A new multiresolution blob detector applied to photogrammetry

  1. Raquel Dosil 2
  2. Xosé M. Pardo 2
  3. Xosé R. Fdez-Vidal 1
  4. Antón García-Díaz 3
  5. Víctor Leborán 2
  1. 1 Dpto. de Física Aplicada Escola Politécnica Superior Univ. de Santiago de Compostela
  2. 2 Dpto. de Electrónica e Computación Universidade de Santiago de Compostela
  3. 3 Laboratorio Oficial de Metroloxía de Galicia Parque Tecnolóxico de Galicia
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Konferenzberichte:
III Congreso Español de Informática

Verlag: Ibergaceta

ISBN: 9788492812660

Datum der Publikation: 2010

Seiten: 109-116

Art: Konferenz-Beitrag

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Zusammenfassung

Industrial applications of photogrammetry usuallyinvolve the detection of targets placed on thesurfaces of objects. Typical targets presentcircular shapes, which under perspectivedistortion can be well approximated by anelliptical contour. In this paper we present asolution for the detection of circular targets, basedon a new technique for radial symmetry detection.At a given scale, radial symmetry is defined as theproduct of a set of oriented features, so that onlyregions of space with contributions from allorientations will have strong responses. Amultiresolution measure is obtained as themaximum over a set of scales. This operatordetects both circular and elliptical regions andpresents a sharper point spread function comparedto other detectors