JPS6451889A - Video signal processor - Google Patents

Video signal processor

Info

Publication number
JPS6451889A
JPS6451889A JP62209666A JP20966687A JPS6451889A JP S6451889 A JPS6451889 A JP S6451889A JP 62209666 A JP62209666 A JP 62209666A JP 20966687 A JP20966687 A JP 20966687A JP S6451889 A JPS6451889 A JP S6451889A
Authority
JP
Japan
Prior art keywords
rgb
video signal
look
address
peak
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.)
Granted
Application number
JP62209666A
Other languages
Japanese (ja)
Other versions
JPH0828881B2 (en
Inventor
Haruo Yamashita
Yasuki Matsumoto
Kin Nishikawa
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 Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62209666A priority Critical patent/JPH0828881B2/en
Publication of JPS6451889A publication Critical patent/JPS6451889A/en
Publication of JPH0828881B2 publication Critical patent/JPH0828881B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Color Image Communication Systems (AREA)
  • Image Processing (AREA)

Abstract

PURPOSE:To attain a gain control for enlarging the dynamic range only of a brightness correctly without changing a hue and a chroma by applying an automatic gain control operation to a converting table. CONSTITUTION:Before the start to fetch RGB video signals f-h consisting of to still picture, the peak of the brightness component of the RGB video signal is obtained from the RGB video signal by a luminance signal generating means 6 and a peak detector 4. At the time of inputting at level corresponding to the peak of the brightness component of the RGB video signal, a look up table set in a RAM 12 is compressed to an address direction so as to obtain a maximum output by an address compressing means and video data is applied to a newly set look up table as an address to obtain the converted data. Then, since the same look up table is used for any of the RGB, a gain between the RGB is the same to have no break in a color balance.
JP62209666A 1987-08-24 1987-08-24 Video signal processing device Expired - Fee Related JPH0828881B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62209666A JPH0828881B2 (en) 1987-08-24 1987-08-24 Video signal processing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62209666A JPH0828881B2 (en) 1987-08-24 1987-08-24 Video signal processing device

Publications (2)

Publication Number Publication Date
JPS6451889A true JPS6451889A (en) 1989-02-28
JPH0828881B2 JPH0828881B2 (en) 1996-03-21

Family

ID=16576595

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62209666A Expired - Fee Related JPH0828881B2 (en) 1987-08-24 1987-08-24 Video signal processing device

Country Status (1)

Country Link
JP (1) JPH0828881B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5583656A (en) * 1992-12-31 1996-12-10 Eastman Kodak Company Methods and apparatus for attaching compressed look-up table (LUT) representations of N to M-dimensional transforms to image data and for processing image data utilizing the attached compressed LUTs
KR100537883B1 (en) * 1998-03-12 2006-02-28 삼성전자주식회사 Liquid crystal display device having automatic gain correction device and control method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6361591A (en) * 1986-09-02 1988-03-17 Fuji Photo Film Co Ltd Method and device for image processing

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6361591A (en) * 1986-09-02 1988-03-17 Fuji Photo Film Co Ltd Method and device for image processing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5583656A (en) * 1992-12-31 1996-12-10 Eastman Kodak Company Methods and apparatus for attaching compressed look-up table (LUT) representations of N to M-dimensional transforms to image data and for processing image data utilizing the attached compressed LUTs
KR100537883B1 (en) * 1998-03-12 2006-02-28 삼성전자주식회사 Liquid crystal display device having automatic gain correction device and control method thereof

Also Published As

Publication number Publication date
JPH0828881B2 (en) 1996-03-21

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees