21 June 2015 Efficient estimation of orthophoto images using visibility restriction
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The orthophoto image which is generated using an aerial photo is used in river management, road design and the various fields since the orthophoto has ability to visualize land use with position information. However, the image distortion often occurs in the ortho rectification process. This image distortion is used to estimate manually by the evaluation person with great time. The image distortion should be automatically estimated from the view point of efficiency of the process. With this motive, formed angle V between view vector at exposure point and normal vector at center point of a patch area was focused in this paper. In order to evaluate the relation between image distortion and formed angle V, DMC image which were acquired 2000m height were used and formed angle V for 10m×10m patch was adopted for computing visibility restriction. It was confirmed that image distortion occurred for the patch which show rather than 69 degree of the formed angle V. Therefore, it is concluded that efficient orthophoto visibility restriction is able to perform using the formed angle V as visibility restriction in this paper.
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Hiroyuki Miura, Hiroyuki Miura, Hirofumi Chikatsu, Hirofumi Chikatsu, } "Efficient estimation of orthophoto images using visibility restriction", Proc. SPIE 9528, Videometrics, Range Imaging, and Applications XIII, 952812 (21 June 2015); doi: 10.1117/12.2184662; https://doi.org/10.1117/12.2184662

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