JPH0423467B2 - - Google Patents

Info

Publication number
JPH0423467B2
JPH0423467B2 JP56132452A JP13245281A JPH0423467B2 JP H0423467 B2 JPH0423467 B2 JP H0423467B2 JP 56132452 A JP56132452 A JP 56132452A JP 13245281 A JP13245281 A JP 13245281A JP H0423467 B2 JPH0423467 B2 JP H0423467B2
Authority
JP
Japan
Prior art keywords
read
image
maximum value
image signal
scanning element
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.)
Expired - Lifetime
Application number
JP56132452A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5834676A (ja
Inventor
Yoshiaki Kamimoto
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 JP56132452A priority Critical patent/JPS5834676A/ja
Publication of JPS5834676A publication Critical patent/JPS5834676A/ja
Publication of JPH0423467B2 publication Critical patent/JPH0423467B2/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)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)
JP56132452A 1981-08-24 1981-08-24 白レベル基準検出回路 Granted JPS5834676A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56132452A JPS5834676A (ja) 1981-08-24 1981-08-24 白レベル基準検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56132452A JPS5834676A (ja) 1981-08-24 1981-08-24 白レベル基準検出回路

Publications (2)

Publication Number Publication Date
JPS5834676A JPS5834676A (ja) 1983-03-01
JPH0423467B2 true JPH0423467B2 (enrdf_load_stackoverflow) 1992-04-22

Family

ID=15081679

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56132452A Granted JPS5834676A (ja) 1981-08-24 1981-08-24 白レベル基準検出回路

Country Status (1)

Country Link
JP (1) JPS5834676A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2918041B2 (ja) * 1989-03-14 1999-07-12 株式会社リコー 画像読取り装置
JPH04296981A (ja) * 1991-03-26 1992-10-21 Sumitomo Electric Ind Ltd 光学的画像読取装置の白レベル検出回路

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5322310A (en) * 1976-08-13 1978-03-01 Toshiba Corp Picture read system
JPS5480024A (en) * 1977-12-08 1979-06-26 Ricoh Co Ltd Shading correction system

Also Published As

Publication number Publication date
JPS5834676A (ja) 1983-03-01

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