Gradient pattern analysis: Difference between revisions

Revision as of 12:46, 25 March 2009

Revision as of 12:48, 25 March 2009

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== Introduction ==

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Besides $G_{A}$ other measurements (called ''gradient moments'') can be calculated form the gradient lattice \cite{rosa03}. Considering the sets of local norms and phases as discrete compact groups, spatially distributed in a square lattice, the gradient moments have the basic property of being globally invariant (for rotation and modulation).

== Relation to other methods ==

When GPA is conjugated with wavelet analysis, then the method is called ''Gradient Spectral Analysis'', usually applied to short time series analysis \cite{rosa08})

== References ==

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\bibitem{rosa08} R.R.Rosa et al., {\em Advances in Space Research} {\bf 42}, 844 (2008), doi:10.1016/j.asr.2007.08.015.

== External Links ==