Figure 2.

Illustration of the dependence of the effect of the regularization parameter on the radius of the sphere kernel. Three spheres of different radii were simulated on a 256³ grid (enlarged views of the middle sections are shown on the left). Profile lines of the deconvolution kernels corresponding to these spheres are shown in the middle. The region relevant for the TSVD regularization is shown on the right. The effect of a certain regularization parameter on Fourier coefficient truncation (setting of coefficients to zero) is different for different radii. This is illustrated on the right for a commonly used magnitude threshold of 0.05 (2,25).