CA2090696A1 - Method and apparatus for direction related interpolation - Google Patents

Method and apparatus for direction related interpolation

Info

Publication number
CA2090696A1
CA2090696A1 CA002090696A CA2090696A CA2090696A1 CA 2090696 A1 CA2090696 A1 CA 2090696A1 CA 002090696 A CA002090696 A CA 002090696A CA 2090696 A CA2090696 A CA 2090696A CA 2090696 A1 CA2090696 A1 CA 2090696A1
Authority
CA
Canada
Prior art keywords
averaging
adjacent lines
adjacent
vertical
diag3
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
CA002090696A
Other languages
French (fr)
Other versions
CA2090696C (en
Inventor
Werner Boie
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.)
Technicolor SA
Original Assignee
Thomson Consumer Electronics SA
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 Thomson Consumer Electronics SA filed Critical Thomson Consumer Electronics SA
Publication of CA2090696A1 publication Critical patent/CA2090696A1/en
Application granted granted Critical
Publication of CA2090696C publication Critical patent/CA2090696C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/012—Conversion between an interlaced and a progressive signal

Abstract

For Proscan conversion adjacent fields cannot be used to inter-polate moving objects because motion blur will be introduced then. The most simple solution is to insert the average of the two adjacent lines for each missing line. A technique superior to vertical averaging represents the DIAG3 algorithm, where ac-cording to the found minimum gradient the orientation of the in-terpolation filter is chosen. But in case of high diagonal frequencies interpolation errors will occur.
Therefore it is tested if the reconstructed pixel value exceeds or falls below the pixel values in the two adjacent lines of the input signal. If this happens, instead of one of the detected diagonal directions the vertical direction is taken, i.e. a ver-tical averaging is carried out.
CA002090696A 1992-03-20 1993-03-01 Method and apparatus for direction related interpolation Expired - Lifetime CA2090696C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP92400762.8 1992-03-20
EP92400762 1992-03-20

Publications (2)

Publication Number Publication Date
CA2090696A1 true CA2090696A1 (en) 1993-09-21
CA2090696C CA2090696C (en) 2001-08-21

Family

ID=8211629

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002090696A Expired - Lifetime CA2090696C (en) 1992-03-20 1993-03-01 Method and apparatus for direction related interpolation

Country Status (3)

Country Link
US (1) US5481311A (en)
CA (1) CA2090696C (en)
DE (1) DE69311605T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69230548T2 (en) * 1991-08-23 2000-06-15 Mitsubishi Electric Corp Pixel interpolation circuit and applications
JP3734362B2 (en) * 1998-03-09 2006-01-11 パイオニア株式会社 Interpolation method
US6281875B1 (en) * 1998-04-29 2001-08-28 Canon Kabushiki Kaisha Gradient-based pixel interpolation
US6718074B1 (en) 2000-06-02 2004-04-06 Cognex Corporation Method and apparatus for inspection for under-resolved features in digital images
KR100975786B1 (en) * 2002-03-27 2010-08-16 톰슨 라이센싱 Upconversion with noise constrained diagonal enhancement
AU2003223298A1 (en) * 2002-03-27 2003-10-13 Thomson Licensing S.A. Upconversion with improved diagonal enhancement
JP3810404B2 (en) * 2003-11-10 2006-08-16 三菱電機株式会社 Pixel interpolation circuit and pixel interpolation method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831435A (en) * 1986-11-29 1989-05-16 Samsung Electronics Co., Ltd. Adaptive scanning line converting circuit for a television receiver
JPH02131689A (en) * 1988-07-22 1990-05-21 Toshiba Corp In-field interpolation circuit
JPH02177683A (en) * 1988-09-29 1990-07-10 Toshiba Corp Picture signal correlation decision and interpolation data preparing device
US4941045A (en) * 1988-10-11 1990-07-10 Scientific-Atlanta, Inc. Method and apparatus for improving vertical definition of a television signal by scan conversion
US5093721A (en) * 1990-07-10 1992-03-03 Zenith Electronics Corporation Line interpolator with preservation of diagonal resolution
KR940006935B1 (en) * 1991-12-23 1994-07-29 주식회사 금성사 Line doubler device of tv signal

Also Published As

Publication number Publication date
CA2090696C (en) 2001-08-21
DE69311605T2 (en) 1997-10-02
US5481311A (en) 1996-01-02
DE69311605D1 (en) 1997-07-24

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130301

MKEC Expiry (correction)

Effective date: 20131009

MKEC Expiry (correction)

Effective date: 20131009