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A Pixel-Wise Varifocal Camera Model for Efficient Forward Projection and Linear Extrinsic Calibration of Underwater Cameras with Flat Housings
AbstractThis paper is aimed at presenting a new virtual camera model which can efficiently model refraction through flat housings in underwater photography. The key idea is to employ a pixel-wise virtual focal length concept to encode the refractive projection inside the flat housing. The radially-symmetric structure of the varifocal length around the normal of the housing surface allows us to encode the refractive projection with a compact representation. We show that this model realizes an efficient forward projection computation and a linear extrinsic calibration in water. Evaluations using synthesized and real data demonstrate the performance quantitatively and qualitatively.
Related Material
[pdf][bibtex]@InProceedings{Kawahara_2013_ICCV_Workshops,
author = {Kawahara, Ryo and Nobuhara, Shohei and Matsuyama, Takashi},
title = {A Pixel-Wise Varifocal Camera Model for Efficient Forward Projection and Linear Extrinsic Calibration of Underwater Cameras with Flat Housings},
booktitle = {Proceedings of the IEEE International Conference on Computer Vision (ICCV) Workshops},
month = {June},
year = {2013}
}
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