WO2002039752A3 - High quality color key extraction apparatus - Google Patents

High quality color key extraction apparatus Download PDF

Info

Publication number
WO2002039752A3
WO2002039752A3 PCT/EP2001/013019 EP0113019W WO0239752A3 WO 2002039752 A3 WO2002039752 A3 WO 2002039752A3 EP 0113019 W EP0113019 W EP 0113019W WO 0239752 A3 WO0239752 A3 WO 0239752A3
Authority
WO
WIPO (PCT)
Prior art keywords
color
predefined
key
incoming pixel
extraction apparatus
Prior art date
Application number
PCT/EP2001/013019
Other languages
French (fr)
Other versions
WO2002039752A2 (en
Inventor
Jens Rennert
Ralph Escherich
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Priority to JP2002542142A priority Critical patent/JP2004514338A/en
Priority to KR1020027008841A priority patent/KR20020067608A/en
Publication of WO2002039752A2 publication Critical patent/WO2002039752A2/en
Publication of WO2002039752A3 publication Critical patent/WO2002039752A3/en

Links

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
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • H04N9/75—Chroma key
    • 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
    • H04N9/74—Circuits for processing colour signals for obtaining special effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Endoscopes (AREA)

Abstract

The present invention provides a very hardware efficient and flexible way of performing color keying and color components evaluation operations. It also provides a way to significantly limit the visibility of artifacts introduced by filtering on images containing key color information. According to the present invention, there is provided a color key extraction apparatus for determining whether an incoming pixel having a plurality of color components matches a predefined key color. The apparatus comprises a plurality of evaluation circuits each configured to receive and evaluate one of the color components of the incoming pixel against a predefined color component intensity range and output a comparison signal; and a matching circuit, operably coupled to each of the evaluation circuits, that is configured to determine whether a combination of the comparison signals meets a predefined condition and output a match signal if the condition is met, whereby the incoming pixel matches the predefined key color.
PCT/EP2001/013019 2000-11-10 2001-11-06 High quality color key extraction apparatus WO2002039752A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002542142A JP2004514338A (en) 2000-11-10 2001-11-06 High quality color key extraction device
KR1020027008841A KR20020067608A (en) 2000-11-10 2001-11-06 High quality color key extraction apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70999800A 2000-11-10 2000-11-10
US09/709,998 2000-11-10

Publications (2)

Publication Number Publication Date
WO2002039752A2 WO2002039752A2 (en) 2002-05-16
WO2002039752A3 true WO2002039752A3 (en) 2002-10-10

Family

ID=24852184

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/013019 WO2002039752A2 (en) 2000-11-10 2001-11-06 High quality color key extraction apparatus

Country Status (4)

Country Link
JP (1) JP2004514338A (en)
KR (1) KR20020067608A (en)
TW (1) TW535419B (en)
WO (1) WO2002039752A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2410804A (en) * 2004-02-07 2005-08-10 Accuscene Corp Ltd Image processor with light intensity modifying means
US7456904B2 (en) * 2005-09-22 2008-11-25 Pelco, Inc. Method and apparatus for superimposing characters on video

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06295339A (en) * 1992-06-10 1994-10-21 Seiko Epson Corp Video processor and computer system
US5398075A (en) * 1993-11-19 1995-03-14 Intel Corporation Analog chroma keying on color data
US6023302A (en) * 1996-03-07 2000-02-08 Powertv, Inc. Blending of video images in a home communications terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06295339A (en) * 1992-06-10 1994-10-21 Seiko Epson Corp Video processor and computer system
US5398075A (en) * 1993-11-19 1995-03-14 Intel Corporation Analog chroma keying on color data
US6023302A (en) * 1996-03-07 2000-02-08 Powertv, Inc. Blending of video images in a home communications terminal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 01 28 February 1995 (1995-02-28) *

Also Published As

Publication number Publication date
KR20020067608A (en) 2002-08-22
WO2002039752A2 (en) 2002-05-16
TW535419B (en) 2003-06-01
JP2004514338A (en) 2004-05-13

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