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Conversion of Fisheye Image to Perspective Image Using Nonlinear Scaling Function

비선형 스케일링 함수를 이용한 어안 영상의 원근 변환

  • 김태우 (한양사이버대학교 정보통신공학과) ;
  • 조태경 (상명대학교 정보통신공학과)
  • Published : 2009.01.31

Abstract

The fisheye image acquired with a fisheye camera has wider field of view than a general use camera. But large distortion of the object in the image requires conversion of the fisheye image to the perspective image because of user's difficult perception. The existing Ishii's method[1] has the problem that the object can has sire and geometrical distortion in the transformed image because it uses equidistance projection. This paper presented a conversion technique of the fisheye image to the perspective image using sealing function. In the experiments, it was shown that our method reduced size and geometrical distortion by applying the scaling function.

어안 렌즈 카메라로 촬영한 어안 영상은 일반 카메라 영상보다 화각이 크다. 반면 영상에서 피사체의 왜곡이 커서 사용자의 인지가 어려우므로 원근 영상으로 변환이 필요하다. 기존의 Ishii 방법[1]은 등거리 투영을 사용하므로 피사체가 변환 영상에서 크기와 기하학적 왜곡이 생기는 문제점을 가지고 있었다. 본 논문에서는 스케일링 함수를 이용한 어안 영상의 원근 영상 변환 방법을 제안하였다. 실험에서, 제안한 방법은 스케일링 함수를 적용함으로써 크기 왜곡과 기하학적 왜곡이 감소되었다.

Keywords

References

  1. Chiharu Ishii, Yoshie Sudo, and Hiroshi Hashimoto(2003), " An Image Conversion Algorithm from Fish Eye Image to Perspective Image for Human Eyes", International Conference on Advanced Intelligent Mechtronics, pp.1009-1014.
  2. Shigang Li, Masao Nakano, and Norishige Chiba(2004), "Acquisition of Spherical Image by Fish-eye Conversion Lens", IEEE Virtual Reality 2004, pp.235-236. https://doi.org/10.1109/VR.2004.1310086
  3. H.Tanahashi, D.Shimada, K.Yamamoto and Y.niwa(2001), "Acquisition of Three-Dimensional Information in a Real Environment by Using the Stereo Omni-directional System (SOS)", Proc. of the Third International Conference on 3-D Imaging and Modeling (3DIM2001), pp.365-371.
  4. K.Yamamoto, H.Tanahashi, S.Kuwashima and Y.Niwa(2001), "Sensing of Real Environment by Stereo Omni-directional System (SOS)", Transactions of lEE Japan, Vol. 121-C, No.5, pp.876-881.
  5. Y.Yagi and N.Yokoya(2001), "Omnidirectional Vision: A Survey on Sensors and Applications", IPSJ Transactions on Computer Vision and Image Media, Vol.42, No.SIG12-003.
  6. N.Watanabe(2002), "Reconstruction of 3-Dimensional Model from Equi-Distance $(f-{\theta})$ Fish-Eye Images", Proc. of the 8th Symposium on Sensing Via Image Information, pp.389-394.