Gradient-based adaptation of general gaussian kernels

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Gradient-based optimizing of gaussian kernel functions is considered. The gradient for the adaptation of scaling and rotation of the input space is computed to achieve invariance against linear transformations. This is done by using the exponential map as a parameterization of the kernel parameter manifold. By restricting the optimization to a constant trace subspace, the kernel size can be controlled. This is, for example, useful to prevent overfitting when minimizing radius-margin generalization performance measures. The concepts are demonstrated by training hard margin support vector machines on toy data.
TidsskriftNeural Computation
Udgave nummer10
Sider (fra-til)2099-2105
Antal sider7
StatusUdgivet - 2005
Eksternt udgivetJa

ID: 32645794