A Signer-Independent Sign Language Recognition System Based on the Weighted KNN/HMM

Aiming at the feature of signer-independent sign language recognition the training data complexity caused by mass data and noticeable distinctions between different people data, the weighted KNN/HMM model is presented in this paper. This model is made of two blocks, which is part of sign language classification and recognition. In classing part, the KNN (K-Nearest Neighbor, KNN) is used to learn the training samples. Considering the different contributions of sign language features to pattern classification we give different weight to different characteristics. And the category of test sample is decided by the sum of weighted distance. In recognition part, weighted KNN classification result is taken as the state-input of HMM (Hidden Markov models, HMM) to implement sign language recognition, combine with the ability to temporal data modeling and fuzzy inference of HMM model. Experiment results show that weighted KNN/HMM sign language recognition model are efficient on either recognition speed or recognition rate.