JPS6340072B2 - - Google Patents

Info

Publication number
JPS6340072B2
JPS6340072B2 JP57010684A JP1068482A JPS6340072B2 JP S6340072 B2 JPS6340072 B2 JP S6340072B2 JP 57010684 A JP57010684 A JP 57010684A JP 1068482 A JP1068482 A JP 1068482A JP S6340072 B2 JPS6340072 B2 JP S6340072B2
Authority
JP
Japan
Prior art keywords
line
image signal
peak value
output
amplification degree
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
Application number
JP57010684A
Other languages
English (en)
Japanese (ja)
Other versions
JPS58127469A (ja
Inventor
Hideyuki Hanaoka
Mitsuo Togashi
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.)
Panasonic System Solutions Japan Co Ltd
Original Assignee
Matsushita Graphic Communication Systems 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 Matsushita Graphic Communication Systems Inc filed Critical Matsushita Graphic Communication Systems Inc
Priority to JP1068482A priority Critical patent/JPS58127469A/ja
Publication of JPS58127469A publication Critical patent/JPS58127469A/ja
Publication of JPS6340072B2 publication Critical patent/JPS6340072B2/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)
  • Facsimile Image Signal Circuits (AREA)
JP1068482A 1982-01-25 1982-01-25 自動コントラスト補正回路 Granted JPS58127469A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1068482A JPS58127469A (ja) 1982-01-25 1982-01-25 自動コントラスト補正回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1068482A JPS58127469A (ja) 1982-01-25 1982-01-25 自動コントラスト補正回路

Publications (2)

Publication Number Publication Date
JPS58127469A JPS58127469A (ja) 1983-07-29
JPS6340072B2 true JPS6340072B2 (enrdf_load_stackoverflow) 1988-08-09

Family

ID=11757085

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1068482A Granted JPS58127469A (ja) 1982-01-25 1982-01-25 自動コントラスト補正回路

Country Status (1)

Country Link
JP (1) JPS58127469A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63208367A (ja) * 1987-02-24 1988-08-29 Matsushita Graphic Commun Syst Inc 画像信号補正装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4133008A (en) * 1977-03-14 1979-01-02 Rapicom Inc. Automatic illumination compensation circuit
JPS565762A (en) * 1979-06-28 1981-01-21 Uchida Yoko:Kk Automatic adjusting circuit for background density in stencil paper making machine
JPS56111375A (en) * 1980-02-07 1981-09-03 Ricoh Co Ltd Picture signal amplifying circuit
JPS56157577A (en) * 1980-05-09 1981-12-04 Hitachi Ltd Signal procession device
JPS56157575A (en) * 1980-05-09 1981-12-04 Hitachi Ltd Signal procession device

Also Published As

Publication number Publication date
JPS58127469A (ja) 1983-07-29

Similar Documents

Publication Publication Date Title
KR910002980B1 (ko) 이득 제어 장치
US20050007461A1 (en) Correction system and method of analog front end
US4841376A (en) Shading correcting method enabling prevention of effect of noise and apparatus therefor
JPS5925267B2 (ja) 光学文字読取装置
JPS6340072B2 (enrdf_load_stackoverflow)
JPS5814671A (ja) 画信号処理装置
JPS6180967A (ja) シエ−デイング補正方式
KR930011612A (ko) 화상 조정장치
JPS58134370A (ja) アナログ走査信号を２進方形信号に変換する方法および装置
JPS6260874B2 (enrdf_load_stackoverflow)
KR100213473B1 (ko) 화상독취장치 및 제어방법
JPS6149871B2 (enrdf_load_stackoverflow)
KR100394498B1 (ko) 영상신호의윤곽보정회로
JP3049652B2 (ja) デジタルスキャナの感度調整装置
JPH04358474A (ja) 原稿読取装置および原稿読取方法
JPS6236425B2 (enrdf_load_stackoverflow)
JP2740366B2 (ja) 画像信号のコントラスト強調方法およびこれを用いた画像信号の２値化装置
JPH05122519A (ja) ピークホールド回路
JPS6338150B2 (enrdf_load_stackoverflow)
JPS6016067A (ja) 自動利得制御増幅装置
JPH01228267A (ja) 画像読取装置
JPH0213509B2 (enrdf_load_stackoverflow)
JPH0213508B2 (enrdf_load_stackoverflow)
JPH05102853A (ja) Ａ／ｄ変換回路
JPH04330862A (ja) 画像読取装置