+

WO1998018263A3 - Sharpness improvement - Google Patents

Sharpness improvement Download PDF

Info

Publication number
WO1998018263A3
WO1998018263A3 PCT/IB1997/001159 IB9701159W WO9818263A3 WO 1998018263 A3 WO1998018263 A3 WO 1998018263A3 IB 9701159 W IB9701159 W IB 9701159W WO 9818263 A3 WO9818263 A3 WO 9818263A3
Authority
WO
WIPO (PCT)
Prior art keywords
sharpness
sharpness improvement
ctrl
control signal
image signal
Prior art date
Application number
PCT/IB1997/001159
Other languages
French (fr)
Other versions
WO1998018263A2 (en
Inventor
Michel Wouter Nieuwenhuizen
Van Der Leendert Albert Broeke
Van Maarten Wilhelmus Dommelen
Original Assignee
Philips Electronics Nv
Philips Norden Ab
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 Philips Electronics Nv, Philips Norden Ab filed Critical Philips Electronics Nv
Priority to EP97940279A priority Critical patent/EP0868817A2/en
Priority to JP10519146A priority patent/JP2000502548A/en
Priority to KR1019980704844A priority patent/KR19990076726A/en
Publication of WO1998018263A2 publication Critical patent/WO1998018263A2/en
Publication of WO1998018263A3 publication Critical patent/WO1998018263A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Image Communication Systems (AREA)

Abstract

In a sharpness-improving method, the presence of predetermined colors (R, M) in an image signal (y-in, u-in, v-in) is determined (7) to obtain a control signal (CTRL), and a sharpness of the image signal (y-in, u-in, v-in) is enhanced (1-5) in dependence upon the control signal (CTRL).
PCT/IB1997/001159 1996-10-21 1997-09-26 Sharpness improvement WO1998018263A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP97940279A EP0868817A2 (en) 1996-10-21 1997-09-26 Sharpness improvement
JP10519146A JP2000502548A (en) 1996-10-21 1997-09-26 Sharpening
KR1019980704844A KR19990076726A (en) 1996-10-21 1997-09-26 Clarity Improvement Methods and Circuits

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP96202924.5 1996-10-21
EP96202924 1996-10-21
EP97200705.8 1997-03-10
EP97200705 1997-03-10

Publications (2)

Publication Number Publication Date
WO1998018263A2 WO1998018263A2 (en) 1998-04-30
WO1998018263A3 true WO1998018263A3 (en) 1998-06-18

Family

ID=26143264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1997/001159 WO1998018263A2 (en) 1996-10-21 1997-09-26 Sharpness improvement

Country Status (5)

Country Link
EP (1) EP0868817A2 (en)
JP (1) JP2000502548A (en)
KR (1) KR19990076726A (en)
MY (1) MY130988A (en)
WO (1) WO1998018263A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100780724B1 (en) * 2001-11-14 2007-11-30 주식회사 엘지이아이 Digital TV Sharpness Enhancement Device
CN100508625C (en) * 2004-11-01 2009-07-01 晨星半导体股份有限公司 image contrast enhancement device and method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0461615A2 (en) * 1990-06-12 1991-12-18 Matsushita Electric Industrial Co., Ltd. Color image pickup apparatus
US5267028A (en) * 1988-08-26 1993-11-30 Canon Kabushiki Kaisha Solid state image pickup apparatus having luminance control
EP0621732A2 (en) * 1993-04-19 1994-10-26 Mitsubishi Denki Kabushiki Kaisha Image quality correction circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5267028A (en) * 1988-08-26 1993-11-30 Canon Kabushiki Kaisha Solid state image pickup apparatus having luminance control
US5563657A (en) * 1988-08-26 1996-10-08 Canon Kabushiki Kaisha Solid state image pickup apparatus having improved luminance control
EP0461615A2 (en) * 1990-06-12 1991-12-18 Matsushita Electric Industrial Co., Ltd. Color image pickup apparatus
EP0621732A2 (en) * 1993-04-19 1994-10-26 Mitsubishi Denki Kabushiki Kaisha Image quality correction circuit

Also Published As

Publication number Publication date
KR19990076726A (en) 1999-10-15
JP2000502548A (en) 2000-02-29
MY130988A (en) 2007-07-31
WO1998018263A2 (en) 1998-04-30
EP0868817A2 (en) 1998-10-07

Similar Documents

Publication Publication Date Title
AU5170793A (en) Improved membrane computer keyboard and method
AU5200493A (en) Cardiovascular flow enhancer and method of operation
EP0830019A3 (en) Apparatus for controlling the display of data, apparatus for transmitting of display control information and an apparatus for editing of the said display control information
AU4783585A (en) 2,3-dithydroindenylpropenyl and 5,6,7,8- tetrahydroindenyl isoxazole derivatives
AU4085497A (en) 5-substituted and 5,5-disubstituted-3,4-dihydroxy-2(5H) -furanones and methods of use therefor
AU5505794A (en) Alkali-treated bagasse, and its preparation and uses
EP0668392A3 (en) Improved roofing membrane and method of making same.
AU4736097A (en) Variable speed select key and method
AU6871394A (en) Sailboat
AU6575796A (en) Mainsail reefing system
CA2113947A1 (en) Television Receiver
AU1473997A (en) Emulsifier from yeast
AU1077195A (en) Propeller shaft
AU7766991A (en) Printing inks, and methods of printing
AU6936794A (en) Irrigation membrane material and irrigation method
WO1998018263A3 (en) Sharpness improvement
AU7291987A (en) Mainsail reefing and furling device and method
AU2636495A (en) Structures with field responsive permeation control
AU8711091A (en) Video character recognition
AU8094987A (en) Fore and aft sails
AU8918791A (en) System and method of selecting the reproducible colors in a discrete reproduction system
AU1965497A (en) Cardiotrophin and uses therefor
AU2382092A (en) Sulpinine, secopenitrem b and aflatrem b antiinsectan metabolites
AU4043689A (en) Wide-band amplifier
AU6569994A (en) Rollable and reefable sail

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): JP KR

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

WWE Wipo information: entry into national phase

Ref document number: 1997940279

Country of ref document: EP

ENP Entry into the national phase

Ref country code: JP

Ref document number: 1998 519146

Kind code of ref document: A

Format of ref document f/p: F

WWE Wipo information: entry into national phase

Ref document number: 1019980704844

Country of ref document: KR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1997940279

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019980704844

Country of ref document: KR

WWW Wipo information: withdrawn in national office

Ref document number: 1997940279

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1019980704844

Country of ref document: KR

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载