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학술지 Geometric Correction for Uneven Quadric Projection Surfaces Using Recursive Subdivision of Bezier Patches
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저자
Atif Ahmed, Rehan Hafiz, Muhammad Murtaza Khan, 조용주, 차지훈
발행일
201312
출처
ETRI Journal, v.35 no.6, pp.1115-1125
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.13.0112.0597
협약과제
12ZI1100, 유비쿼터스 인프라 연구, 김봉태
초록
This paper presents a scheme for geometric correction of projected content for planar and quadratic projection surfaces. The scheme does not require the projection surface to be perfectly quadratic or planar and is therefore suitable for uneven low-cost commercial and home projection surfaces. An approach based on the recursive subdivision of second-order B챕zier patches is proposed for the estimation of projection distortion owing to surface imperfections. Unlike existing schemes, the proposed scheme is completely automatic, requires no prior knowledge of the projection surface, and uses a single uncalibrated camera without requiring any physical markers on the projection surface. Furthermore, the scheme is scalable for geometric calibration of multiprojector setups. The efficacy of the proposed scheme is demonstrated using simulations and via practical experiments on various surfaces. A relative distortion error metric is also introduced that provides a quantitative measure of the suppression of geometric distortions, which occurs as the result of an imperfect projection surface. © 2013 ETRI.
키워드
B챕zier surface, Geometric correction, Projection surface, Quadratic surface, Recursive subdivision
KSP 제안 키워드
Distortion error, Error metric, Existing schemes, Geometric Distortion, Low-cost, Quantitative measure, Uncalibrated camera, geometric calibration, geometric correction, prior knowledge, second-order