IEIE Transactions on Smart Processing and Computing

The Institute of Electronics and Information Engineers (대한전자공학회)
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Automatic Estimation of Spatially Varying Focal Length for Correcting Distortion in Fisheye Lens Images

  • Kim, Hyungtae (Image Processing and Intelligent Systems Laboratory, Graduate School of Advanced Image Science, Multimedia, and Film, Chung-Ang University) ;
  • Kim, Daehee (Image Processing and Intelligent Systems Laboratory, Graduate School of Advanced Image Science, Multimedia, and Film, Chung-Ang University) ;
  • Paik, Joonki (Image Processing and Intelligent Systems Laboratory, Graduate School of Advanced Image Science, Multimedia, and Film, Chung-Ang University)
  • Received : 2013.07.14
  • Accepted : 2013.09.12
  • Published : 2013.12.31
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Abstract

This paper presents an automatic focal length estimation method to correct the fisheye lens distortion in a spatially adaptive manner. The proposed method estimates the focal length of the fisheye lens by generating two reference focal lengths. The distorted fisheye lens image is finally corrected using the orthographic projection model. The experimental results showed that the proposed focal length estimation method is more accurate than existing methods in terms of the loss rate.

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