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Machine translation
1. (WO2005065115) DIRECTIONAL VIDEO FILTERS FOR LOCALLY ADAPTIVE SPATIAL NOISE REDUCTION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2005/065115    International Application No.:    PCT/US2004/040537
Publication Date: 21.07.2005 International Filing Date: 06.12.2004
IPC:
G06K 9/40 (2006.01)
Applicants: GENERAL INSTRUMENT CORPORATION [US/US]; 101 Tournament Drive, Horsham, PA 19044 (US) (For All Designated States Except US).
ANDERSON, Candace M. [US/US]; (US) (For US Only)
Inventors: ANDERSON, Candace M.; (US)
Agent: ROCKETT, Esteban A.,; 101 Tournament Drive, MD: PA06/1-3032, Horsham, PA 19044 (US)
Priority Data:
10/744,721 23.12.2003 US
10/809,022 24.03.2004 US
Title (EN) DIRECTIONAL VIDEO FILTERS FOR LOCALLY ADAPTIVE SPATIAL NOISE REDUCTION
(FR) FILTRES VIDEO DIRECTIONNELS POUR LA REDUCTION ADAPTATIVE LOCALE DE BRUIT SPATIAL
Abstract: front page image
(EN)Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. Low pass filtering is applied only along object boundaries and unstructured areas within the image so as to minimize the tendency to blur image edges. Using only four high pass filters to locate horizontal, vertical and diagonal image edges passing through the center of a 3x3 pixel array provides good results.
(FR)Le bruit spatial est réduit dans une image ayant une pluralité de pixels par la détection de frontières d'objets et de zones non structurées dans l'image et l'application de filtres passe-haut à trois prises à chaque pixel dans l'image dans au moins quatre, mais moins de huit directions en vue de déterminer la meilleure direction pour chaque filtrage passe-bas local. Le filtrage passe-bas est appliqué uniquement selon les frontières d'objets et de zones non structurées au sein de l'image en vue de minimiser la tendance de rendre flous les contours d'images. L'utilisation de seulement quatre filtres passe-haut pour la localisation des contours d'image horizontal, vertical et diagonal traversant le centre d'un réseau de pixel 3x3 fournit de bons résultats.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)