Refinement to a Wavelet-Based Algorithm for the Estimation of Velocity Vector Fields.
Guillermo Tonsmann, John M. Tyler, Nan D. Walker, Lawrence J. Rouse, William J. Wiseman · Civil War Book Review · 2004
This paper presents a refinement to the algorithm that estimates velocity vectors fields from sequence of images. This algorithm was introduced in a previous publication of these series [8]. The algorithm uses wavelet analysis to decompose sea surface temperature satellite images into complementary sub-images of decreasing resolution. Maximization of cross correlation is used to detect similarities between decomposed sub-images as indicators for likely displacements of ocean features. The algorithm performed well under controlled circumstances. However, when tested with SST images from the Gulf of Mexico some discrepancies arose between the algorithm estimations and corresponding drifter data. In this paper we discuss some of these discrepancies and introduce the idea of reference vector fields to improve estimations.