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Domain adaptation with minimal supervision in multimedia problems

Grant number: 15/09169-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): August 01, 2015
Effective date (End): June 30, 2018
Field of knowledge:Physical Sciences and Mathematics - Computer Science - Computing Methodologies and Techniques
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Ricardo da Silva Torres
Grantee:Luis Augusto Martins Pereira
Home Institution: Instituto de Computação (IC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


A common assumption in the conventional machine learning setting is that the training set and the test set follow the same probability distribution. Unfortunately, in many real-world applications, data captured by different devices or under varied acquisition conditions may cause distribution mismatch between these sets. One way to address this problem is through domain adaptation - which can be seen as a transfer learning approach, since the goal is to adapt a model trained on a source domain to recognize new instances from a new target domain. A shortcoming of this methods, however, it is assumed (during the model building) a large amount of labeled data available in the source domain and, depending on the case, a small amount of labeled data available in the target domain. Nonetheless, annotating data is a costly process, mainly for the problems involving images or videos, whose data sets may contain millions of instances. In view of this context, our goal in this research project is to investigate and to propose domain adaptation methods that enable the use of minimal supervision - i.e., the use of restricted amount of labeled data in the source domain, which can reduce the need for large amount of labeled data. Among the contributions of this project is the application of the developed methods as solutions for domain adaptation problems in two Microsoft/FAPESP projects (#2013/50155-0 and #2013/50169-1), which seek, respectively, a better understanding of phenological and ecological processes in the face of climate changes. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PEREIRA, LUIS A. M.; TORRES, RICARDO DA SILVA. Semi-supervised transfer subspace for domain adaptation. PATTERN RECOGNITION, v. 75, n. SI, p. 235-249, MAR 2018. Web of Science Citations: 12.

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