JPS59171253A - 画像読取装置 - Google Patents

画像読取装置

Info

Publication number
JPS59171253A
JPS59171253A JP58045176A JP4517683A JPS59171253A JP S59171253 A JPS59171253 A JP S59171253A JP 58045176 A JP58045176 A JP 58045176A JP 4517683 A JP4517683 A JP 4517683A JP S59171253 A JPS59171253 A JP S59171253A
Authority
JP
Japan
Prior art keywords
level
output
read
pixel
reading
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
JP58045176A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0580860B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html
Inventor
Mitsushi Sawada
沢田　満視
Shinobu Fukuoka
福岡　忍
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 JP58045176A priority Critical patent/JPS59171253A/ja
Publication of JPS59171253A publication Critical patent/JPS59171253A/ja
Publication of JPH0580860B2 publication Critical patent/JPH0580860B2/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
    • H04N1/409—Edge or detail enhancement; Noise or error suppression

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP58045176A 1983-03-17 1983-03-17 画像読取装置 Granted JPS59171253A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58045176A JPS59171253A (ja) 1983-03-17 1983-03-17 画像読取装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58045176A JPS59171253A (ja) 1983-03-17 1983-03-17 画像読取装置

Publications (2)

Publication Number Publication Date
JPS59171253A true JPS59171253A (ja) 1984-09-27
JPH0580860B2 JPH0580860B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-11-10

Family

ID=12711956

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58045176A Granted JPS59171253A (ja) 1983-03-17 1983-03-17 画像読取装置

Country Status (1)

Country Link
JP (1) JPS59171253A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61230570A (ja) * 1985-04-05 1986-10-14 Ricoh Co Ltd 画像読取装置
JPS6393262A (ja) * 1986-10-07 1988-04-23 Canon Inc 画像処理装置
JPH02228180A (ja) * 1989-03-01 1990-09-11 Hitachi Denshi Ltd ビデオプロジェクタ装置
JPH07264400A (ja) * 1994-03-18 1995-10-13 Nec Corp シェーディング補正回路

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5387123A (en) * 1977-01-11 1978-08-01 Canon Inc Information processing unit
JPS57206171A (en) * 1981-06-15 1982-12-17 Ricoh Co Ltd Shading compensating device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5387123A (en) * 1977-01-11 1978-08-01 Canon Inc Information processing unit
JPS57206171A (en) * 1981-06-15 1982-12-17 Ricoh Co Ltd Shading compensating device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61230570A (ja) * 1985-04-05 1986-10-14 Ricoh Co Ltd 画像読取装置
JPS6393262A (ja) * 1986-10-07 1988-04-23 Canon Inc 画像処理装置
JPH02228180A (ja) * 1989-03-01 1990-09-11 Hitachi Denshi Ltd ビデオプロジェクタ装置
JPH07264400A (ja) * 1994-03-18 1995-10-13 Nec Corp シェーディング補正回路

Also Published As

Publication number Publication date
JPH0580860B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-11-10

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