A Feature Selection Algorithm Based on Boosting for Road Detection

Abstract

Feature selection is very important for road detection. Generally, optimal feature set is very hard to be determined manually by prior-knowledge. In this paper, a feature selection algorithm based on boosting is proposed. To fully utilize potential feature correlations, the features are combined. The feature vector is enlarged by the combined features, and the new feature vector is called raw feature vector. In this paper, the classify power of each feature is evaluated by the error rate and converge speed of boosting classifier which is based on single feature. After that, the features are selected according to itpsilas classify power. The selected features are reassembled to B-feature vector. Then features are weighted according to its power in classification. The weighted B-feature vector is called B-W-Feature Vector. Three classifiers are used to evaluate the raw feature vector, the B-Feature and the B-W-Feature. The experiment results show selected and weighted feature vector can improve the classification performance.