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Proceedings Paper

Shape matching by splines
Author(s): Jarmo Pirhonen; Keijo Inkila
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Paper Abstract

We present a new approach to the problem of matching spline curves. The method formulates the matching problem directly between control polygons and knot sequences of the B-spline curves. The control polygon and the knot sequence contain all shape information of a B-spline curve. The consequences are that curves do not need to be sampled in the matching process and sampling frequency does not have to be considered. The method is invariant under affine coordinate transformation. We give a short introduction to B-splines, explain the properties which make B-splines interesting with respect to computer vision and digital photogrammetry, give the matching procedure, three examples, and discuss some generalizations to which the use of rational B-splines curves seems to be interesting because these are invariant under projective coordinate transformation.

Paper Details

Date Published: 17 August 1994
PDF: 5 pages
Proc. SPIE 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision, (17 August 1994); doi: 10.1117/12.182901
Show Author Affiliations
Jarmo Pirhonen, Helsinki Univ. of Technology (Finland)
Keijo Inkila, Helsinki Univ. of Technology (Finland)


Published in SPIE Proceedings Vol. 2357:
ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision
Heinrich Ebner; Christian Heipke; Konrad Eder, Editor(s)

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