Models of covariance functions of gaussian random fields escaping from isotropy, stationarity and non negativity
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Título
Models of covariance functions of gaussian random fields escaping from isotropy, stationarity and non negativityFecha de publicación
2014-01Editor
International Society for StereologyISSN
1854-5165; 1580-3139Cita bibliográfica
GREGORI, Pablo; PORCU, Emilio; MATEU, Jorge. Models of covariance functions of Gaussian random fields escaping from isotropy, stationarity and non negativity. Image Analysis & Stereology, 2014, vol. 33, no 1, p. 75-81.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.ias-iss.org/ojs/IAS/article/view/1077Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
This paper represents a survey of recent advances in modeling of space or space-time Gaussian Random Fields (GRF), tools of Geostatistics at hand for the understanding of special cases of noise in image analysis. They ... [+]
This paper represents a survey of recent advances in modeling of space or space-time Gaussian Random Fields (GRF), tools of Geostatistics at hand for the understanding of special cases of noise in image analysis. They can be used when stationarity or isotropy are unrealistic assumptions, or even when negative covariance between some couples of locations are evident. We show some strategies in order to escape from these restrictions, on the basis of rich classes of well known stationary or isotropic non negative covariance models, and through suitable operations, like linear combinations, generalized means, or with particular Fourier transforms. [-]
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Image Analysis & Stereology, 2014, vol. 33, No 1Derechos de acceso
info:eu-repo/semantics/openAccess
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