Figure 4.
NUS probability densities following a sinusoid and a Gaussian are analyzed following the same procedure as illustrated for exponential sampling in Figure 1. In all panels, the behavior of matched exponential NUS is given by the solid black line for comparison, while uniform sampling is described by the dashed black line. In (a) the sinusoid and matched exponential densities have been normalized to have the same area as uniform sampling; the value of χ is given by equation 8b or 9b. In (b) the iSNR NUS enhancements over US given by equations 8c or 9c are illustrated. In (c) the direct iSNR is obtained by multiplying the enhancement in equation 8c (sinusoid) or 9c (Gaussian) by the iSNR of uniform sampling in equation 1.