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Visual analytics for user-assisted label propagation in neural-network image classifier design

Grant number: 17/25327-3
Support type:Scholarships abroad - Research Internship - Master's degree
Effective date (Start): April 01, 2018
Effective date (End): September 30, 2018
Field of knowledge:Physical Sciences and Mathematics - Computer Science
Principal Investigator:Alexandre Xavier Falcão
Grantee:Bárbara Caroline Benato
Supervisor abroad: Alexandru-Cristian Telea
Home Institution: Instituto de Computação (IC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Local de pesquisa : University of Groningen, Netherlands  
Associated to the scholarship:16/25776-0 - Autoencoders neural networks optimization by visual analytics data, BP.MS


Deep neural networks can be very effective for image classification, but they usually rely on regularization methods, transfer learning, and/or large supervised training sets to reduce/avoid high classification accuracy on the training data with low accuracy on unseen test sets --- i.e., a phenomenon known as data overfitting. Transfer learning is not always possible and large supervised training sets are usually impractical in applications that require experts for data supervision. Possible solutions include data augmentation and other strategies to improve the architecture and weights of the network from a limited number of supervised examples. We have investigated such solutions in the main project, FAPESP 2016/25776-0, through the use of Encoder-Decoder Neural Networks (EDNNs), Convolutional Neural Networks (CNNs), and Visual Analytics. We are interested in solutions that improve the design of a CNN for image classification by exploiting the EDNN and Visual Analytics methods to copy with the absence of supervised examples. Therefore, the purpose of this BEPE project is the design of an user interface for interactive machine learning based on EDNNs, CNNs, and Visual Analytics. Validation studies will be conducted with image datasets from distinct applications related to the thematic project, FAPESP 2014/12236-1, coordinated by the advisor.

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