JPS57192171A - Picture processing device - Google Patents

Picture processing device

Info

Publication number
JPS57192171A
JPS57192171A JP56075751A JP7575181A JPS57192171A JP S57192171 A JPS57192171 A JP S57192171A JP 56075751 A JP56075751 A JP 56075751A JP 7575181 A JP7575181 A JP 7575181A JP S57192171 A JPS57192171 A JP S57192171A
Authority
JP
Japan
Prior art keywords
circuit
picture
output signal
threshold value
binary
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
JP56075751A
Other languages
Japanese (ja)
Other versions
JPH0252908B2 (en
Inventor
Hirokawa Hayashi
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 JP56075751A priority Critical patent/JPS57192171A/en
Publication of JPS57192171A publication Critical patent/JPS57192171A/en
Publication of JPH0252908B2 publication Critical patent/JPH0252908B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Character Input (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To reject noise of the background without missing of picture information and to make picture reproduction with high quality, and ANDing the outputs among a binary circuit, a pattern forming circuit and a harmonizing circuit with a logical processing circuit. CONSTITUTION:A binary circuit 40 binarizes multi-value input picture information S1 with a prescribed threshold value, and a binary circuit 60 which is the similar constitution as the circuit 40 and has different threshold value binarizes input information with the threshold value at higher density side than that of the circuit 40. A pattern forming circuit 50 recognizes an input picture part and a non-picture part based on an output signal of the circuit 40 for patterning. Further, picture elements around a part being black picture elements with an output signal S4 of the circuit 60 are compulsively changed into the picture parts for the adjacent non-picture parts with a harmonizing circuit 70. A ligical processing circuit 80 logically ANDs an output signal S2 of the circuit 40, an output signal S3 of the circuit 50 and an output signal S5 of the circuit 70 with each other, and outputs a signal S6.
JP56075751A 1981-05-21 1981-05-21 Picture processing device Granted JPS57192171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56075751A JPS57192171A (en) 1981-05-21 1981-05-21 Picture processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56075751A JPS57192171A (en) 1981-05-21 1981-05-21 Picture processing device

Publications (2)

Publication Number Publication Date
JPS57192171A true JPS57192171A (en) 1982-11-26
JPH0252908B2 JPH0252908B2 (en) 1990-11-15

Family

ID=13585270

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56075751A Granted JPS57192171A (en) 1981-05-21 1981-05-21 Picture processing device

Country Status (1)

Country Link
JP (1) JPS57192171A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02135586A (en) * 1988-11-16 1990-05-24 Nec Corp Optical character reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02135586A (en) * 1988-11-16 1990-05-24 Nec Corp Optical character reader

Also Published As

Publication number Publication date
JPH0252908B2 (en) 1990-11-15

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