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Title
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What does one image of one ball tell us about the focal length?
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Author
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Abstract
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| We reanimate the (sometimes forgotten) Belgian Theorems, and show how the balls of Dandelin can give us elegant proofs for geometric properties of perspective ball projections. As a consequence, we derive a new formula for computing the focal length by means of 1 image of 1 ball. By means of simulations we show the sensitivity of our formula in function of the ratio of the major axis to the minor axis of the elliptic ball image. This provides a measure of reliability and enables us to select the most appropriate ball image. |
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Language
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English
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Source (journal)
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Lecture notes in computer science. - Berlin, 1973, currens
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Source (book)
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Advanced concepts for intelligent vision systems : 16th International Conference, ACIVS 2015, Catania, Italy, October 26-29, 2015, proceedings / Battiato, Sebastiano [edit.]; et al.
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Source (series)
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Lecture notes in computer science ; 9386
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Publication
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Cham
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Springer int publishing ag
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2015
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ISSN
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0302-9743
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ISBN
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978-3-319-25902-4
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978-3-319-25902-4
978-3-319-25903-1
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DOI
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10.1007/978-3-319-25903-1_43
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Volume/pages
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9386
(2015)
, p. 501-509
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ISI
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000374794500043
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Full text (Publisher's DOI)
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