JPS6339140B2 - - Google Patents

Info

Publication number
JPS6339140B2
JPS6339140B2 JP55060565A JP6056580A JPS6339140B2 JP S6339140 B2 JPS6339140 B2 JP S6339140B2 JP 55060565 A JP55060565 A JP 55060565A JP 6056580 A JP6056580 A JP 6056580A JP S6339140 B2 JPS6339140 B2 JP S6339140B2
Authority
JP
Japan
Prior art keywords
signal
analog
voltage
peak value
digital
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
JP55060565A
Other languages
English (en)
Japanese (ja)
Other versions
JPS56157575A (en
Inventor
Mitsuharu Tadauchi
Kyohiko Tanno
Taizo Nakano
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP6056580A priority Critical patent/JPS56157575A/ja
Priority to US06/260,090 priority patent/US4420742A/en
Priority to EP81103441A priority patent/EP0039899B1/fr
Priority to DE8181103441T priority patent/DE3168865D1/de
Publication of JPS56157575A publication Critical patent/JPS56157575A/ja
Publication of JPS6339140B2 publication Critical patent/JPS6339140B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G06V10/28—Quantising the image, e.g. histogram thresholding for discrimination between background and foreground patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Image Input (AREA)
  • Facsimile Image Signal Circuits (AREA)
JP6056580A 1980-05-09 1980-05-09 Signal procession device Granted JPS56157575A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6056580A JPS56157575A (en) 1980-05-09 1980-05-09 Signal procession device
US06/260,090 US4420742A (en) 1980-05-09 1981-05-04 Scan signal processing system
EP81103441A EP0039899B1 (fr) 1980-05-09 1981-05-06 Système de traitement d'un signal de balayage
DE8181103441T DE3168865D1 (en) 1980-05-09 1981-05-06 Scan signal processing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6056580A JPS56157575A (en) 1980-05-09 1980-05-09 Signal procession device

Publications (2)

Publication Number Publication Date
JPS56157575A JPS56157575A (en) 1981-12-04
JPS6339140B2 true JPS6339140B2 (fr) 1988-08-03

Family

ID=13145907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6056580A Granted JPS56157575A (en) 1980-05-09 1980-05-09 Signal procession device

Country Status (1)

Country Link
JP (1) JPS56157575A (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58127469A (ja) * 1982-01-25 1983-07-29 Matsushita Graphic Commun Syst Inc 自動コントラスト補正回路
JPS6096076A (ja) * 1983-10-31 1985-05-29 Matsushita Electric Ind Co Ltd シエ−デイング歪み補正装置
JPH07283944A (ja) * 1994-04-07 1995-10-27 Fujitsu Ltd 画像読み取り装置における白レベル情報補正装置及び白レベル情報補正装置付き画像読み取り装置

Also Published As

Publication number Publication date
JPS56157575A (en) 1981-12-04

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