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
Mostrar afiliacións +
Actas:
III Congreso Español de Informática

Editorial: Ibergaceta

ISBN: 9788492812660

Ano de publicación: 2010

Páxinas: 109-116

Tipo: Achega congreso

GOOGLE SCHOLAR lock_openAcceso aberto editor

Resumo

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