JPS56774A - Video processing method - Google Patents

Video processing method

Info

Publication number
JPS56774A
JPS56774A JP7527579A JP7527579A JPS56774A JP S56774 A JPS56774 A JP S56774A JP 7527579 A JP7527579 A JP 7527579A JP 7527579 A JP7527579 A JP 7527579A JP S56774 A JPS56774 A JP S56774A
Authority
JP
Japan
Prior art keywords
level
scanning line
noise
background paper
noise level
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
JP7527579A
Other languages
Japanese (ja)
Inventor
Maruzumi Kurose
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 JP7527579A priority Critical patent/JPS56774A/en
Publication of JPS56774A publication Critical patent/JPS56774A/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 reduce the operating capacity and to enable high speed operation, by calculating the noise level through the use of each vodeo element information at the end of scanning line and each video element information at the beginning end of the next scanning line. CONSTITUTION:The noise level of original background paper is calculated at the adders 7, 9 and the divider 8, by using a plurality of contrast level information corresponding to each video element obtained at each read-in and scanning of the end M and the beginning M' of each scanning line. This noise level is taken as threshold level and fed to the comparator 15 to reject the noise on background paper. Accordingly, since the operating element is less, the processing speed is increased and since the optimum threshold level can always be set according to the change in the contrast level of the original background paper, the reproduced picture with high quality can be obtained.
JP7527579A 1979-06-15 1979-06-15 Video processing method Pending JPS56774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7527579A JPS56774A (en) 1979-06-15 1979-06-15 Video processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7527579A JPS56774A (en) 1979-06-15 1979-06-15 Video processing method

Publications (1)

Publication Number Publication Date
JPS56774A true JPS56774A (en) 1981-01-07

Family

ID=13571507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7527579A Pending JPS56774A (en) 1979-06-15 1979-06-15 Video processing method

Country Status (1)

Country Link
JP (1) JPS56774A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784342A (en) * 1986-06-07 1988-11-15 Neumunstersche Maschinen- und Apparatebau GmbH Device for simultaneous spooling a plurality of threads

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784342A (en) * 1986-06-07 1988-11-15 Neumunstersche Maschinen- und Apparatebau GmbH Device for simultaneous spooling a plurality of threads

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