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JPS5776559A - Processing method of intermediate tone image - Google Patents

Processing method of intermediate tone image

Info

Publication number
JPS5776559A
JPS5776559A JP55151477A JP15147780A JPS5776559A JP S5776559 A JPS5776559 A JP S5776559A JP 55151477 A JP55151477 A JP 55151477A JP 15147780 A JP15147780 A JP 15147780A JP S5776559 A JPS5776559 A JP S5776559A
Authority
JP
Japan
Prior art keywords
image
tone
brightness
black
steps
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
JP55151477A
Other languages
Japanese (ja)
Other versions
JPH0219668B2 (en
Inventor
Naoto Kawamura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP55151477A priority Critical patent/JPS5776559A/en
Publication of JPS5776559A publication Critical patent/JPS5776559A/en
Priority to US06/583,294 priority patent/US4491875A/en
Publication of JPH0219668B2 publication Critical patent/JPH0219668B2/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
    • H04N1/40087—Multi-toning, i.e. converting a continuous-tone signal for reproduction with more than two discrete brightnesses or optical densities, e.g. dots of grey and black inks on white paper
    • 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
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4057—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laser Beam Printer (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To obtain an intermediate tone image of a high tone wedge and high image resolution, by expressing the tone wedge of a micro image elements forming a image element with a matrix distribution in the brightness of >=3 steps of black, binary white and intermediate value between the black and the white respectively. CONSTITUTION:An image element 10 which forms an image is formed by arraying micro image elements 11 of 2X2 units of n=2 in a matrix form. The tone wedge of the element 11 is expressed in the brightness of 3 steps of black, binary white and intermediate value between the black and the white respectively. Thus the image elements 10 of the brightness of 9 tone wedges of 2Xn<2>+1=9 by the combination of the elements 11 in comparison with 5 tone wedges of 2Xn+1 with use of the brightness of 2 steps. Accordingly an intermediate tone image is obtained with a high tone wedge and high image resolution in comparison with an image obtained b using the micro image element in the brightness of 2 steps. The tone wedge of the micro image element can be decided by the black, the form with a prescribed color and its area, etc.
JP55151477A 1980-10-30 1980-10-30 Processing method of intermediate tone image Granted JPS5776559A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55151477A JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image
US06/583,294 US4491875A (en) 1980-10-30 1984-02-28 Apparatus and method for tonal image processing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55151477A JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image

Publications (2)

Publication Number Publication Date
JPS5776559A true JPS5776559A (en) 1982-05-13
JPH0219668B2 JPH0219668B2 (en) 1990-05-02

Family

ID=15519358

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55151477A Granted JPS5776559A (en) 1980-10-30 1980-10-30 Processing method of intermediate tone image

Country Status (1)

Country Link
JP (1) JPS5776559A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021291A (en) * 1983-07-15 1985-02-02 Canon Inc Reproduction of color image
JPS6031167A (en) * 1983-08-01 1985-02-16 Canon Inc Image recording method
EP0142767A2 (en) * 1983-11-21 1985-05-29 International Business Machines Corporation Manipulation of graphics image data
JPS60194472A (en) * 1984-03-15 1985-10-02 Konishiroku Photo Ind Co Ltd Picture recorder
DE3516375A1 (en) * 1984-05-07 1985-11-07 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa RECORDING DEVICE
DE3516373A1 (en) * 1984-05-07 1985-11-07 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa DATA RECORDING DEVICE
JPH01102584A (en) * 1987-10-16 1989-04-20 Ricoh Co Ltd Image transfer device
JPH0224167A (en) * 1988-05-20 1990-01-26 Xerox Corp Method of regenerating middle tone picture
JPH05502992A (en) * 1990-11-21 1993-05-20 ポラロイド　コーポレーシヨン Printing method
JPH05503199A (en) * 1990-11-21 1993-05-27 ポラロイド　コーポレーシヨン Printing device and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583066A (en) * 1978-12-17 1980-06-23 Ricoh Co Ltd Function generator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5583066A (en) * 1978-12-17 1980-06-23 Ricoh Co Ltd Function generator

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6021291A (en) * 1983-07-15 1985-02-02 Canon Inc Reproduction of color image
JPS6031167A (en) * 1983-08-01 1985-02-16 Canon Inc Image recording method
EP0142767A2 (en) * 1983-11-21 1985-05-29 International Business Machines Corporation Manipulation of graphics image data
JPS60194472A (en) * 1984-03-15 1985-10-02 Konishiroku Photo Ind Co Ltd Picture recorder
DE3516375A1 (en) * 1984-05-07 1985-11-07 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa RECORDING DEVICE
DE3516373A1 (en) * 1984-05-07 1985-11-07 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa DATA RECORDING DEVICE
JPH01102584A (en) * 1987-10-16 1989-04-20 Ricoh Co Ltd Image transfer device
JPH0224167A (en) * 1988-05-20 1990-01-26 Xerox Corp Method of regenerating middle tone picture
JPH05502992A (en) * 1990-11-21 1993-05-20 ポラロイド　コーポレーシヨン Printing method
JPH05503199A (en) * 1990-11-21 1993-05-27 ポラロイド　コーポレーシヨン Printing device and method

Also Published As

Publication number Publication date
JPH0219668B2 (en) 1990-05-02

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