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1. (WO2002089060) IMAGE ENHANCEMENT METHODS AND APPARATUS THEREFOR
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/2002/089060 International Application No.: PCT/GB2002/001675
Publication Date: 07.11.2002 International Filing Date: 10.04.2002
Chapter 2 Demand Filed: 22.11.2002
IPC:
G06T 5/40 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
T
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
5
Image enhancement or restoration, e.g. from bit-mapped to bit-mapped creating a similar image
40
by the use of histogram techniques
Applicants:
CHESNOKOV, Vyacheslav [RU/GB]; GB (UsOnly)
APICAL LIMITED [GB/GB]; Colebrand House 18-20 Warwick Street Regent Street London W1B 5ND, GB (AllExceptUS)
Inventors:
CHESNOKOV, Vyacheslav; GB
Agent:
SPAARGAREN, Jerome; Electronic Intellectual Property Suite 308 The Foundry 156 Blackfriars Road London SE1 8EN, GB
Priority Data:
0110748.102.05.2001GB
Title (EN) IMAGE ENHANCEMENT METHODS AND APPARATUS THEREFOR
(FR) PROCEDES D'AMELIORATION D'IMAGES ET SYSTEME ASSOCIE
Abstract:
(EN) An image processing method comprising the step of processing an input signal to generate an adjusted output signal, wherein the intensity values I(x,y) for different positions (x,y) of an image are adjusted to generate an adjusted intensity value I'(x,y) in accordance with : Formula (I) where Pi (ϝ) is an orthogonal basis of functions of ϝ defined in the range 0<ϝ<1 ; and Qi (..) are antiderivatives of Formula (II) or an approximation thereto, LPFΩ[..] is an operator of low-pass spatial filtering ; Ωi is a cut-off frequency of the low-pass filter, and F(..) is a weighting function.
(FR) L'invention concerne un procédé d'amélioration d'images, qui consiste à traiter un signal d'entrée afin de produire un signal de sortie corrigé. Les valeurs d'intensité I(x,y) pour différentes positions (x,y) d'une image sont ajustées afin de produire une valeur d'intensité ajustée I'(x,y) conforme à la formule (I), dans laquelle Pi($g(g)) est une base orthogonale de fonctions de $g(g) définies dans la plage 0<$g(g)<1; et Qi (..) sont des fonctions primitives de la formule (II) ou une approximation de cette formule; LPFΩ[..] est un opérateur de filtrage spatial passe-bas; Ωi est une fréquence de coupure du filtre passe-bas; et F(..) est une fonction de pondération.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, 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, NO, NZ, OM, PH, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, 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)