NO931227L - Fremgangsmaate og anordning ved filtrering av numeriske bilder ved blokktransportsformasjon - Google Patents
Fremgangsmaate og anordning ved filtrering av numeriske bilder ved blokktransportsformasjonInfo
- Publication number
- NO931227L NO931227L NO93931227A NO931227A NO931227L NO 931227 L NO931227 L NO 931227L NO 93931227 A NO93931227 A NO 93931227A NO 931227 A NO931227 A NO 931227A NO 931227 L NO931227 L NO 931227L
- Authority
- NO
- Norway
- Prior art keywords
- boundary pixel
- brightness level
- block
- pixels
- adjacent
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
- H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
- H04N19/51—Motion estimation or motion compensation
- H04N19/527—Global motion vector estimation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
- H04N19/86—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression involving reduction of coding artifacts, e.g. of blockiness
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Image Processing (AREA)
Abstract
Koding og dekoding av digitale bilder ved transformasjon av billedpunktblokker reduserer databithastigheten. Transformasjonen av blokker medfører diskontinuiteter hva angår lysstyrkenivå for de billedpunkter (D, E) som befinner seg ved blokkgrensene (BL1, BL2). Disse diskontinuiteter blir detektert for hvert gitt grensebilledpunkt (D) ved en endring i fortegnet for de to nivågradienter respektive beregnet med nivåene for to billed- punkter (C, E) som ligger inntil grensebilled- punktet (D). Lysstyrkenivået (NL) for grensebilled- punktet (D) blir deretter korrigert ved hjelp av en diskontinuitetskorrigeringsfaktor (FCD) med utgangspunkt i en diskontinuitetsdivergens (ED) som er lik den absolutte verdi av differansen mellom lysstyrkenivået for grensebilledpunktet (D) og aritmetisk gjennomsnitt av lysstyrkenivåer for de to tilstøtende billedpunkter, som en funksjon av en kvantiseringsstørrelse som har tilknytning til en blokk (BL1) som tilhører grensebilledpunktet. Blokken (BLI) blir deretter korrigert i sin helhet for å dempe differansene for gjennomsnittlige lysstyrkenivåer mellom to tilstøtende blokker (BL1, BL2) som er generert ved koding og dekoding.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR929204816A FR2690299B1 (fr) | 1992-04-17 | 1992-04-17 | Procede et dispositif de filtrage spatial d'images numeriques decodees par transformation par bloc. |
Publications (2)
Publication Number | Publication Date |
---|---|
NO931227D0 NO931227D0 (no) | 1993-03-31 |
NO931227L true NO931227L (no) | 1993-10-18 |
Family
ID=9429035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO93931227A NO931227L (no) | 1992-04-17 | 1993-03-31 | Fremgangsmaate og anordning ved filtrering av numeriske bilder ved blokktransportsformasjon |
Country Status (6)
Country | Link |
---|---|
US (1) | US5422964A (no) |
EP (1) | EP0566202B1 (no) |
JP (1) | JPH0662387A (no) |
DE (1) | DE69309529T2 (no) |
FR (1) | FR2690299B1 (no) |
NO (1) | NO931227L (no) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5703965A (en) * | 1992-06-05 | 1997-12-30 | The Regents Of The University Of California | Image compression/decompression based on mathematical transform, reduction/expansion, and image sharpening |
US5696851A (en) * | 1993-04-30 | 1997-12-09 | Comsat Corporation | Codeword-dependent post-filtering for vector quantization-based image compression |
TW293227B (no) * | 1994-11-24 | 1996-12-11 | Victor Company Of Japan | |
JP2723867B2 (ja) * | 1995-11-24 | 1998-03-09 | 日本電気アイシーマイコンシステム株式会社 | 画像信号復号化装置 |
US6324301B1 (en) * | 1996-01-24 | 2001-11-27 | Lucent Technologies Inc. | Adaptive postfilter for low bitrate visual telephony noise removal |
US5881180A (en) * | 1996-02-08 | 1999-03-09 | Sony Corporation | Method and apparatus for the reduction of blocking effects in images |
US5974196A (en) * | 1996-03-15 | 1999-10-26 | Sony Corporation | Method and apparatus for blocking effect reduction in images |
ES2180934T3 (es) * | 1996-03-28 | 2003-02-16 | Koninkl Philips Electronics Nv | Metodo y disposicion para codificar y decodificar imagenes. |
US5933542A (en) * | 1996-04-24 | 1999-08-03 | Sony Corporation | Method and apparatus for blocking effect reduction in images by post-processing in the spatial domain |
US6094453A (en) | 1996-10-11 | 2000-07-25 | Digital Accelerator Corporation | Digital data compression with quad-tree coding of header file |
US7010173B2 (en) * | 2000-01-13 | 2006-03-07 | At&T Corp. | Video coder employing pixel transposition |
EP0985317B1 (de) * | 1997-05-07 | 2001-11-21 | Infineon Technologies AG | Verfahren zur codierung und decodierung eines digitalisierten bildes |
FI103003B (fi) | 1997-06-13 | 1999-03-31 | Nokia Corp | Suodatusmenetelmä, suodatin ja kannettava päätelaite |
KR100243225B1 (ko) | 1997-07-16 | 2000-02-01 | 윤종용 | 블록화효과 및 링잉잡음 감소를 위한 신호적응필터링방법 및신호적응필터 |
US7239755B1 (en) | 1997-07-30 | 2007-07-03 | Lg Electronics Inc. | Method of reducing a blocking artifact when coding moving picture |
KR100281099B1 (ko) * | 1997-07-30 | 2001-04-02 | 구자홍 | 동영상의부호화에따른블록화현상제거방법 |
KR100244290B1 (ko) | 1997-09-09 | 2000-02-01 | 구자홍 | 저속 전송에서의 동영상을 위한 디블록킹 필터링 방법 |
US6937659B1 (en) * | 1997-11-14 | 2005-08-30 | Ac Capital Management, Inc. | Apparatus and method for compressing video information |
GB9822094D0 (en) | 1998-10-09 | 1998-12-02 | Snell & Wilcox Ltd | Improvements in data compression |
US8819723B1 (en) | 2000-04-27 | 2014-08-26 | The Directv Group, Inc. | System and method for brokering auxiliary data broadcasting services |
FR2818862A1 (fr) * | 2000-12-26 | 2002-06-28 | Koninkl Philips Electronics Nv | Procede de traitement de donnees |
FR2818863A1 (fr) * | 2000-12-26 | 2002-06-28 | Koninkl Philips Electronics Nv | Procede de traitement de donnees |
FR2822330B1 (fr) * | 2001-03-14 | 2003-05-02 | Thomson Multimedia Sa | Procede de codage par blocs, de type mpeg, dans lequel on affecte une resolution a chaque bloc |
FR2841423A1 (fr) * | 2002-06-25 | 2003-12-26 | Koninkl Philips Electronics Nv | Procede de detection d'artefacts de bloc |
US7227901B2 (en) | 2002-11-21 | 2007-06-05 | Ub Video Inc. | Low-complexity deblocking filter |
US7424501B2 (en) | 2003-06-30 | 2008-09-09 | Intel Corporation | Nonlinear filtering and deblocking applications utilizing SIMD sign and absolute value operations |
US7400681B2 (en) * | 2003-11-28 | 2008-07-15 | Scientific-Atlanta, Inc. | Low-complexity motion vector prediction for video codec with two lists of reference pictures |
US7747088B2 (en) * | 2005-09-28 | 2010-06-29 | Arc International (Uk) Limited | System and methods for performing deblocking in microprocessor-based video codec applications |
KR100809687B1 (ko) * | 2006-02-28 | 2008-03-06 | 삼성전자주식회사 | 영상신호에 포함된 잡음을 제거할 수 있는 영상신호처리장치 및 방법 |
JP5990217B2 (ja) * | 2014-05-21 | 2016-09-07 | キヤノン株式会社 | 画像処理装置、画像形成装置、およびそれらの制御方法 |
US10184506B2 (en) | 2014-08-11 | 2019-01-22 | Apple Inc. | Captive elements of an attachment system |
US10182623B2 (en) | 2014-08-11 | 2019-01-22 | Apple Inc. | Consumer product attachment systems having locking or expansion characteristics |
US10085523B2 (en) | 2014-08-11 | 2018-10-02 | Apple Inc. | Attachment system for an electronic device |
US10458924B2 (en) * | 2016-07-04 | 2019-10-29 | Hitachi High-Technologies Corporation | Inspection apparatus and inspection method |
CN107705320B (zh) * | 2016-08-08 | 2022-01-11 | 佳能株式会社 | 跟踪视频中的对象的边界点的方法和装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4553165A (en) * | 1983-08-11 | 1985-11-12 | Eastman Kodak Company | Transform processing method for reducing noise in an image |
US5065444A (en) * | 1988-02-08 | 1991-11-12 | Northrop Corporation | Streak removal filtering method and apparatus |
US4941043A (en) * | 1988-06-14 | 1990-07-10 | Siemens Aktiengesellschaft | Method for reducing blocking artifacts in video scene coding with discrete cosine transformation (DCT) at a low data rate |
FR2661063B1 (fr) * | 1990-04-13 | 1992-06-19 | Thomson Csf | Procede et dispositif de post-filtrage pour codage d'images par transformation cosinus discrete. |
GB2253318B (en) * | 1991-02-27 | 1994-07-20 | Stc Plc | Image processing |
US5235434A (en) * | 1991-06-27 | 1993-08-10 | Polaroid Corporation | Method and apparatus for selectively adjusting the brightness of large regions of an image |
-
1992
- 1992-04-17 FR FR929204816A patent/FR2690299B1/fr not_active Expired - Lifetime
-
1993
- 1993-03-31 NO NO93931227A patent/NO931227L/no unknown
- 1993-04-09 US US08/045,666 patent/US5422964A/en not_active Expired - Lifetime
- 1993-04-13 EP EP93201064A patent/EP0566202B1/fr not_active Expired - Lifetime
- 1993-04-13 DE DE69309529T patent/DE69309529T2/de not_active Expired - Lifetime
- 1993-04-19 JP JP5114237A patent/JPH0662387A/ja not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
FR2690299B1 (fr) | 1994-06-17 |
DE69309529T2 (de) | 1997-09-11 |
FR2690299A1 (fr) | 1993-10-22 |
EP0566202B1 (fr) | 1997-04-09 |
DE69309529D1 (de) | 1997-05-15 |
EP0566202A1 (fr) | 1993-10-20 |
JPH0662387A (ja) | 1994-03-04 |
US5422964A (en) | 1995-06-06 |
NO931227D0 (no) | 1993-03-31 |
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