Automatic tongue analysis will be of important meaning for traditional chinese medicine to develop, promote modernization. Tongue color automatic classification, based on LVQ neural networks classifier, is proposed in this paper. In the design of the tongue color classifier, training samples selection based on the rule of “2σ” is proposed, and Fisher Ratio is used as a basis in color space selection, such that the accuracy of the classifier is improved. Experiments showed that the results obtained with ...