JPS56102161A - Binary encoding circuit - Google Patents

Binary encoding circuit

Info

Publication number
JPS56102161A
JPS56102161A JP438080A JP438080A JPS56102161A JP S56102161 A JPS56102161 A JP S56102161A JP 438080 A JP438080 A JP 438080A JP 438080 A JP438080 A JP 438080A JP S56102161 A JPS56102161 A JP S56102161A
Authority
JP
Japan
Prior art keywords
delayed
picture
picture elements
signal
variance
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
JP438080A
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 JP438080A priority Critical patent/JPS56102161A/en
Publication of JPS56102161A publication Critical patent/JPS56102161A/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 make binary encoding possible with high precision and stabilization by using a digital circuit and deciding a suitable threshold while referring pheripheral picture elements. CONSTITUTION:After an input analog picture signal has been converted into a digital picture signal by A/D converter 10, the converted signal is delayed by 1 line with delay element 11a for 1 line delay and successively delayed 2 lines with delay element 11b. These delayed signals are written together with the nondelayed signal in memories 12a-12c which correspond to 2 picture elements respectively. The output of element 11a is written in memory 15 for N picture elements. Average movement and variance are calculated from the concentration values written newly in memories corresponding to respective lines and the results read out after being delayed by 2N picture elements by means of mean value circuit 13 and variance circuit 14 respectively. The concentration value of the picture element to be observed is obtained as the data read out from memory 15 and the data, mean value and variance value are entered comparator 16 to fine binary coded value.
JP438080A 1980-01-18 1980-01-18 Binary encoding circuit Pending JPS56102161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP438080A JPS56102161A (en) 1980-01-18 1980-01-18 Binary encoding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP438080A JPS56102161A (en) 1980-01-18 1980-01-18 Binary encoding circuit

Publications (1)

Publication Number Publication Date
JPS56102161A true JPS56102161A (en) 1981-08-15

Family

ID=11582744

Family Applications (1)

Application Number Title Priority Date Filing Date
JP438080A Pending JPS56102161A (en) 1980-01-18 1980-01-18 Binary encoding circuit

Country Status (1)

Country Link
JP (1) JPS56102161A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202666A (en) * 1982-05-21 1983-11-25 Ricoh Co Ltd Binary coding system
JPS6168566U (en) * 1984-10-12 1986-05-10
EP0220069A2 (en) 1985-10-18 1987-04-29 Matsushita Graphic Communication Systems, Inc. Past record correcting/reading apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58202666A (en) * 1982-05-21 1983-11-25 Ricoh Co Ltd Binary coding system
JPS6168566U (en) * 1984-10-12 1986-05-10
EP0220069A2 (en) 1985-10-18 1987-04-29 Matsushita Graphic Communication Systems, Inc. Past record correcting/reading apparatus

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