JPS57115074A - Method for discriminating halftone picture region - Google Patents

Method for discriminating halftone picture region

Info

Publication number
JPS57115074A
JPS57115074A JP56001414A JP141481A JPS57115074A JP S57115074 A JPS57115074 A JP S57115074A JP 56001414 A JP56001414 A JP 56001414A JP 141481 A JP141481 A JP 141481A JP S57115074 A JPS57115074 A JP S57115074A
Authority
JP
Japan
Prior art keywords
inputted
halftone
bit
deciding
circuit
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
JP56001414A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0381345B2 (2
Inventor
Morizumi Kurose
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP56001414A priority Critical patent/JPS57115074A/ja
Publication of JPS57115074A publication Critical patent/JPS57115074A/ja
Publication of JPH0381345B2 publication Critical patent/JPH0381345B2/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
    • H04N1/40062—Discrimination between different image types, e.g. two-tone, continuous tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP56001414A 1981-01-08 1981-01-08 Method for discriminating halftone picture region Granted JPS57115074A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56001414A JPS57115074A (en) 1981-01-08 1981-01-08 Method for discriminating halftone picture region

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56001414A JPS57115074A (en) 1981-01-08 1981-01-08 Method for discriminating halftone picture region

Publications (2)

Publication Number Publication Date
JPS57115074A true JPS57115074A (en) 1982-07-17
JPH0381345B2 JPH0381345B2 (2) 1991-12-27

Family

ID=11500818

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56001414A Granted JPS57115074A (en) 1981-01-08 1981-01-08 Method for discriminating halftone picture region

Country Status (1)

Country Link
JP (1) JPS57115074A (2)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5566174A (en) * 1978-11-13 1980-05-19 Ricoh Co Ltd Reproducer of gradation picture
JPS55100549A (en) * 1979-01-24 1980-07-31 Nec Corp Image region signal generating method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5566174A (en) * 1978-11-13 1980-05-19 Ricoh Co Ltd Reproducer of gradation picture
JPS55100549A (en) * 1979-01-24 1980-07-31 Nec Corp Image region signal generating method

Also Published As

Publication number Publication date
JPH0381345B2 (2) 1991-12-27

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