Spectral filter
= Spectral filter
A spectral filter replaces unstable inversion of a singular value $\sigma$ by a bounded scalar factor $g_\alpha(\sigma)$. For Tikhonov regularization, $g_\alpha(\sigma)=\sigma/(\sigma^2+\alpha)$.
= Spectral filter
A spectral filter replaces unstable inversion of a singular value $\sigma$ by a bounded scalar factor $g_\alpha(\sigma)$. For Tikhonov regularization, $g_\alpha(\sigma)=\sigma/(\sigma^2+\alpha)$.