system for camera-equipped mobile devices and applications thereof.

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