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Fig. 12
Lower limit for the displacement scale (llow) as a function of the Δ-variance minimum scale (lmin) for S/N = 2.5,5,10,25, and 50, and displacements of τi = 4,12,20 pix (black, grey, and open symbols). An upper limit to the lower scale is described by the solid line: llow = 1.5 lmin + 1.5.
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