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1. (WO2010078954) PROCESS AND APPARATUS FOR BLENDING IMAGES
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2010/078954 International Application No.: PCT/EP2009/009313
Publication Date: 15.07.2010 International Filing Date: 29.12.2009
IPC:
G06T 15/50 (2011.01) ,G09G 5/02 (2006.01) ,H04N 9/75 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
15
3D [Three Dimensional] image rendering
50
Lighting effects
G PHYSICS
09
EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G
ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
5
Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
02
characterised by the way in which colour is displayed
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
9
Details of colour television systems
64
Circuits for processing colour signals
74
for obtaining special effects
75
Chroma key
Applicants:
ST-ERICSSON SA [CH/CH]; 39 Chemin du Champs-des-Filles CH-1228 Plan-les-Ouates, CH (AllExceptUS)
COUPE, David [FR/FR]; FR (UsOnly)
SPINELLI, Gilles [FR/FR]; FR (UsOnly)
Inventors:
COUPE, David; FR
SPINELLI, Gilles; FR
Agent:
SCHUFFENECKER, Thierry; 120 Chemin de La Maure F-06800 Cagnes sur Mer, FR
Priority Data:
08368026.431.12.2008EP
Title (EN) PROCESS AND APPARATUS FOR BLENDING IMAGES
(FR) PROCESSUS ET APPAREIL DE MÉLANGE D’IMAGES
Abstract:
(EN) A process and circuit for blending a foreground image (B) with a background image (A), said foreground and background images being arranged in pixels and having color representations (R, G, B). The foreground foreground image (A) has a transparency parameter (T(x,y)) in accordance with a so-called alpha plane representative of the transparency profile to apply to the foreground image. The process involves the steps of: - applying a dithering method on said alpha plane in order to convert said transparency parameter (T) into a one-bit transparency parameter (T'); - use said one-bit transparency parameter (T') for controlling a multiplexing unit having two inputs respectively receiving the foreground image (A) and the background image (B). In one embodiment, the one-bit transparency parameter T' into the two extreme values of a range of continuous values, for instance coded on 8 bits. The process then applies a four-pixel interpolation method to the foreground image (A) for the purpose of creating a five level transparency parameter in the blending process, and then uses the five level transparency parameter for controlling a multiplexing circuit for the purpose of achieving blending of the foreground image with the background image.
(FR) L’invention concerne un processus et un circuit permettant de mélanger une image d’avant-plan (B) et une image d’arrière-plan (A), lesdites images d’avant-plan et d’arrière-plan étant agences en pixels et possédant des représentations couleurs (R, G, B). L’image d’avant-plan (A) possède un paramètre de transparence (T(x,y)) fonction d’un plan dit alpha représentatif du profil de transparence à appliquer à l’image d’avant-plan. Le processus comprend les étapes suivantes : appliquer un procédé anticontour sur le plan alpha afin de convertir ledit paramètre de transparence (T) en un paramètre de transparence à un bit (T’) ; utiliser ledit paramètre de transparence à un bit (T’) afin de commander une unité de multiplexage comprenant deux entrées pour recevoir respectivement l’image d’avant-plan (A) et l’image d’arrière-plan (B). Dans un mode de réalisation, le paramètre de transparence à un bit (T’) se situe dans les deux valeurs extrêmes d’une plage de valeurs continues, par exemple avec un codage 8 bits. Le processus applique ensuite un procédé d’interpolation quatre pixels à l’image d’avant-plan (A) afin de créer un paramètre de transparence à cinq niveaux dans le processus de mélange, puis utilise le paramètre de transparence à cinq niveaux afin de commander un circuit de multiplexage afin de mélanger l’image d’avant-plan et l’image d’arrière-plan.
front page image
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PE, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (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, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, SE, SI, SK, SM, 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)
Also published as:
JP2012514263US20110304642CN102282854