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Illustration of the tetrahedral mesh smoothing algorithm. (a) The smoothed tetrahedral mesh, where the input is the mesh in Fig. 8(a). (b) The histograms of both surface mesh and tetrahedral mesh in (a). (c) The smoothed tetrahedral mesh with the mesh in Fig. 8(c) as input. (d) The histograms of both surface mesh and tetrahedral mesh in (c). The improvement on tetrahedral mesh quality is noticeable, as compared to Fig. 8(b&d).
