JPS56153883A - Picture processing method - Google Patents

Picture processing method

Info

Publication number
JPS56153883A
JPS56153883A JP5672880A JP5672880A JPS56153883A JP S56153883 A JPS56153883 A JP S56153883A JP 5672880 A JP5672880 A JP 5672880A JP 5672880 A JP5672880 A JP 5672880A JP S56153883 A JPS56153883 A JP S56153883A
Authority
JP
Japan
Prior art keywords
circuit
picture
noise
picture element
threshold level
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
JP5672880A
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 JP5672880A priority Critical patent/JPS56153883A/en
Publication of JPS56153883A publication Critical patent/JPS56153883A/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

Abstract

PURPOSE:To reproduce a high-quality picture being eliminated noise, by setting an optimum threshold level flexibly in accordance with picture element information of a specific picture element region and by making the level high when the state of an original picture is defective and the noise or the like is mixed. CONSTITUTION:Picture signal BS obtained by reading the original picture in the picture element unit is quantized into multilevels by A/D converter 2, and density levels of respective picture elements in a specific region of nXn constitution are stored temporarily collectively in multilevel density information storing circuit 2. The maximum value and the minimum value of respective picture element information read out from circuit 2 are detected by maximum value detecting circuit 3 and minimum value detecting circuit 4, and an optimum threshold level is calculated in threshold level setting circuit 5 in accordance with the output state of circuits 3 and 4. Noise elimination instructing signal NDS instructed by the operator is applied to circuit 5 and comparison decision operating circuit 6, and the optimum level and respective output information from circuit 2 and compared and decided by circuit 6, and noise components of the specific region designated by signal NDS are eliminated to make picture elements into binary code.
JP5672880A 1980-04-28 1980-04-28 Picture processing method Pending JPS56153883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5672880A JPS56153883A (en) 1980-04-28 1980-04-28 Picture processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5672880A JPS56153883A (en) 1980-04-28 1980-04-28 Picture processing method

Publications (1)

Publication Number Publication Date
JPS56153883A true JPS56153883A (en) 1981-11-28

Family

ID=13035555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5672880A Pending JPS56153883A (en) 1980-04-28 1980-04-28 Picture processing method

Country Status (1)

Country Link
JP (1) JPS56153883A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217607A2 (en) * 1985-10-01 1987-04-08 Seiko Instruments Inc. Threshold value setting circuit for a video signal interface and to recording apparatus provided therewith

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0217607A2 (en) * 1985-10-01 1987-04-08 Seiko Instruments Inc. Threshold value setting circuit for a video signal interface and to recording apparatus provided therewith
EP0217607A3 (en) * 1985-10-01 1988-09-21 Seiko Instruments Inc. Threshold value setting circuit for a video signal interface and to recording apparatus provided therewith

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