Vector Gradient Intersection Transformation

Details Vector Gradient Intersection Transformation Vector Gradient Intersection Transformation

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..394..121l&link_type=abstract

Astronomical Data Analysis Software and Systems ASP Conference Series, Vol. 394, Proceedings of the conference held 23-26 Septem

Astronomy and Astrophysics

Astronomy

Scientific paper

A new method for the detection of circular objects in images is presented. A new transformation, the Vector Gradient Intersection Transformation (VGIT), is used to determine the centres of circular objects. It is based on the principle that imaginary lines, defined by the gradient vectors at a circle's boundary, all intersect in its centre. This easily allows one to determine the centres of (even partial) circles. The complexity of the implemented algorithm is of the order of O(N\cdot√{N}). The radius of a circle can easily be found in a second stage.

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