Abstract
Road surface identification is attracting more attention in recent years as part of the development of autonomous vehicle technologies. Most works consider multiple sensors and many features in order to produce a more reliable and robust result. However, on-board limitations and generalization concerns dictate the need for dimensionality reduction methods. This work considers four dimensionality reduction methods: principal component analysis, sequential feature selection, ReliefF, and a novel feature ranking method. These methods are used on data obtained from a modified passenger car with four types of sensors. Results were obtained using three classifiers (linear discriminant analysis, support vector machines, and random forests) and a late fusion method based on alpha integration, reaching up to 96.10% accuracy. The considered dimensionality reduction methods were able to reduce the number of features required for classification greatly and increased classification performance. Furthermore, the proposed method was faster than ReliefF and sequential feature selection and yielded similar improvements.
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This work was supported by Spanish Administration and European Union grant TEC2017-84743-P, and Generalitat Valenciana under grant PROMETEO/2019/109.
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Safont, G., Salazar, A., Rodríguez, A., Vergara, L. (2020). Comparison of Dimensionality Reduction Methods for Road Surface Identification System. In: Arai, K., Kapoor, S., Bhatia, R. (eds) Intelligent Computing. SAI 2020. Advances in Intelligent Systems and Computing, vol 1229. Springer, Cham. https://doi.org/10.1007/978-3-030-52246-9_40
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