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- Maite García-Sebastián, Ana Isabel González, Manuel Graña
- Neurocomputing
- 2009

A widely accepted magnetic resonance imaging (MRI) model states that the observed voxel intensity is a piecewise constant signal intensity function corresponding to the tissue spatial distribution,… (More)

- Manuel Graña, Alicia D'Anjou, +4 authors Ana Isabel González
- Applied Intelligence
- 1997

This work reports the results obtained with the application of High Order Boltzmann Machines without hidden units to construct classifiers for some problems that represent different learning… (More)

- Ana Isabel González, Manuel Graña, Alicia D'Anjou, F. Xabier Albizuri, Marie Cottrell
- Neural Processing Letters
- 1997

In this paper we study the sensitivity of the Self Organizing Map to several parameters in the context of the one-pass adaptive computation of cluster representatives over non-stationary data. The… (More)

- Andoni Beristain, Manuel Graña, Ana Isabel González
- Journal of Mathematical Imaging and Vision
- 2011

We present a skeleton computation algorithm for binary image shape which is stable and efficient. The algorithm follows these steps: first the shape boundary curves are subsampled, then the Voronoi… (More)

- Manuel Graña, Alicia D'Anjou, Ana Isabel González, F. Xabier Albizuri, Marie Cottrell
- Neurocomputing
- 1995

A stochastic approximation to the nearest neighbour (NN) classification rule is proposed. This approximation is called Local Stochastic Competition 0.22). Some corivergence properties of LSC are… (More)

Color quantization of still images can be easily stated as a clustering problem. Color quantization of sequences of images becomes a non-stationary Clustering problem. In this paper we propose a very… (More)

- Ana Isabel González, Manuel Graña, Alicia D'Anjou, F. Xabier Albizuri, Francisco Javier Torrealdea
- Applied Intelligence
- 1998

Color quantization of image sequences is a case of non-stationary clustering problem. The approach we adopt to deal with this kind of problems is to propose adaptive algorithms to compute the cluster… (More)

- Ana Isabel González, Alicia D'Anjou, Manuel Graña
- The 2006 IEEE International Joint Conference on…
- 2006

Convergence of the self-organizing map (SOM) and neural gas (NG) is usually contemplated from the point of view of stochastic gradient descent (SGD) algorithms of an energy function. SGD algorithms… (More)

- Ana Isabel González, Manuel Graña, Marie Cottrell
- Neural Computing & Applications
- 1999

In this paper we consider the application of two basic Competitive Neural Networks (CNN) to the adaptive computation of colour representatives on image sequences that show non-stationary… (More)

- Ana Isabel González, Manuel Graña, A. D ́ Anjou, Pedro Larrañaga, José Antonio Lozano, F. Xabier Albizuri
- 2007

Color quantization of still images can be easily stated as a clustering problem. Color quantization of sequences of images becomes a non-stationary clustering problem. In this paper we propose a very… (More)