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1. (WO2013162207) SYSTEM AND METHOD FOR AUTOMATIC GEOMETRIC CORRECTION USING RPC
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/162207    International Application No.:    PCT/KR2013/003267
Publication Date: 31.10.2013 International Filing Date: 18.04.2013
IPC:
G06T 7/60 (2006.01), H04N 5/21 (2006.01)
Applicants: UNIVERSITY OF SEOUL INDUSTRY COOPERATION FOUNDATION [KR/KR]; (Jeonnong-dong, The Univ. of Seoul) 163, Seoulsiripdae-ro, Dongdaemun-gu, Seoul 130-743 (KR)
Inventors: JUNG, Hyung Sup; (KR).
OH, Kwan Young; (KR)
Agent: HWANG MOK PARK IP GROUP; 6th Floor, Buyeong Bldg., 120-23, Seosomun-dong Jung-gu Seoul 100-764 (KR)
Priority Data:
10-2012-0043031 25.04.2012 KR
Title (EN) SYSTEM AND METHOD FOR AUTOMATIC GEOMETRIC CORRECTION USING RPC
(FR) SYSTÈME ET PROCÉDÉ DE CORRECTION GÉOMÉTRIQUE AUTOMATIQUE AU MOYEN D'UN RPC
(KO) RPC를 이용한 자동 기하 보정 시스템 및 방법
Abstract: front page image
(EN)The present invention relates to a technique for correcting a geometric image error calculated as a rational polynomial coefficient (RPC) only through a corresponding point extracted from a digital elevation model (DEM) and a stereoscopic image without direct measurement of a ground control point (GCP). To this end, a system for automatic geometric correction using an RPC according to the present invention comprises: an auxiliary data extraction unit; a corresponding point extraction unit; a first ground coordinate extraction unit; a second ground coordinate extraction unit; an RPC correction model generation unit; and an image distortion correction unit. The auxiliary data extraction unit extracts two or more different images captured from the same ground surface and auxiliary data of the two or more different images. The corresponding point extraction unit extracts a corresponding point from the two or more different images through image matching. The first ground coordinate extraction unit extracts first ground coordinates from the corresponding point and an RPC model of the auxiliary data. The second ground coordinate extraction unit extracts second ground coordinates by using the first ground coordinates and a correlation coefficient of a DEM. The RPC correction model generation unit generates an RPC correction model by correcting the RPC model on the basis of the second ground coordinates. The image distortion correction unit corrects distortion of an image by allocating ground coordinates to each image coordinates of the image by using the second ground coordinates and the RPC correction model.
(FR)L'invention concerne une technique permettant de corriger une erreur d'image géométrique calculée en tant que coefficient polynomial rationnel (RPC) au moyen uniquement d'un point correspondant extrait d'un modèle d'élévation numérique (DEM) et d'une image stéréoscopique sans mesurer directement un point de contrôle au sol (GCP). A cet effet, un système de correction géométrique automatique utilisant un RPC conformément à l'invention comprend : une unité d'extraction de données auxiliaires ; une unité d'extraction de points correspondants ; une première unité d'extraction de coordonnées au sol ; une seconde unité d'extraction de coordonnées au sol ; une unité de génération de modèle de correction RPC ; et une unité de correction de distorsion d'image. L'unité d'extraction de données auxiliaires extrait au moins deux images différentes capturées à partir de la même surface au sol et les données auxiliaires d'au moins deux images différentes. L'unité d'extraction de points correspondants extrait un point correspondant des au moins deux images différentes au moyen d'un appariement d'images. L'unité de d'extraction de premières coordonnées au sol extrait les premières coordonnées au sol à partir du point correspondant et d'un modèle RPC des données auxiliaires. L'unité de d'extraction de secondes coordonnées au sol extrait les secondes coordonnées au sol au moyen des premières coordonnées au sol et d'un coefficient de corrélation d'un DEM. L'unité de génération de modèle de correction RPC génère un modèle de correction RPC en corrigeant le modèle RPC d'après les secondes coordonnées au sol. L'unité de correction de distorsion d'image corrige la distorsion d'une image en attribuant des coordonnées au sol à chaque coordonnée de l'image au moyen des secondes coordonnées au sol et du modèle de correction RPC.
(KO)본 발명은 지상기준점에 대한 직접적인 실측 없이 수치표고모델(DEM)과 입체영상으로부터 추출한 대응점만으로 RPC(Rational Polynomial Coefficient)로 계산된 영상 기하의 오차를 보정하는 기술에 관한 것이다. 이를 위해, 본 발명에 따른 RPC를 이용한 자동 기하 보정 시스템은 보조자료 추출부, 대응점 추출부, 제1 지상좌표 추출부, 제2 지상좌표 추출부, RPC 보정 모델 생성부 및 영상왜곡 보정부를 포함한다. 상기 보조자료 추출부는 같은 지표면을 촬영한 서로 다른 둘 이상의 영상과 상기 영상에 대한 보조자료를 추출한다. 상기 대응점 추출부는 상기 서로 다른 둘 이상의 영상으로부터 영상 매칭을 통해 대응점을 추출한다. 상기 제1 지상좌표 추출부는 상기 대응점 및 상기 보조자료의 RPC(Rational Polynomial Coefficient) 모델로부터 제1 지상좌표를 추출한다. 상기 제2 지상좌표 추출부는 상기 제1 지상좌표와 수치표고모델의 상관계수를 이용하여 제2 지상좌표를 추출한다. 상기 RPC 보정 모델 생성부는 상기 제2 지상좌표를 기초로 상기 RPC 모델을 보정하여 RPC 보정 모델을 생성한다. 상기 영상왜곡 보정부는 상기 제2 지상좌표와 상기 RPC 보정 모델을 이용하여 영상의 각 영상좌표에 지상좌 표를 부여함으로써 영상의 왜곡을 보정한다.
Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, 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, 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, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, 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 (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (AL, 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, RS, 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: Korean (KO)
Filing Language: Korean (KO)