Lecture Notes in Computer Science vol:2013 pages:250-259
International conference on advances in pattern recognition - ICAPR 2001 location:Rio de Janeiro, Brazil date:11-14 March 2001
In this contribution, a novel and robust, geometry-based grouping strategy is proposed. Similar, planar patterns in special relative positions (but not necessarily coplanar) are detected, i.e. patterns are searched that appear repeatedly in the image. The grouping is based on the idea of fixed structures. These are structures such as lines or points that remain fixed under the transformation mapping the patterns onto each other. As they define subgroups of the general group of projectivities, they significantly reduce the complexity of the problem. First, some initial matches are found by comparing local, affinely invariant regions. Then, possible fixed structure candidates are hypothesized using a cascaded Hough transform. In a second step, these candidates are verified. In this paper, we concentrate on planar homologies, i.e. subgroups that have a line of fixed points and a pencil of fixed lines.
Turina A., Tuytelaars T., Moons T., Van Gool L., ''Grouping via the matching of repeated patterns'', Lecture notes in computer science, vol. 2013, pp. 250-259 (Proceedings international conference on advances in pattern recognition - ICAPR 2001, March 11-14, 2001, Rio de Janeiro, Brazil).