JPS5873280A - 信号２値化処理装置 - Google Patents

信号２値化処理装置

Info

Publication number
JPS5873280A
JPS5873280A JP56170773A JP17077381A JPS5873280A JP S5873280 A JPS5873280 A JP S5873280A JP 56170773 A JP56170773 A JP 56170773A JP 17077381 A JP17077381 A JP 17077381A JP S5873280 A JPS5873280 A JP S5873280A
Authority
JP
Japan
Prior art keywords
signal
voltage
analog video
video signal
comparison
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.)
Granted
Application number
JP56170773A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6156673B2 (en]
Inventor
Mitsuharu Tadauchi
允晴 多々内
Kunio Sato
国雄 佐藤
Kiyohiko Tanno
丹野　清彦
Koji Suehiro
末広　紘司
Yasuo Inoue
井上　保男
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56170773A priority Critical patent/JPS5873280A/ja
Priority to US06/435,549 priority patent/US4571573A/en
Publication of JPS5873280A publication Critical patent/JPS5873280A/ja
Publication of JPS6156673B2 publication Critical patent/JPS6156673B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Input (AREA)
  • Manipulation Of Pulses (AREA)
JP56170773A 1981-10-27 1981-10-27 信号２値化処理装置 Granted JPS5873280A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56170773A JPS5873280A (ja) 1981-10-27 1981-10-27 信号２値化処理装置
US06/435,549 US4571573A (en) 1981-10-27 1982-10-21 Apparatus for converting an analog signal to a binary signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56170773A JPS5873280A (ja) 1981-10-27 1981-10-27 信号２値化処理装置

Publications (2)

Publication Number Publication Date
JPS5873280A true JPS5873280A (ja) 1983-05-02
JPS6156673B2 JPS6156673B2 (en]) 1986-12-03

Family

ID=15911105

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56170773A Granted JPS5873280A (ja) 1981-10-27 1981-10-27 信号２値化処理装置

Country Status (2)

Country Link
US (1) US4571573A (en])
JP (1) JPS5873280A (en])

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153868A (ja) * 1984-08-24 1986-03-17 Dainippon Screen Mfg Co Ltd 画像走査信号処理におけるキャリブレーション装置
US4853795A (en) * 1987-07-24 1989-08-01 Eastman Kodak Company Forward look ahead techniques for tracking background and noise levels in scanned video images
US4982294A (en) * 1987-07-24 1991-01-01 Eastman Kodak Company Apparatus for enhancing and thresholding scanned microfilm images and methods for use therein
US5027117A (en) * 1988-03-31 1991-06-25 Ricoh Company, Ltd. Conversion using a variable reference based on image density
FR2639559B1 (fr) * 1988-11-29 1991-01-11 Bull Sa Appareil pour separer et recuperer des particules solides de revelateur transportees par un flux gazeux
US5287227A (en) * 1989-11-08 1994-02-15 Seagate Technology, Inc. Track dependent variable level qualification pulse detector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654121A (en) * 1979-10-09 1981-05-14 Matsushita Electric Ind Co Ltd Binarizing device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3599151A (en) * 1969-12-29 1971-08-10 Ibm Character recognition photosensing apparatus having a threshold comparator circuit
GB1430724A (en) * 1974-07-30 1976-04-07 Toyo Ink Mfg Co Threshold device for converting a video signal to a binary video signal and a method of determining the threshold level
US4121121A (en) * 1977-09-13 1978-10-17 Computer Identics Corporation Follower response control circuit
US4337455A (en) * 1978-04-21 1982-06-29 Caere Corporation Apparatus for processing video signals received from an optical scanner
FR2425780A1 (fr) * 1978-05-12 1979-12-07 Cit Alcatel Convertisseur auto-adaptatif en tout ou rien d'un signal d'analyse d'image
US4217553A (en) * 1978-06-05 1980-08-12 Telex Computer Products, Inc. Dynamic slicing compensation for attenuated signals in pulse width modulation
SE448921B (sv) * 1980-10-08 1987-03-23 Ibm Svenska Ab Videosignaldetektor for detektering av inkommande analoga videosignaler fran en optisk dokumentlesare och for avgivande av digitala utgangssignaler
JPS57150277A (en) * 1981-03-13 1982-09-17 Fuji Xerox Co Ltd Image signal processing circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654121A (en) * 1979-10-09 1981-05-14 Matsushita Electric Ind Co Ltd Binarizing device

Also Published As

Publication number Publication date
US4571573A (en) 1986-02-18
JPS6156673B2 (en]) 1986-12-03

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