open3Polynomial interpolation on the node points of Lissajous curves using Chebyshev series is an e effective
way for a fast image reconstruction in Magnetic Particle Imaging. Due to the nature of spectral methods, a
Gibbs phenomenon occurs in the reconstructed image if the underlying function has discontinuities. A possible
solution for this problem are spectral filtering methods acting on the coefficients of the interpolating polynomial.
In this work, after a description of the Gibbs phenomenon in two dimensions, we present an adaptive spectral
filtering process for the resolution of this phenomenon and for an improved approximation of the underlying
function or image. In this adaptive filtering technique, the spectral filter depends on the distance of a spatial
point to the nearest discontinuity. We show the effectiveness of this filtering approach in theory, in numerical
simulations as well as in the application in Magnetic Particle Imaging.openDe Marchi, Stefano; Erb, Wolfgang; Marchetti, Francesco.DE MARCHI, Stefano; Erb, Wolfgang; Marchetti, Francesc
