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A high-quality distance preserving output representation is provided to the neural gas NG network. The nonlinear mapping is determined concurrently along with the codebook vectors. The adaptation rule for codebook positions in the projection space minimizes a cost function that favors the trustworthy preservation of the local topology. The proposed visualization method, called OVI-NG, is an enhancement over curvilinear component analysis CCA. The results show that the mapping quality obtained with OVI-NG outperforms the original CCA, in terms of the trustworthiness, continuity, topographic function and topology preservation measures.



Author: Estévez Valencia, Pablo Antonio; - Figueroa, Cristián; -

Source: http://repositorio.uchile.cl/



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