Portal de Periódicos da CAPES

Semi-supervised geodesic Generative Topographic Mapping

2009; Elsevier BV; Volume: 31; Issue: 3 Linguagem: Inglês

10.1016/j.patrec.2009.09.029

1872-7344

Raúl Cruz‐Barbosa, Alfredo Vellido,

Data Management and Algorithms

We present a novel semi-supervised model, SS-Geo-GTM, which stems from a geodesic distance-based extension of Generative Topographic Mapping that prioritizes neighbourhood relationships along a generated manifold embedded in the observed data space. With this, it improves the trustworthiness and the continuity of the low-dimensional representations it provides, while behaving robustly in the presence of noise. In SS-Geo-GTM, the model prototypes are linked by the nearest neighbour to the data manifold constructed by Geo-GTM. The resulting proximity graph is used as the basis for a class label propagation algorithm. The performance of SS-Geo-GTM is experimentally assessed, comparing positively with that of an Euclidean distance-based counterpart and with those of alternative manifold learning methods.