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1. WO2003005006 - METHOD FOR DIGITIZING A SURFACE TRAVELLING AT A FAST SPEED

Publication Number WO/2003/005006
Publication Date 16.01.2003
International Application No. PCT/FR2002/002358
International Filing Date 05.07.2002
IPC
G01N 21/88 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws, defects or contamination
G01N 21/89 2006.1
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using infra-red, visible or ultra-violet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws, defects or contamination
89in moving material, e.g. paper, textiles
CPC
G01N 21/8851
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws or contamination
8851Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
G01N 21/8903
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
21Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
84Systems specially adapted for particular applications
88Investigating the presence of flaws or contamination
89in moving material, e.g. running paper or textiles
8901Optical details; Scanning details
8903using a multiple detector array
H04N 25/711
Applicants
  • I2S [FR]/[FR] (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, OM, PH, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TN, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZM, ZW)
  • BAYLE, Philippe [FR]/[FR] (UsOnly)
  • GRANCHER, Philippe [FR]/[FR] (UsOnly)
Inventors
  • BAYLE, Philippe
  • GRANCHER, Philippe
Agents
  • DRONNE, Guy
Priority Data
01/0896405.07.2001FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR DIGITIZING A SURFACE TRAVELLING AT A FAST SPEED
(FR) PROCEDE DE NUMERISATION D'UNE SURFACE DEFILANT A HAUTE VITESSE
Abstract
(EN) The invention relates to a method for digitizing the surface of a material (16) travelling at a variable v high speed in front of a linear camera (10) comprising a row of sensors (22). Said method comprises the following steps: integration of the light emitted by said material (16) for travelling lengths of said material (16) which are equal to a during a determined integration time t1 when the speed at which said material (16) travels is lower than or equal to the product of the length a of the pixels (24) and the opposite of said determined integration time t1; integration of the light emitted by said material (16) for travel lengths of said material (16) equal to k.a during a variable integration time tx equal to the product of k.a. and the opposite of the speed v; proportional increase of the gain of the linear camera (10) to the travel speed v.
(FR) L'invention concerne un procédé de numérisation de la surface d'un matériau (16) défilant à une vitesse variable v au regard d'une caméra (10) linéaire comportant une rangée de capteurs (22). Il comprend les étapes suivantes : on intègre la lumière émise par ledit matériau (16), pour des longueurs de défilement dudit matériau (16) égales à a, durant un temps d'intégration déterminé t1, lorsque la vitesse de défilement v dudit matériau (16) est inférieur ou égale au produit de la longueur a des pixels (24) et de l'inverse dudit temps d'intégration déterminé t1; et, on intègre la lumière émise par ledit matériau (16), pour des longueurs de défilement dudit matériau (16) égales à k.a, durant un temps d'intégration variable, tx égal au produit de k.a et de l'inverse de la vitesse v, et on augmente le gain de ladite caméra (10) linéaire proportionnellement à la vitesse de défilement v.
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