JPS5534704A - Threshold setting circuit - Google Patents

Threshold setting circuit

Info

Publication number
JPS5534704A
JPS5534704A JP10661378A JP10661378A JPS5534704A JP S5534704 A JPS5534704 A JP S5534704A JP 10661378 A JP10661378 A JP 10661378A JP 10661378 A JP10661378 A JP 10661378A JP S5534704 A JPS5534704 A JP S5534704A
Authority
JP
Japan
Prior art keywords
level
signals
threshold
highest
setting circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10661378A
Other languages
English (en)
Japanese (ja)
Inventor
Hajime Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hajime Industries Ltd
Original Assignee
Hajime Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hajime Industries Ltd filed Critical Hajime Industries Ltd
Priority to JP10661378A priority Critical patent/JPS5534704A/ja
Priority to FR7921641A priority patent/FR2435092B1/fr
Priority to US06/070,908 priority patent/US4259662A/en
Priority to CA334,757A priority patent/CA1131786A/en
Priority to GB7930078A priority patent/GB2031240B/en
Priority to DE19792935312 priority patent/DE2935312A1/de
Publication of JPS5534704A publication Critical patent/JPS5534704A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/01—Shaping pulses
    • H03K5/08—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding
    • H03K5/082—Shaping pulses by limiting; by thresholding; by slicing, i.e. combined limiting and thresholding with an adaptive threshold
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Analysis (AREA)
  • Image Input (AREA)
  • Manipulation Of Pulses (AREA)
  • Image Processing (AREA)
  • Electronic Switches (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP10661378A 1978-08-31 1978-08-31 Threshold setting circuit Pending JPS5534704A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP10661378A JPS5534704A (en) 1978-08-31 1978-08-31 Threshold setting circuit
FR7921641A FR2435092B1 (fr) 1978-08-31 1979-08-29 Circuit d'etablissement de seuil
US06/070,908 US4259662A (en) 1978-08-31 1979-08-29 Threshold setting circuit
CA334,757A CA1131786A (en) 1978-08-31 1979-08-30 Threshold setting circuit
GB7930078A GB2031240B (en) 1978-08-31 1979-08-30 Threshold setting circuit
DE19792935312 DE2935312A1 (de) 1978-08-31 1979-08-31 Schwellenwertregler fuer geraete zum extrahieren eines bestimmten rasterbildes oder musters aus dem bildinhalt eines videosensors o.dgl.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10661378A JPS5534704A (en) 1978-08-31 1978-08-31 Threshold setting circuit

Publications (1)

Publication Number Publication Date
JPS5534704A true JPS5534704A (en) 1980-03-11

Family

ID=14437962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10661378A Pending JPS5534704A (en) 1978-08-31 1978-08-31 Threshold setting circuit

Country Status (6)

Country Link
US (1) US4259662A (US08124317-20120228-C00018.png)
JP (1) JPS5534704A (US08124317-20120228-C00018.png)
CA (1) CA1131786A (US08124317-20120228-C00018.png)
DE (1) DE2935312A1 (US08124317-20120228-C00018.png)
FR (1) FR2435092B1 (US08124317-20120228-C00018.png)
GB (1) GB2031240B (US08124317-20120228-C00018.png)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189086A (ja) * 1985-02-15 1986-08-22 Fuji Electric Co Ltd 画像の明暗分布表示装置
JPS63291175A (ja) * 1987-05-23 1988-11-29 Toyota Motor Corp 画像２値化処理装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442544A (en) * 1981-07-09 1984-04-10 Xerox Corporation Adaptive thresholder
US4500202A (en) * 1982-05-24 1985-02-19 Itek Corporation Printed circuit board defect detection of detecting maximum line width violations
US4578810A (en) * 1983-08-08 1986-03-25 Itek Corporation System for printed circuit board defect detection
FR2622992B1 (fr) * 1987-11-06 1990-02-09 Thomson Semiconducteurs Procede de lecture de codes a barres
DE59410398D1 (de) * 1993-09-20 2005-01-13 Thomson Brandt Gmbh Schaltung zur Steuerung mit mehreren Sensoren
US6074790A (en) * 1994-11-17 2000-06-13 Texas Instruments Incorporated Black and white defect correction for a digital micromirror printer
US20070081239A1 (en) * 2005-10-06 2007-04-12 May Gregory J Optical characteristics of a screen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225213A (en) * 1962-05-18 1965-12-21 Beckman Instruments Inc Transition detector
DE1247051B (de) * 1965-06-18 1967-08-10 Siemens Ag Schaltungsanordnung zum Ausgleich von Kontrastaenderungen bei der Digitalisierung von Video-Signalen
DE1549910A1 (de) * 1967-05-10 1971-05-27 Telefunken Patent Einrichtung zur maschinellen Erkennung von Zeichen
US3675201A (en) * 1970-02-24 1972-07-04 Burroughs Corp Threshold voltage determination system
US3668634A (en) * 1970-05-06 1972-06-06 Burroughs Corp Dynamic threshold voltage determination system
GB1383740A (en) * 1971-02-25 1974-02-12 Image Analysing Computers Ltd Detection devices for image analysis systems
US3701099A (en) * 1971-06-08 1972-10-24 Ibm Dynamic discrimination reference level generator for a parallel channel optical document scanner
US3820068A (en) * 1972-06-29 1974-06-25 Westinghouse Learning Corp Background reference level system and method for document scanners
SE387445B (sv) * 1974-12-23 1976-09-06 Asea Ab Anordning vid signaldetektering
US4034342A (en) * 1974-12-23 1977-07-05 Burroughs Corporation Magnetic character recognition system employing a dynamic threshold voltage determination system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189086A (ja) * 1985-02-15 1986-08-22 Fuji Electric Co Ltd 画像の明暗分布表示装置
JPS63291175A (ja) * 1987-05-23 1988-11-29 Toyota Motor Corp 画像２値化処理装置

Also Published As

Publication number Publication date
GB2031240B (en) 1983-03-30
GB2031240A (en) 1980-04-16
FR2435092B1 (fr) 1987-12-24
FR2435092A1 (fr) 1980-03-28
CA1131786A (en) 1982-09-14
US4259662A (en) 1981-03-31
DE2935312A1 (de) 1980-03-13
DE2935312C2 (US08124317-20120228-C00018.png) 1988-08-25

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