JPS57137823A - Measuring device for dot area rate of color printed matter - Google Patents

Measuring device for dot area rate of color printed matter

Info

Publication number
JPS57137823A
JPS57137823A JP56024728A JP2472881A JPS57137823A JP S57137823 A JPS57137823 A JP S57137823A JP 56024728 A JP56024728 A JP 56024728A JP 2472881 A JP2472881 A JP 2472881A JP S57137823 A JPS57137823 A JP S57137823A
Authority
JP
Japan
Prior art keywords
densities
measured
inks
color densities
parts
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
JP56024728A
Other languages
Japanese (ja)
Other versions
JPH0232566B2 (en
Inventor
Hiroyuki Yonehara
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 JP56024728A priority Critical patent/JPS57137823A/en
Publication of JPS57137823A publication Critical patent/JPS57137823A/en
Publication of JPH0232566B2 publication Critical patent/JPH0232566B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
    • G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
    • G01J3/50—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors
    • G01J3/51—Measurement of colour; Colour measuring devices, e.g. colorimeters using electric radiation detectors using colour filters

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Spectrometry And Color Measurement (AREA)

Abstract

PURPOSE:To know dot constitution without requiring the degree of skill and to facilitate controlling of a printing machine by operating dot are rates from the intrinsic integrated color densities of solid printed parts and the meaured values of the color densities of the local places to be measured. CONSTITUTION:A storage part which stores the intrinsic integrated densities of the sold printed parts of inks of cyan, magenta and yellow colors and the color densities of the local parts to be measured of the halftone printed matter by these inks, and an arithmetic part which operates dot area rates arithmetically by substituting the stored values in the equation 2 are provided. For example, the densities DR, DG, DB of the red (R), green (G), and blue (B) of the parts to be measured of the inks of cyan (C), magenta (M), and yellow (Y) are measured by inserting R, G, B filters 2, thence only the main densities of the respective inks are taken out and the temporary dot area rates are determined and these are so corrected that the differences between the respective 3 color densities by these and the respectively measured 3 color densities are kept within a permissible error range. The results are displayed in percentage.
JP56024728A 1981-02-20 1981-02-20 Measuring device for dot area rate of color printed matter Granted JPS57137823A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56024728A JPS57137823A (en) 1981-02-20 1981-02-20 Measuring device for dot area rate of color printed matter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56024728A JPS57137823A (en) 1981-02-20 1981-02-20 Measuring device for dot area rate of color printed matter

Publications (2)

Publication Number Publication Date
JPS57137823A true JPS57137823A (en) 1982-08-25
JPH0232566B2 JPH0232566B2 (en) 1990-07-20

Family

ID=12146208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56024728A Granted JPS57137823A (en) 1981-02-20 1981-02-20 Measuring device for dot area rate of color printed matter

Country Status (1)

Country Link
JP (1) JPS57137823A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605669A (en) * 1983-06-24 1985-01-12 Canon Inc Multi-value output system
JPH02110566A (en) * 1988-10-20 1990-04-23 Fuji Photo Film Co Ltd Photometer and colorimeter for print control

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528301A (en) * 1975-07-08 1977-01-22 Dainippon Screen Mfg Masking method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS528301A (en) * 1975-07-08 1977-01-22 Dainippon Screen Mfg Masking method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS605669A (en) * 1983-06-24 1985-01-12 Canon Inc Multi-value output system
JPH02110566A (en) * 1988-10-20 1990-04-23 Fuji Photo Film Co Ltd Photometer and colorimeter for print control

Also Published As

Publication number Publication date
JPH0232566B2 (en) 1990-07-20

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