JPS64865A - Picture signal correcting circuit - Google Patents

Picture signal correcting circuit

Info

Publication number
JPS64865A
JPS64865A JP62155968A JP15596887A JPS64865A JP S64865 A JPS64865 A JP S64865A JP 62155968 A JP62155968 A JP 62155968A JP 15596887 A JP15596887 A JP 15596887A JP S64865 A JPS64865 A JP S64865A
Authority
JP
Japan
Prior art keywords
image sensor
gradation
data
picture signal
converting circuit
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.)
Pending
Application number
JP62155968A
Other languages
Japanese (ja)
Other versions
JPH01865A (en
Inventor
Akio Suzuki
Norio Kanemitsu
Yoshio Tabata
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62155968A priority Critical patent/JPS64865A/en
Publication of JPH01865A publication Critical patent/JPH01865A/en
Publication of JPS64865A publication Critical patent/JPS64865A/en
Pending legal-status Critical Current

Links

Landscapes

  • Facsimile Image Signal Circuits (AREA)
  • Image Input (AREA)

Abstract

PURPOSE: To correct the gradation characteristic of each image sensor to obtain a uniform picture signal by providing a gradation converting circuit where data obtained by correcting gradation characteristics of respective image sensor elements is stored.
CONSTITUTION: An A/D converter 11 to which reference levels of white level and black level are given from a reference level holding and supply circuit 12 converts the analog video signal from each image sensor element to digital data. A multiplexer 13 receives the output of each A/D converter 11 and outputs data of a channel corresponding to a switching signal and supplies this data to a gradation converting circuit 14. The converting circuit 14 corrects the gradation characteristic of each image sensor element in accordance with preliminarily stored correction data for every channel. Thus, the gradation characteristic of each image sensor is corrected to obtain a uniform picture signal.
COPYRIGHT: (C)1989,JPO&Japio
JP62155968A 1987-06-23 1987-06-23 Picture signal correcting circuit Pending JPS64865A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62155968A JPS64865A (en) 1987-06-23 1987-06-23 Picture signal correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62155968A JPS64865A (en) 1987-06-23 1987-06-23 Picture signal correcting circuit

Publications (2)

Publication Number Publication Date
JPH01865A JPH01865A (en) 1989-01-05
JPS64865A true JPS64865A (en) 1989-01-05

Family

ID=15617475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62155968A Pending JPS64865A (en) 1987-06-23 1987-06-23 Picture signal correcting circuit

Country Status (1)

Country Link
JP (1) JPS64865A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0476774U (en) * 1990-11-19 1992-07-03
WO2002001850A1 (en) * 2000-06-29 2002-01-03 Matsushita Electric Industrial Co. Ltd. Gamma correction device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0476774U (en) * 1990-11-19 1992-07-03
WO2002001850A1 (en) * 2000-06-29 2002-01-03 Matsushita Electric Industrial Co. Ltd. Gamma correction device

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