WO1997024882A3 - Chrominance interpolation - Google Patents

Chrominance interpolation Download PDF

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Publication number
WO1997024882A3
WO1997024882A3 PCT/IB1996/001364 IB9601364W WO9724882A3 WO 1997024882 A3 WO1997024882 A3 WO 1997024882A3 IB 9601364 W IB9601364 W IB 9601364W WO 9724882 A3 WO9724882 A3 WO 9724882A3
Authority
WO
WIPO (PCT)
Prior art keywords
chrominance
existing
sample
samples
interpolated
Prior art date
Application number
PCT/IB1996/001364
Other languages
French (fr)
Other versions
WO1997024882A2 (en
Inventor
Hendrik Dijkstra
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
Publication of WO1997024882A2 publication Critical patent/WO1997024882A2/en
Publication of WO1997024882A3 publication Critical patent/WO1997024882A3/en

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Classifications

    • 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 method of chrominance interpolation to obtain at least one interpolated chrominance sample (c2, c3, c4) between first (c1) and second (c5) existing chrominance samples, a corresponding relative luminance step is determined for a chrominance sample (c2, c3, c4) to be interpolated, the first (c1) and second (c5) existing chrominance samples are subtracted to obtain a chrominance step, and the chrominance samples (c2, c3, c4) to be interpoled are calculated by adding to the first existing chrominance sample (c1), a product of the chrominance step and the corresponding relative luminance step. The method is advantageously used in multimedia terminals.
PCT/IB1996/001364 1995-12-27 1996-12-05 Chrominance interpolation WO1997024882A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP95203646 1995-12-27
EP95203646.5 1995-12-27

Publications (2)

Publication Number Publication Date
WO1997024882A2 WO1997024882A2 (en) 1997-07-10
WO1997024882A3 true WO1997024882A3 (en) 1997-09-04

Family

ID=8221020

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1996/001364 WO1997024882A2 (en) 1995-12-27 1996-12-05 Chrominance interpolation

Country Status (1)

Country Link
WO (1) WO1997024882A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2312350B (en) * 1996-04-17 2000-08-30 Quantel Ltd A signal processing system
FR2801463B1 (en) * 1999-11-23 2002-04-12 St Microelectronics Sa METHOD AND SYSTEM FOR PROCESSING DIGITAL IMAGES
US6600517B1 (en) 2000-03-07 2003-07-29 Koninklijke Philips Electronics N.V. System and method for improving the sharpness of a video image

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001965A2 (en) * 1984-09-10 1986-03-27 Eastman Kodak Company Signal rpocessing method and apparatus for sampled color image signal
EP0469892A2 (en) * 1990-08-01 1992-02-05 Matsushita Electric Industrial Co., Ltd. Filter device for decimation and interpolation of chrominance components of a video signal
EP0546469A1 (en) * 1991-12-13 1993-06-16 THOMSON multimedia Method and apparatus for vertical interpolation
US5382976A (en) * 1993-06-30 1995-01-17 Eastman Kodak Company Apparatus and method for adaptively interpolating a full color image utilizing luminance gradients

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986001965A2 (en) * 1984-09-10 1986-03-27 Eastman Kodak Company Signal rpocessing method and apparatus for sampled color image signal
EP0469892A2 (en) * 1990-08-01 1992-02-05 Matsushita Electric Industrial Co., Ltd. Filter device for decimation and interpolation of chrominance components of a video signal
EP0546469A1 (en) * 1991-12-13 1993-06-16 THOMSON multimedia Method and apparatus for vertical interpolation
US5382976A (en) * 1993-06-30 1995-01-17 Eastman Kodak Company Apparatus and method for adaptively interpolating a full color image utilizing luminance gradients

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, Vol. 10, No. 50, E-384; & JP,A,60 201 790 (KONISHIROKU SHASHIN KOGYO K.K.), 12 October 1985. *
PATENT ABSTRACTS OF JAPAN, Vol. 11, No. 187, E-516; & JP,A,62 016 696 (FUJI PHOTO FILM CO LTD), 24 January 1987. *
PATENT ABSTRACTS OF JAPAN, Vol. 9, No. 220, E-341; & JP,A,60 080 392 (NIPPON HOSO KYOKAI), 8 May 1985. *

Also Published As

Publication number Publication date
WO1997024882A2 (en) 1997-07-10

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