JPS5731097A - Variable density picture recording system - Google Patents

Variable density picture recording system

Info

Publication number
JPS5731097A
JPS5731097A JP10608180A JP10608180A JPS5731097A JP S5731097 A JPS5731097 A JP S5731097A JP 10608180 A JP10608180 A JP 10608180A JP 10608180 A JP10608180 A JP 10608180A JP S5731097 A JPS5731097 A JP S5731097A
Authority
JP
Japan
Prior art keywords
signal
density
picture
input
value
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.)
Granted
Application number
JP10608180A
Other languages
Japanese (ja)
Other versions
JPS6221471B2 (en
Inventor
Kunio Yoshida
Hiroaki Kodera
Yukifumi Tsuda
Yoshimitsu Sugano
Kison Naka
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.)
Matsushita Giken KK
Original Assignee
Matsushita Giken KK
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 Matsushita Giken KK filed Critical Matsushita Giken KK
Priority to JP10608180A priority Critical patent/JPS5731097A/en
Priority to US06/288,513 priority patent/US4394662A/en
Priority to DE3130207A priority patent/DE3130207C2/en
Priority to GB8123485A priority patent/GB2082871B/en
Publication of JPS5731097A publication Critical patent/JPS5731097A/en
Publication of JPS6221471B2 publication Critical patent/JPS6221471B2/ja
Granted 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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4051—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a dispersed dots halftone pattern, the dots having substantially the same size

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE To improve a density reproducing characteristic through permitting an output density for an input density to probably make upper and lower distributions of a central value, by deciding a generating probability of an instantaneous value against an input through adding the second signal given by a probability density function having said generating probability as a variable to an input density signal. CONSTITUTION:A picture having variable density is scanned and a picture signal according to the density is generated from a picture signal generator 1. Further said picture signal is added to a signal from the second signal generator 3 in a signal adder 2. An output signal from the adder 2 is added to an input characteristic correcting device 4, and a picture signal corrected in the corrector 4 is recorded in a variable density picture recorder 5, thereby recorded dots of a recording medium 6 are formed by the storage 5. The second signal from the signal generator 3 is made to be a signal so that an instantaneous value applied to the correcting device 4 can be generated with an equal probability in section extending from plus to minus, further, their polarities can be reversed in synchronizing with a scanning clock. Further a range taken by an instantaneous value sandwiches zero and the valve is a value ranging 0.25-2 times the input value corresponding to a threshold value of output density.
JP10608180A 1980-07-31 1980-07-31 Variable density picture recording system Granted JPS5731097A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP10608180A JPS5731097A (en) 1980-07-31 1980-07-31 Variable density picture recording system
US06/288,513 US4394662A (en) 1980-07-31 1981-07-30 Dot printer for reproduction of halftone images
DE3130207A DE3130207C2 (en) 1980-07-31 1981-07-30 Dot printer with a recording head
GB8123485A GB2082871B (en) 1980-07-31 1981-07-31 Dot printer for reproduction of halftone images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10608180A JPS5731097A (en) 1980-07-31 1980-07-31 Variable density picture recording system

Publications (2)

Publication Number Publication Date
JPS5731097A true JPS5731097A (en) 1982-02-19
JPS6221471B2 JPS6221471B2 (en) 1987-05-13

Family

ID=14424616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10608180A Granted JPS5731097A (en) 1980-07-31 1980-07-31 Variable density picture recording system

Country Status (1)

Country Link
JP (1) JPS5731097A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156267A (en) * 1982-03-12 1983-09-17 Matsushita Giken Kk Compensating system of variable-density picture signal
JPS616980A (en) * 1984-06-21 1986-01-13 Matsushita Electric Ind Co Ltd Binarization processing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156267A (en) * 1982-03-12 1983-09-17 Matsushita Giken Kk Compensating system of variable-density picture signal
JPS616980A (en) * 1984-06-21 1986-01-13 Matsushita Electric Ind Co Ltd Binarization processing method

Also Published As

Publication number Publication date
JPS6221471B2 (en) 1987-05-13

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