JPS56125160A - Picture display system - Google Patents

Picture display system

Info

Publication number
JPS56125160A
JPS56125160A JP2938580A JP2938580A JPS56125160A JP S56125160 A JPS56125160 A JP S56125160A JP 2938580 A JP2938580 A JP 2938580A JP 2938580 A JP2938580 A JP 2938580A JP S56125160 A JPS56125160 A JP S56125160A
Authority
JP
Japan
Prior art keywords
point
level
dither matrix
density
appearance
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
JP2938580A
Other languages
Japanese (ja)
Other versions
JPS6130793B2 (en
Inventor
Fumitaka Ono
Masaru Onishi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2938580A priority Critical patent/JPS56125160A/en
Publication of JPS56125160A publication Critical patent/JPS56125160A/en
Publication of JPS6130793B2 publication Critical patent/JPS6130793B2/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
    • H04N1/41—Bandwidth or redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To enable the recording with high quality, by reducing the appearance of intermediate level, in the device unstable in outputting the density of intermediate level. CONSTITUTION:When the dither matrix is 2X2 and the recorded density level takes three values of 0,1/2 and 1, one dither matrix can be represented with 4 points. Different threshould value is given to each point. The threshold value at the point dij in the dither matrix is decided with the number of points in the matrix, location of each point and recordable level. Since the number of times of appearance of 0 and 1 becomes many for the recorded density at each point, the intermediate tone of a half tone which is unstable is prevented from appearing continuously.
JP2938580A 1980-03-07 1980-03-07 Picture display system Granted JPS56125160A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2938580A JPS56125160A (en) 1980-03-07 1980-03-07 Picture display system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2938580A JPS56125160A (en) 1980-03-07 1980-03-07 Picture display system

Publications (2)

Publication Number Publication Date
JPS56125160A true JPS56125160A (en) 1981-10-01
JPS6130793B2 JPS6130793B2 (en) 1986-07-16

Family

ID=12274663

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2938580A Granted JPS56125160A (en) 1980-03-07 1980-03-07 Picture display system

Country Status (1)

Country Link
JP (1) JPS56125160A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173973A (en) * 1982-04-06 1983-10-12 Canon Inc Picture processing method
JPH01122270A (en) * 1987-11-06 1989-05-15 Ricoh Co Ltd Multi-value gradation processor for image
JPH027667A (en) * 1989-04-06 1990-01-11 Canon Inc Picture processing unit
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
US5712929A (en) * 1982-04-06 1998-01-27 Canon Kabushiki Kaisha Image processing apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58173973A (en) * 1982-04-06 1983-10-12 Canon Inc Picture processing method
US5666444A (en) * 1982-04-06 1997-09-09 Canon Kabushiki Kaisha Image processing apparatus
US5712929A (en) * 1982-04-06 1998-01-27 Canon Kabushiki Kaisha Image processing apparatus
JPH01122270A (en) * 1987-11-06 1989-05-15 Ricoh Co Ltd Multi-value gradation processor for image
JPH027667A (en) * 1989-04-06 1990-01-11 Canon Inc Picture processing unit

Also Published As

Publication number Publication date
JPS6130793B2 (en) 1986-07-16

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