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• W3171126733 abstract "Supervised classification of 3D point clouds using machine learning algorithms and handcrafted local features as covariates frequently depends on the size of the neighborhood (scale) around each point used to determine those features. It is therefore crucial to estimate the scale or scales providing the best classification results. In this work, we propose three methods to estimate said scales, all of them based on calculating the maximum values of the distance correlation (DC) functions between the features and the label assigned to each point. The performance of the methods was tested using simulated data, and the method presenting the best results was applied to a benchmark data set for point cloud classification. This method consists of detecting the local maximums of DC functions previously smoothed to avoid choosing scales that are very close to each other. Five different classifiers were used: linear discriminant analysis, support vector machines, random forest, multinomial logistic regression and multilayer perceptron neural network. The results obtained were compared with those from other strategies available in the literature, being favorable to our approach." @default.
• W3171126733 created "2021-06-22" @default.
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• W3171126733 date "2021-06-09" @default.
• W3171126733 modified "2023-10-18" @default.
• W3171126733 title "A Distance Correlation Approach for Optimum Multiscale Selection in 3D Point Cloud Classification" @default.
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• W3171126733 doi "https://doi.org/10.3390/math9121328" @default.
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