Loglets: Generalized quadrature and phase for local spatio-temporal structure estimation
2003 (English)In: Image Analysis: 13th Scandinavian Conference, SCIA 2003 Halmstad, Sweden, June 29 – July 2, 2003 Proceedings / [ed] Josef Bigun and Tomas Gustavsson, Springer Berlin/Heidelberg, 2003, Vol. 2749, 741-748 p.Chapter in book (Refereed)
The question of which properties of a local structure estimator are important is discussed. Answers are provided via the introduction of a number of fundamental invariances. Mathematical formulations corresponding to the required invariances leads up to the introduction of a new class of filter sets termed loglets. Using loglets it is shown how the concepts of quadrature and phase can be defined in n-dimensions. A number of experiments support the claim that loglets are preferable to other designs. In particular it is demonstrated that the loglet approach outperforms a Gaussian derivative approach in resolution and robustness to variations in object illumination. It is also shown how a measure of the certainty of the estimate can be obtained using the consistency of the generalized phase with respect to orientation.
Place, publisher, year, edition, pages
Springer Berlin/Heidelberg, 2003. Vol. 2749, 741-748 p.
Lecture Notes in Computer Science, ISSN 0302-9743 (print), 1611-3349 (online) ; 2749
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-48579DOI: 10.1007/3-540-45103-X_98ISBN: 3-540-40601-8ISBN: 978-3-540-40601-3ISBN: e-978-3-540-45103-7OAI: oai:DiVA.org:liu-48579DiVA: diva2:269475