@article {792,
	title = {Decomposition-Fusion for Label Distribution Learning},
	journal = {Information Fusion},
	volume = {66},
	year = {2021},
	note = {TIN2017-89517-P},
	month = {02/2021},
	pages = {64-75},
	abstract = {Label Distribution Learning (LDL) is a general learning framework that assigns an instance to a distribution over a set of labels rather than to a single label or multiple labels. Current LDL methods have proven their effectiveness in many real-life machine learning applications. However, LDL is a generalization of the classification task and as such it is exposed to the same problems as standard classification algorithms, including class-imbalanced, noise, overlapping or irregularities. The purpose of this paper is to mitigate these effects by using decomposition strategies. The technique devised, called Decomposition-Fusion for LDL (DF-LDL), is based on one of the most renowned strategy in decomposition: the One-vs-One scheme, which we adapt to be able to deal with LDL datasets. In addition, we propose a competent fusion method that allows us to discard non-competent classifiers when their output is probably not of interest. The effectiveness of the proposed DF-LDL method is verified on several real-world LDL datasets on which we have carried out two types of experiments. First, comparing our proposal with the base learners and, second, comparing our proposal with the state-of-the-art LDL algorithms. DF-LDL shows significant improvements in both experiments.},
	keywords = {Decomposition strategies, Label Distribution Learning, machine learning, One vs. One},
	doi = {https://doi.org/10.1016/j.inffus.2020.08.024},
	author = {Gonzalez, M and Germ{\'a}n Gonz{\'a}lez-Almagro and Triguero, Isaac and J. R. Cano and Garc{\'\i}a, Salvador}
}
@article {791,
	title = {Synthetic Sample Generation for Label Distribution Learning},
	journal = {Information Sciences},
	volume = {544},
	year = {2021},
	note = {TIN2017-89517-P},
	month = {01/2021},
	pages = {197-213},
	abstract = {Label Distribution Learning (LDL) is a general learning framework that assigns an instance to a distribution over a set of labels rather than a single label or multiple labels. Current LDL methods have proven their effectiveness in many machine learning applications. As of the first formulation of the LDL problem, numerous studies have been carried out that apply the LDL methodology to various real-life problem solving. Others have focused more specifically on the proposal of new algorithms. The purpose of this article is to start addressing the LDL problem as of the data pre-processing stage. The baseline hypothesis is that, due to the high dimensionality of existing LDL data sets, it is very likely that this data will be incomplete and/or that poor data quality will lead to poor performance once applied to the learning algorithms. In this paper, we propose an oversampling method, which creates a superset of the original dataset by creating new instances from existing ones. Then, we apply already existing algorithms to the pre-processed training set in order to validate the effcacy of our method. The effectiveness of the proposed SSG-LDL is verified on several LDL datasets, showing significant improvements to the state-of-the-art LDL methods.},
	keywords = {Data pre-processing, Label Distribution Learning, machine learning, Oversampling},
	doi = {https://doi.org/10.1016/j.ins.2020.07.071},
	author = {Gonzalez, M and Luengo, Juli{\'a}n and J. R. Cano and Garc{\'\i}a, Salvador}
}
