Convolution of the infinite power-law models (no outer edge within the entire image area). The spherical (dashed curves) and cylindrical (solid curves) models with the radial profiles, analogous to 𝒫_{A|B|C|D} (Fig. 1), were convolved with two types of kernels (thin dotted curves) of the half maximum sizes of {4,32, 256}″. Shown are the results for the pure Gaussian kernels O _j (top) and power-law kernels 𝒦_j (bottom). The dashed horizontal lines indicate the half maximum level.