JPS54124923A - Processing system for multi-gradation picture signal - Google Patents

Processing system for multi-gradation picture signal

Info

Publication number
JPS54124923A
JPS54124923A JP3346578A JP3346578A JPS54124923A JP S54124923 A JPS54124923 A JP S54124923A JP 3346578 A JP3346578 A JP 3346578A JP 3346578 A JP3346578 A JP 3346578A JP S54124923 A JPS54124923 A JP S54124923A
Authority
JP
Japan
Prior art keywords
output
tone
signal
picture
gradation
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
JP3346578A
Other languages
Japanese (ja)
Other versions
JPS6056345B2 (en
Inventor
Yuichi Kishi
Akio Taguchi
Norio Kataoka
Hironari Inagaki
Harumitsu Shimizu
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
Tamura Electric Works Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Tamura Electric Works 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 Nippon Telegraph and Telephone Corp, Tamura Electric Works Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP53033465A priority Critical patent/JPS6056345B2/en
Publication of JPS54124923A publication Critical patent/JPS54124923A/en
Publication of JPS6056345B2 publication Critical patent/JPS6056345B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE: To make it possible to improve the resolution of a half tone as high as that of a black and white signal by gating a half-tone signal and then by mixing this gate output with a white signal output to obtain a picture signal output including the half tone.
CONSTITUTION: Picture analog signal generating part 1 extracts and decomposes an analog picture signal output, equivalent to the reflection coefficienty of an original, into picture signals and outputs them as serial picture signals, and thickness-gradation separating part 2 extracts a multi-gradation output including the half- tone output from the picture signal of generating part 1 corresponding to the (n)- number decision levels. Corresponding to those decision levels, thickness-gradation equivalent signal generating part 3 sends out clock pulse CP with its duty ratio controlled, and then gates the half-tone output to mix 4 the gate output with the white signal output, thereby obtaining the picture signal output including the half tone. Consequently, the resolution of the half tone can be improved as high as that of the black and white signal.
COPYRIGHT: (C)1979,JPO&Japio
JP53033465A 1978-03-23 1978-03-23 Multi-gradation image signal processing method Expired JPS6056345B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53033465A JPS6056345B2 (en) 1978-03-23 1978-03-23 Multi-gradation image signal processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53033465A JPS6056345B2 (en) 1978-03-23 1978-03-23 Multi-gradation image signal processing method

Publications (2)

Publication Number Publication Date
JPS54124923A true JPS54124923A (en) 1979-09-28
JPS6056345B2 JPS6056345B2 (en) 1985-12-10

Family

ID=12387285

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53033465A Expired JPS6056345B2 (en) 1978-03-23 1978-03-23 Multi-gradation image signal processing method

Country Status (1)

Country Link
JP (1) JPS6056345B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694876A (en) * 1979-12-27 1981-07-31 Fujitsu Ltd Video signal processing method
JPS56112175A (en) * 1980-02-08 1981-09-04 Fuji Photo Film Co Ltd Laser recording device
JPS58114572A (en) * 1981-12-26 1983-07-07 Photo Composing Mach Mfg Co Ltd Picture forming system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084128A (en) * 1973-11-26 1975-07-07
JPS52109322A (en) * 1976-03-10 1977-09-13 Hitachi Ltd Gradation binary value signal generating device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5084128A (en) * 1973-11-26 1975-07-07
JPS52109322A (en) * 1976-03-10 1977-09-13 Hitachi Ltd Gradation binary value signal generating device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5694876A (en) * 1979-12-27 1981-07-31 Fujitsu Ltd Video signal processing method
JPS56112175A (en) * 1980-02-08 1981-09-04 Fuji Photo Film Co Ltd Laser recording device
JPS6363148B2 (en) * 1980-02-08 1988-12-06
JPS58114572A (en) * 1981-12-26 1983-07-07 Photo Composing Mach Mfg Co Ltd Picture forming system
JPS6159028B2 (en) * 1981-12-26 1986-12-15 Shaken Kk

Also Published As

Publication number Publication date
JPS6056345B2 (en) 1985-12-10

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