JPS5731262A - Picture processing system - Google Patents

Picture processing system

Info

Publication number
JPS5731262A
JPS5731262A JP10664280A JP10664280A JPS5731262A JP S5731262 A JPS5731262 A JP S5731262A JP 10664280 A JP10664280 A JP 10664280A JP 10664280 A JP10664280 A JP 10664280A JP S5731262 A JPS5731262 A JP S5731262A
Authority
JP
Japan
Prior art keywords
circuit
density
picture element
level
arithmetic 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.)
Pending
Application number
JP10664280A
Other languages
Japanese (ja)
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 JP10664280A priority Critical patent/JPS5731262A/en
Publication of JPS5731262A publication Critical patent/JPS5731262A/en
Pending 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
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

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

Abstract

PURPOSE:To ensure the effective elimination of only the texture noise, by setting the threshold level at a value little less than the maximum value of the density- based total differential sum and according to the variation of the fluctuation coefficient of the level of density in a specified picture element region centering on the noticed picture element. CONSTITUTION:The input picture signals BS received the multivalue quantization are accumulated in a multivalue information storage circuit 1 with every picture element. Based on the contents of storage, the fluctuation soefficient t is calculated through a mean value arithmetic circuit 2, a square sum mean value arithmetic circuit 3 and a fluctuationcoefficient arithmetic circuit respectively. At the same time, the maximum value sigmajmax of the density-based total differential sum sigma1 is detected 7, and both the value sigmajmax and the coefficient t are sent to a threshold level arithmetic circuit 8. The optimum thereshold level L set by the circuit 8 is applied to a binary coding circuit 9, and the comparison is given to the level of density of a noticed picture element X which is sent from the circuit 1 through a delaying circuit 10.
JP10664280A 1980-08-01 1980-08-01 Picture processing system Pending JPS5731262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10664280A JPS5731262A (en) 1980-08-01 1980-08-01 Picture processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10664280A JPS5731262A (en) 1980-08-01 1980-08-01 Picture processing system

Publications (1)

Publication Number Publication Date
JPS5731262A true JPS5731262A (en) 1982-02-19

Family

ID=14438767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10664280A Pending JPS5731262A (en) 1980-08-01 1980-08-01 Picture processing system

Country Status (1)

Country Link
JP (1) JPS5731262A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03159370A (en) * 1989-11-16 1991-07-09 Canon Inc Picture processing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03159370A (en) * 1989-11-16 1991-07-09 Canon Inc Picture processing method

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