JPS5688138A - Forming method of memory table - Google Patents

Forming method of memory table

Info

Publication number
JPS5688138A
JPS5688138A JP16553979A JP16553979A JPS5688138A JP S5688138 A JPS5688138 A JP S5688138A JP 16553979 A JP16553979 A JP 16553979A JP 16553979 A JP16553979 A JP 16553979A JP S5688138 A JPS5688138 A JP S5688138A
Authority
JP
Japan
Prior art keywords
polygonal line
correction
memory
function
generator
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
JP16553979A
Other languages
Japanese (ja)
Other versions
JPH0151829B2 (en
Inventor
Fumio Okada
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.)
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Dainippon Screen Manufacturing 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 Dainippon Screen Manufacturing Co Ltd filed Critical Dainippon Screen Manufacturing Co Ltd
Priority to JP16553979A priority Critical patent/JPS5688138A/en
Priority to GB8039576A priority patent/GB2073987B/en
Priority to DE19803047695 priority patent/DE3047695C2/en
Priority to FR8027411A priority patent/FR2473236B1/en
Publication of JPS5688138A publication Critical patent/JPS5688138A/en
Publication of JPH0151829B2 publication Critical patent/JPH0151829B2/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
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control
    • H04N1/6027—Correction or control of colour gradation or colour contrast
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • 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
    • H04N1/46—Colour picture communication systems
    • H04N1/56—Processing of colour picture signals
    • H04N1/60—Colour correction or control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE: To enable a memory table to be rapidly set up with a small-capacity memory by forming a group of polygonal line data of a characteristic curve for digital color scanning by the combination of the contents of both basic and correction tables.
CONSTITUTION: Corresponding basic area 11 is read out of the basic table of polygonal line data memory device 10 by area selecting means 19 of table forming device 8, and it is applied to polygonal line approximate function generator 12. Generator 12 accesses correction memory device 13 of a correction table and generates a polygonal line function corresponding to area 11. This function and a correction function in block 17 of device 13 corresponding to the address of generator 12 selected with table selecting means 18 are arithmetically combined with each other in adding and subtracting circuit 14 and written in memory device 1 forming a polygonal line group table. By the combination of the contents of the main and auxiliary tables polygonal line group data are formed. Thus, rapid setup fit for desired color scanning is carried out with such main and secondary memory tables of small capacity.
COPYRIGHT: (C)1981,JPO&Japio
JP16553979A 1979-12-21 1979-12-21 Forming method of memory table Granted JPS5688138A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP16553979A JPS5688138A (en) 1979-12-21 1979-12-21 Forming method of memory table
GB8039576A GB2073987B (en) 1979-12-21 1980-12-10 Memory table
DE19803047695 DE3047695C2 (en) 1979-12-21 1980-12-18 Method and apparatus for producing a memory table for color control conditions
FR8027411A FR2473236B1 (en) 1979-12-21 1980-12-22 METHOD AND MACHINE FOR PREPARING A MEMORY TABLE FOR CONTROLLING COLOR CONDITIONS IN AN IMAGE REPRODUCING MACHINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16553979A JPS5688138A (en) 1979-12-21 1979-12-21 Forming method of memory table

Publications (2)

Publication Number Publication Date
JPS5688138A true JPS5688138A (en) 1981-07-17
JPH0151829B2 JPH0151829B2 (en) 1989-11-06

Family

ID=15814300

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16553979A Granted JPS5688138A (en) 1979-12-21 1979-12-21 Forming method of memory table

Country Status (4)

Country Link
JP (1) JPS5688138A (en)
DE (1) DE3047695C2 (en)
FR (1) FR2473236B1 (en)
GB (1) GB2073987B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171276A (en) * 1983-03-17 1984-09-27 Canon Inc Picture processing device
JPS60148292A (en) * 1983-12-27 1985-08-05 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Color video camera
JPS61138941A (en) * 1984-12-12 1986-06-26 Fuji Photo Film Co Ltd Inspection device for color film
JPS61248166A (en) * 1985-04-25 1986-11-05 Matsushita Electric Ind Co Ltd Jaggy removing device
JPS6297474A (en) * 1985-10-23 1987-05-06 Toshiba Corp Image processor
JPH06113126A (en) * 1992-09-28 1994-04-22 Mita Ind Co Ltd Method and device for correcting color

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4496968A (en) * 1981-07-14 1985-01-29 Crosfield Electronics Limited Reproduction of colored images
US4396938A (en) * 1981-07-23 1983-08-02 Rca Corporation Controlled ram signal processor
JPS5863989A (en) * 1981-10-13 1983-04-16 大日本スクリ−ン製造株式会社 Contrast correction of output data for digital image processor
DE3408108A1 (en) * 1983-03-06 1984-09-06 Canon K.K., Tokio/Tokyo Image processing device
US4745466A (en) * 1983-03-06 1988-05-17 Canon Kabushiki Kaisha Digital color image processing apparatus with color masking processing unit addressed by a plurality of multi-bit color component signals using various combinations of the bits of the signals
US4727434A (en) * 1984-03-14 1988-02-23 Canon Kabushiki Kaisha Image processing apparatus for rapid production of a hard copy of a video image in which input image signal processing parameters are set while a record medium is being positioned at a recording position
JPS60252139A (en) * 1984-05-28 1985-12-12 Nippon Denso Co Ltd Control device for engine
JPS62243478A (en) * 1986-04-16 1987-10-23 Canon Inc Color copying machine
DE3629469C2 (en) * 1986-08-29 1994-10-06 Agfa Gevaert Ag Process for adjusting the color saturation in electronic image processing
EP0258740B1 (en) * 1986-09-02 1995-07-19 Fuji Photo Film Co., Ltd. Method of and apparatus for processing an image with gradation correction of video signal
JPS63309077A (en) * 1987-06-11 1988-12-16 Seikosha Co Ltd Video printer
GB2206261B (en) * 1987-06-22 1992-02-05 Konishiroku Photo Ind Multicolour image forming method and apparatus
DE69418512T2 (en) * 1993-03-08 1999-10-28 Canon Information Systems Research Australia Pty. Ltd., North Ryde Color conversion device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486353A (en) * 1977-12-22 1979-07-09 Canon Inc Recorder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612753A (en) * 1969-04-23 1971-10-12 Ventures Res & Dev Self-adaptive system for the reproduction of color
US3893166A (en) * 1972-01-05 1975-07-01 Crosfield Electronics Ltd Colour correcting image reproducing methods and apparatus
FR2425672A1 (en) * 1978-05-12 1979-12-07 Cyberexact Digital programmed function generator for industrial control system - operates using memory and calculator for interpolation of function values

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486353A (en) * 1977-12-22 1979-07-09 Canon Inc Recorder

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59171276A (en) * 1983-03-17 1984-09-27 Canon Inc Picture processing device
JPH0142558B2 (en) * 1983-03-17 1989-09-13 Canon Kk
JPS60148292A (en) * 1983-12-27 1985-08-05 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Color video camera
JPS61138941A (en) * 1984-12-12 1986-06-26 Fuji Photo Film Co Ltd Inspection device for color film
JPH0473857B2 (en) * 1984-12-12 1992-11-24
JPS61248166A (en) * 1985-04-25 1986-11-05 Matsushita Electric Ind Co Ltd Jaggy removing device
JPS6297474A (en) * 1985-10-23 1987-05-06 Toshiba Corp Image processor
JPH06113126A (en) * 1992-09-28 1994-04-22 Mita Ind Co Ltd Method and device for correcting color

Also Published As

Publication number Publication date
FR2473236A1 (en) 1981-07-10
GB2073987B (en) 1983-11-02
FR2473236B1 (en) 1987-01-16
DE3047695C2 (en) 1986-01-16
GB2073987A (en) 1981-10-21
DE3047695A1 (en) 1981-09-24
JPH0151829B2 (en) 1989-11-06

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