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Title : Analysis of Epipolar Geometry Mapping Relation for Digital Frame Camera Images
Company : Zhengzhou Institute of Surveying and Mapping
File Name : GENG.pdf
Size : 713481
Type : application/pdf
Date : 27-May-2014
Downloads : 11

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Authors: Zexun Geng and Baoming Zhang

Digital aerial frame cameras are widely used in mapping applications. As one most effective and frequently used constraint in digital photogrammetry research and practices, however, epipolar geometry relation of digital frame camera is not investigated deeply. In this paper, analytical transforming relation between center projective image (CPI) obtained by digital frame camera and epipolar image (EPI) is derived, based on which some fruitful result are revealed. The contributions of this paper are as follows. First the monotone mapping relation from CPI to EPI is obtained, which lays the foundation of two calibration algorithms in epipolar image generation. One is the fast indirect rectification per block algorithm; the other is direct rectification algorithm for any sub-region in CPI. Then a critical epipolar line is proved to be existed in CPI. The coordinates of epipolar point that all epipolar lines intersect at in CPI, are deduced thirdly. From that epipolar point, it is very easy to get slant epipolar line that goes through any image point in CPI.
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