caa a22 4500 467914915 CHVBK 20180406152859.0 cr unu---uuuuu 170328e20060201xx s 000 0 eng 10.1007/s11263-005-3952-y doi (NATIONALLICENCE)springer-10.1007/s11263-005-3952-y Stabilizing the Focal Length Computation for 3-D Reconstruction from Two Uncalibrated Views [Elektronische Daten] [Kenichi Kanatani, Atsutada Nakatsuji, Yasuyuki Sugaya] In order to reconstruct 3-D shape from two uncalibrated views, one needs to resolve two problems: (i) the computed focal lengths can be imaginary; (ii) the computation fails for fixated images. We present a practical remedy for these by subsampling feature points and fixing the focal length. We first summarize theoretical backgrounds and then do simulations, which reveal a rather surprising fact that when the focal length is actually fixed, not using that knowledge yields better results for non-fixated images. We give an explanation to this seeming paradox and derive a hybrid method switching the computation by judging whether or not the images are fixated. Doing simulations and real image experiments, we demonstrate the effectiveness of our method. Springer Science + Business Media, Inc., 2006 structure from motion nationallicence two-view analysis nationallicence focal length estimation nationallicence fundamental matrix nationallicence fixated images nationallicence Kanatani Kenichi Department of Computer Science, Okayama University, 700-8530, Okayama, Japan aut Nakatsuji Atsutada Internet Terminals Division, NEC Engineering, Ltd., 183-8502, Yokohama, Kanagawa, Japan aut Sugaya Yasuyuki Department of Computer Science, Okayama University, 700-8530, Okayama, Japan aut International Journal of Computer Vision Kluwer Academic Publishers 66/2(2006-02-01), 109-122 0920-5691 66:2<109 2006 66 11263 https://doi.org/10.1007/s11263-005-3952-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11263-005-3952-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kanatani Kenichi Department of Computer Science, Okayama University, 700-8530, Okayama, Japan aut NATIONALLICENCE 700 1- Nakatsuji Atsutada Internet Terminals Division, NEC Engineering, Ltd., 183-8502, Yokohama, Kanagawa, Japan aut NATIONALLICENCE 700 1- Sugaya Yasuyuki Department of Computer Science, Okayama University, 700-8530, Okayama, Japan aut NATIONALLICENCE 773 0- International Journal of Computer Vision Kluwer Academic Publishers 66/2(2006-02-01), 109-122 0920-5691 66:2<109 2006 66 11263 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer