JPS56109069A - Binary circuit - Google Patents

Binary circuit

Info

Publication number
JPS56109069A
JPS56109069A JP1220280A JP1220280A JPS56109069A JP S56109069 A JPS56109069 A JP S56109069A JP 1220280 A JP1220280 A JP 1220280A JP 1220280 A JP1220280 A JP 1220280A JP S56109069 A JPS56109069 A JP S56109069A
Authority
JP
Japan
Prior art keywords
video
binarization
line
share
video element
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
JP1220280A
Other languages
Japanese (ja)
Inventor
Hironori Takashima
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1220280A priority Critical patent/JPS56109069A/en
Publication of JPS56109069A publication Critical patent/JPS56109069A/en
Pending 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
    • 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)

Abstract

PURPOSE:To enable to perform binarization stably with high accuracy in following the video signal level, by the binarization through the use of moving average of the density of noted video element and that of surrounding video element. CONSTITUTION:The digital video signal from an A/D converter 10 is delayed by one line's share with a delay element 11a for one line and delayed by 2-line at a delay element 11b, they are respectively written in the memories 12a-12c for 2N video element's share, and the noted video elements delayed by 1 line are written in the memory 15 for N-video element's share. In an average circuit 13, the density corresponding to each line and that read out after the delay of 2N video element's share call for moving average. The data read out from the memory 15 and this moving average value are compared for binarization. Since the video element before and after the noted video element is reflected on the binarization, the binarization can be made stably on real time with high accuracy.
JP1220280A 1980-02-04 1980-02-04 Binary circuit Pending JPS56109069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1220280A JPS56109069A (en) 1980-02-04 1980-02-04 Binary circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1220280A JPS56109069A (en) 1980-02-04 1980-02-04 Binary circuit

Publications (1)

Publication Number Publication Date
JPS56109069A true JPS56109069A (en) 1981-08-29

Family

ID=11798808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1220280A Pending JPS56109069A (en) 1980-02-04 1980-02-04 Binary circuit

Country Status (1)

Country Link
JP (1) JPS56109069A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175280A (en) * 1983-03-24 1984-10-04 Matsushita Electric Ind Co Ltd Device for binary-coding video signal
JPS6083469A (en) * 1983-10-14 1985-05-11 Ricoh Co Ltd Binary coding device for picture signal
EP0223601A2 (en) 1985-11-18 1987-05-27 Sharp Kabushiki Kaisha Image processing method
JPH01202984A (en) * 1988-02-09 1989-08-15 Sharp Corp Binarizing processor
US5452107A (en) * 1993-03-19 1995-09-19 Ricoh Company, Ltd. Image processing apparatus providing a bilevel image signal by changing binarization threshold value based on densities of original image areas incuding target pixel and less than all surrounding pixels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175280A (en) * 1983-03-24 1984-10-04 Matsushita Electric Ind Co Ltd Device for binary-coding video signal
JPS6083469A (en) * 1983-10-14 1985-05-11 Ricoh Co Ltd Binary coding device for picture signal
JPH0521387B2 (en) * 1983-10-14 1993-03-24 Ricoh Kk
EP0223601A2 (en) 1985-11-18 1987-05-27 Sharp Kabushiki Kaisha Image processing method
US4841374A (en) * 1985-11-18 1989-06-20 Sharp Kabushiki Kaisha Image processing method
JPH01202984A (en) * 1988-02-09 1989-08-15 Sharp Corp Binarizing processor
US5452107A (en) * 1993-03-19 1995-09-19 Ricoh Company, Ltd. Image processing apparatus providing a bilevel image signal by changing binarization threshold value based on densities of original image areas incuding target pixel and less than all surrounding pixels

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