JPS5599879A - Virtuous reproduction method for intermediate tone - Google Patents

Virtuous reproduction method for intermediate tone

Info

Publication number
JPS5599879A
JPS5599879A JP599579A JP599579A JPS5599879A JP S5599879 A JPS5599879 A JP S5599879A JP 599579 A JP599579 A JP 599579A JP 599579 A JP599579 A JP 599579A JP S5599879 A JPS5599879 A JP S5599879A
Authority
JP
Japan
Prior art keywords
circuit
video signal
output
integration
density
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
JP599579A
Other languages
Japanese (ja)
Inventor
Takashi Saito
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP599579A priority Critical patent/JPS5599879A/en
Publication of JPS5599879A publication Critical patent/JPS5599879A/en
Pending legal-status Critical Current

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  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To virtually reproduce the intermediate tone even in the unit reporudcing only two value of white and black, by controlling the location density of recording dots in response to the concentration distribution of original picture.
CONSTITUTION: The system consists of the integration circuit 1 with reset terminal, comparison circuit 2, FF3, and input terminal 5 of reference voltage. The video signal inputted to the input terminal 4 is integrated for time with the circuit 1 and fed to the circuit 2. The circuit 2 inverts the output from low to high level when the input integration voltage reaches the reference value e. As soon as the output of the circuit 2 inverts to high level, the information is transferred to FF3 and it is held for the time corresponding to the 1 clock period. The circuit 1 is reset at the same time and the integration of the video signal is started again. With this constitution, if the output of FF3 is recorded as the video signal, the higher the manuscript density is, the higher is the arrangement density of the recording dots, to express the tone.
COPYRIGHT: (C)1980,JPO&Japio
JP599579A 1979-01-24 1979-01-24 Virtuous reproduction method for intermediate tone Pending JPS5599879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP599579A JPS5599879A (en) 1979-01-24 1979-01-24 Virtuous reproduction method for intermediate tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP599579A JPS5599879A (en) 1979-01-24 1979-01-24 Virtuous reproduction method for intermediate tone

Publications (1)

Publication Number Publication Date
JPS5599879A true JPS5599879A (en) 1980-07-30

Family

ID=11626360

Family Applications (1)

Application Number Title Priority Date Filing Date
JP599579A Pending JPS5599879A (en) 1979-01-24 1979-01-24 Virtuous reproduction method for intermediate tone

Country Status (1)

Country Link
JP (1) JPS5599879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62232270A (en) * 1986-04-02 1987-10-12 Matsushita Graphic Commun Syst Inc Half tone picture processor
JPS63310271A (en) * 1987-06-11 1988-12-19 Canon Inc Image processor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62232270A (en) * 1986-04-02 1987-10-12 Matsushita Graphic Commun Syst Inc Half tone picture processor
JPS63310271A (en) * 1987-06-11 1988-12-19 Canon Inc Image processor
JPH0691607B2 (en) * 1987-06-11 1994-11-14 キヤノン株式会社 Image processing method

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