JPS5711576A - Facsimile system - Google Patents

Facsimile system

Info

Publication number
JPS5711576A
JPS5711576A JP8549980A JP8549980A JPS5711576A JP S5711576 A JPS5711576 A JP S5711576A JP 8549980 A JP8549980 A JP 8549980A JP 8549980 A JP8549980 A JP 8549980A JP S5711576 A JPS5711576 A JP S5711576A
Authority
JP
Japan
Prior art keywords
signal
picture
dither
area
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
JP8549980A
Other languages
Japanese (ja)
Inventor
Koichi Ejiri
Yoshitoshi Yamauchi
Morizumi Kurose
Akira Sakurai
Hirokawa Hayashi
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 JP8549980A priority Critical patent/JPS5711576A/en
Publication of JPS5711576A publication Critical patent/JPS5711576A/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
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To record a picture with high quality and high video density, by making data-compression so as to obtain the optimized coding which sufficiently express the intermediate tone acocrding to the characteristic of an original picture. CONSTITUTION:An original picture is read in at a scanner 1 at a transmission side A, and it is quantized at a quantizer 3 after an analog background correction 2. Next, a signal in contrast picture area picked up via a switch 6 and a logical circuit 7 is applied to an edition circuit 8 for required picture editing process. Further, the signal is in high video element density dither processing 10, and binarized information is applied to a dither encoder 11 for coding and output. On the other hand, a signal from a transmission line NET is received at a reception side, the signal is discriminated at an area discrimination circuit 20 via a MODEM18, and when the video element reaches a contrast video area with a dither decoder 21, decoding is made and recorded on a plotter 25 as the signal in high video element density.
JP8549980A 1980-06-24 1980-06-24 Facsimile system Pending JPS5711576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8549980A JPS5711576A (en) 1980-06-24 1980-06-24 Facsimile system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8549980A JPS5711576A (en) 1980-06-24 1980-06-24 Facsimile system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP56165268A Division JPS57127365A (en) 1981-10-16 1981-10-16 Facsimile system

Publications (1)

Publication Number Publication Date
JPS5711576A true JPS5711576A (en) 1982-01-21

Family

ID=13860619

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8549980A Pending JPS5711576A (en) 1980-06-24 1980-06-24 Facsimile system

Country Status (1)

Country Link
JP (1) JPS5711576A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188961A (en) * 1982-04-28 1983-11-04 Canon Inc Picture formation system
JPS6134073A (en) * 1984-03-29 1986-02-18 Denki Kagaku Kogyo Kk Acetylene black and production thereof
JPH06342469A (en) * 1994-04-11 1994-12-13 Canon Inc Image processor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58188961A (en) * 1982-04-28 1983-11-04 Canon Inc Picture formation system
JPS6134073A (en) * 1984-03-29 1986-02-18 Denki Kagaku Kogyo Kk Acetylene black and production thereof
JPH0471109B2 (en) * 1984-03-29 1992-11-12 Denki Kagaku Kogyo Kk
JPH06342469A (en) * 1994-04-11 1994-12-13 Canon Inc Image processor

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