JPH0239152B2 - - Google Patents

Info

Publication number
JPH0239152B2
JPH0239152B2 JP56041654A JP4165481A JPH0239152B2 JP H0239152 B2 JPH0239152 B2 JP H0239152B2 JP 56041654 A JP56041654 A JP 56041654A JP 4165481 A JP4165481 A JP 4165481A JP H0239152 B2 JPH0239152 B2 JP H0239152B2
Authority
JP
Japan
Prior art keywords
matrix
image
threshold
dither
frequency
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.)
Expired - Lifetime
Application number
JP56041654A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57159172A (en
Inventor
Masahiko Matsunawa
Haruo Iwahashi
Hiroshi Tokunaga
Noryoshi Tarumi
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP56041654A priority Critical patent/JPS57159172A/ja
Publication of JPS57159172A publication Critical patent/JPS57159172A/ja
Publication of JPH0239152B2 publication Critical patent/JPH0239152B2/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
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP56041654A 1981-03-24 1981-03-24 Image processor Granted JPS57159172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56041654A JPS57159172A (en) 1981-03-24 1981-03-24 Image processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56041654A JPS57159172A (en) 1981-03-24 1981-03-24 Image processor

Publications (2)

Publication Number Publication Date
JPS57159172A JPS57159172A (en) 1982-10-01
JPH0239152B2 true JPH0239152B2 (sv) 1990-09-04

Family

ID=12614345

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56041654A Granted JPS57159172A (en) 1981-03-24 1981-03-24 Image processor

Country Status (1)

Country Link
JP (1) JPS57159172A (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0234809B1 (en) * 1986-02-14 2001-05-16 Canon Kabushiki Kaisha Image processing apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187921A (sv) * 1975-01-20 1976-07-31 Ibm
JPS54144127A (en) * 1978-05-01 1979-11-10 Ricoh Co Ltd Display system of intermediate tone by binary picture element
JPS5580958A (en) * 1978-12-15 1980-06-18 Toshiba Corp Picture signal binary coding system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5187921A (sv) * 1975-01-20 1976-07-31 Ibm
JPS54144127A (en) * 1978-05-01 1979-11-10 Ricoh Co Ltd Display system of intermediate tone by binary picture element
JPS5580958A (en) * 1978-12-15 1980-06-18 Toshiba Corp Picture signal binary coding system

Also Published As

Publication number Publication date
JPS57159172A (en) 1982-10-01

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