JPH057913B2 - - Google Patents

Info

Publication number
JPH057913B2
JPH057913B2 JP58048997A JP4899783A JPH057913B2 JP H057913 B2 JPH057913 B2 JP H057913B2 JP 58048997 A JP58048997 A JP 58048997A JP 4899783 A JP4899783 A JP 4899783A JP H057913 B2 JPH057913 B2 JP H057913B2
Authority
JP
Japan
Prior art keywords
shading distortion
document
reading
original
data
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
JP58048997A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59175279A (ja
Inventor
Shigeru Koizumi
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP58048997A priority Critical patent/JPS59175279A/ja
Publication of JPS59175279A publication Critical patent/JPS59175279A/ja
Priority to US06/873,066 priority patent/US4717963A/en
Publication of JPH057913B2 publication Critical patent/JPH057913B2/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
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP58048997A 1983-03-25 1983-03-25 シエ−デイング歪補正方法 Granted JPS59175279A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP58048997A JPS59175279A (ja) 1983-03-25 1983-03-25 シエ−デイング歪補正方法
US06/873,066 US4717963A (en) 1983-03-25 1986-06-04 Image information read apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58048997A JPS59175279A (ja) 1983-03-25 1983-03-25 シエ−デイング歪補正方法

Publications (2)

Publication Number Publication Date
JPS59175279A JPS59175279A (ja) 1984-10-04
JPH057913B2 true JPH057913B2 (enrdf_load_stackoverflow) 1993-01-29

Family

ID=12818840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58048997A Granted JPS59175279A (ja) 1983-03-25 1983-03-25 シエ−デイング歪補正方法

Country Status (1)

Country Link
JP (1) JPS59175279A (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60123167A (ja) * 1983-12-07 1985-07-01 Canon Inc シェーディング歪補正方法
JPS6277763A (ja) * 1985-09-30 1987-04-09 Nec Corp 画像読取装置
JPH01204568A (ja) * 1988-02-10 1989-08-17 Mitsubishi Electric Corp スライスレベル自動調整読取信号処理装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5613868A (en) * 1979-07-13 1981-02-10 Canon Inc Original reading device
JPS55156475A (en) * 1979-05-25 1980-12-05 Hitachi Ltd Binary-coder for analog signal
JPS5735476A (en) * 1980-08-11 1982-02-26 Toshiba Corp Original reading section
JPS5761377A (en) * 1980-09-30 1982-04-13 Nec Corp Image reader
JPS57145472A (en) * 1981-03-05 1982-09-08 Canon Inc Original reader

Also Published As

Publication number Publication date
JPS59175279A (ja) 1984-10-04

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