JPS5790787A - Binary quantizing circuit of picture element signal - Google Patents

Binary quantizing circuit of picture element signal

Info

Publication number
JPS5790787A
JPS5790787A JP55136011A JP13601180A JPS5790787A JP S5790787 A JPS5790787 A JP S5790787A JP 55136011 A JP55136011 A JP 55136011A JP 13601180 A JP13601180 A JP 13601180A JP S5790787 A JPS5790787 A JP S5790787A
Authority
JP
Japan
Prior art keywords
picture element
threshold value
analog
generated
element signal
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
JP55136011A
Other languages
Japanese (ja)
Inventor
Akira Sakurai
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55136011A priority Critical patent/JPS5790787A/en
Publication of JPS5790787A publication Critical patent/JPS5790787A/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)
  • Image Input (AREA)

Abstract

PURPOSE:To reproduce a binary picture of high quality regardless of the level of the texture concentration, by giving the binary quantization to a series of analog signals within an analog shift register with the threshold value of a specific sampling timing. CONSTITUTION:The level is decided by a group of comparators 51-5n for a series of analog picture element signals within an analog shift register 4 while the threshold value is gradually increased with time. The total sum value is obtained for the output signals of the comparator group 5, and the sampling timing is generated within a flat period after a time changing curve lowers down from its peak. At the time point when the timing is generated, the output signal of a comparator corresponding to the noticed picture element signal in the group 5 is fetched into a sample holding circuit 15 to be held temporarily. Then an output is obtained by giving the binary quantization to the noticed picture element signal with the threshold value at the time point when the sampling timing is generated.
JP55136011A 1980-09-30 1980-09-30 Binary quantizing circuit of picture element signal Pending JPS5790787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55136011A JPS5790787A (en) 1980-09-30 1980-09-30 Binary quantizing circuit of picture element signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55136011A JPS5790787A (en) 1980-09-30 1980-09-30 Binary quantizing circuit of picture element signal

Publications (1)

Publication Number Publication Date
JPS5790787A true JPS5790787A (en) 1982-06-05

Family

ID=15165089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55136011A Pending JPS5790787A (en) 1980-09-30 1980-09-30 Binary quantizing circuit of picture element signal

Country Status (1)

Country Link
JP (1) JPS5790787A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634373A (en) * 1986-06-25 1988-01-09 Matsushita Electric Ind Co Ltd Pattern recognizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634373A (en) * 1986-06-25 1988-01-09 Matsushita Electric Ind Co Ltd Pattern recognizer

Similar Documents

Publication Publication Date Title
JPS57111810A (en) Digital signal processor
JPS5790787A (en) Binary quantizing circuit of picture element signal
JPS5752227A (en) Data sampling circuit
JPS64843A (en) C/n measuring circuit
JPS51136461A (en) Consumed power detecting device
JPS5635571A (en) Quantizing circuit
JPS55150667A (en) Picture signal quantizing system
JPS56126392A (en) Picture tracking device
JPS54127668A (en) Analog-digital converter using josephson element
JPS5513588A (en) Sampling circuit
JPS5625825A (en) Analog-digital conversion circuit
JPS5245359A (en) Analog-digital converter
JPS5432255A (en) Analog digital converter
JPS5585168A (en) Shaping circuit for binary signal
JPS6429024A (en) Digital peak detector
JPS5454507A (en) Coding processing system of adaptive expectancy
JPS5489546A (en) Signal processing system
JPS5720078A (en) Detector for synchronizing signal
JPS5481014A (en) Processing methid of video signal
JPS645248A (en) C/n measuring circuit
JPS5797222A (en) Nonlinear analog-to-digital converter
JPS55166377A (en) Reading device for double-color original
JPS5694831A (en) Analog-digital converter
JPS5790750A (en) Signal input device
JPS5533204A (en) Digital control system