A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling
Advancement on computer and sensing technologies has generated exponential growth in the data available for the development of systems that support decision-making in fields such as health, entertainment, manufacturing, among others. This fact has made that the fusion of data from multiple and heter...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/14/3919 |
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| author | Henry Jhoán Areiza-Laverde Andrés Eduardo Castro-Ospina María Liliana Hernández Gloria M. Díaz |
| author_facet | Henry Jhoán Areiza-Laverde Andrés Eduardo Castro-Ospina María Liliana Hernández Gloria M. Díaz |
| author_sort | Henry Jhoán Areiza-Laverde |
| collection | DOAJ |
| description | Advancement on computer and sensing technologies has generated exponential growth in the data available for the development of systems that support decision-making in fields such as health, entertainment, manufacturing, among others. This fact has made that the fusion of data from multiple and heterogeneous sources became one of the most promising research fields in machine learning. However, in real-world applications, to reduce the number of sources while maintaining optimal system performance is an important task due to the availability of data and implementation costs related to processing, implementation, and development times. In this work, a novel method for the objective selection of relevant information sources in a multimodality system is proposed. This approach takes advantage of the ability of multiple kernel learning (MKL) and the support vector machines (SVM) classifier to perform an optimal fusion of data by assigning weights according to their discriminative value in the classification task; when a kernel is designed for representing each data source, these weights can be used as a measure of their relevance. Moreover, three algorithms for tuning the Gaussian kernel bandwidth in the classifier prediction stage are introduced to reduce the computational cost of searching for an optimal solution; these algorithms are an adaptation of a common technique in unsupervised learning named local scaling. Two real application tasks were used to evaluate the proposed method: the selection of electrodes for a classification task in Brain–Computer Interface (BCI) systems and the selection of relevant Magnetic Resonance Imaging (MRI) sequences for detection of breast cancer. The obtained results show that the proposed method allows the selection of a small number of information sources. |
| first_indexed | 2024-03-10T18:28:43Z |
| format | Article |
| id | doaj.art-808614b487e64a09867ba6a05b85a390 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T18:28:43Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-808614b487e64a09867ba6a05b85a3902023-11-20T06:46:37ZengMDPI AGSensors1424-82202020-07-012014391910.3390/s20143919A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local ScalingHenry Jhoán Areiza-Laverde0Andrés Eduardo Castro-Ospina1María Liliana Hernández2Gloria M. Díaz3MIRP Lab–Parque i, Instituto Tecnológico Metropolitano (ITM), Medellín 050013, ColombiaMIRP Lab–Parque i, Instituto Tecnológico Metropolitano (ITM), Medellín 050013, ColombiaGrupo de Investigación del Instituto de Alta Tecnología Médica (IATM), Ayudas Diagnósticas Sura, Medellín 050026, ColombiaMIRP Lab–Parque i, Instituto Tecnológico Metropolitano (ITM), Medellín 050013, ColombiaAdvancement on computer and sensing technologies has generated exponential growth in the data available for the development of systems that support decision-making in fields such as health, entertainment, manufacturing, among others. This fact has made that the fusion of data from multiple and heterogeneous sources became one of the most promising research fields in machine learning. However, in real-world applications, to reduce the number of sources while maintaining optimal system performance is an important task due to the availability of data and implementation costs related to processing, implementation, and development times. In this work, a novel method for the objective selection of relevant information sources in a multimodality system is proposed. This approach takes advantage of the ability of multiple kernel learning (MKL) and the support vector machines (SVM) classifier to perform an optimal fusion of data by assigning weights according to their discriminative value in the classification task; when a kernel is designed for representing each data source, these weights can be used as a measure of their relevance. Moreover, three algorithms for tuning the Gaussian kernel bandwidth in the classifier prediction stage are introduced to reduce the computational cost of searching for an optimal solution; these algorithms are an adaptation of a common technique in unsupervised learning named local scaling. Two real application tasks were used to evaluate the proposed method: the selection of electrodes for a classification task in Brain–Computer Interface (BCI) systems and the selection of relevant Magnetic Resonance Imaging (MRI) sequences for detection of breast cancer. The obtained results show that the proposed method allows the selection of a small number of information sources.https://www.mdpi.com/1424-8220/20/14/3919machine learningmultimodalitymultiple kernel learningsupport vector machinessource selection |
| spellingShingle | Henry Jhoán Areiza-Laverde Andrés Eduardo Castro-Ospina María Liliana Hernández Gloria M. Díaz A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling Sensors machine learning multimodality multiple kernel learning support vector machines source selection |
| title | A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling |
| title_full | A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling |
| title_fullStr | A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling |
| title_full_unstemmed | A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling |
| title_short | A Novel Method for Objective Selection of Information Sources Using Multi-Kernel SVM and Local Scaling |
| title_sort | novel method for objective selection of information sources using multi kernel svm and local scaling |
| topic | machine learning multimodality multiple kernel learning support vector machines source selection |
| url | https://www.mdpi.com/1424-8220/20/14/3919 |
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