Date of Degree

9-2019

Document Type

Dissertation

Degree Name

Ph.D.

Program

Computer Science

Advisor

Zhigang Zhu

Committee Members

Hao Tang

Jie Gong

Ioannis Stamos

Jie Wei

Subject Categories

Artificial Intelligence and Robotics | Computer Sciences | Statistical Models | Statistics and Probability

Keywords

deep learning, machine learning, generative adversarial network, neural network, regression

Abstract

This work studies the generalization of semi-supervised generative adversarial networks (GANs) to regression tasks. A novel feature layer contrasting optimization function, in conjunction with a feature matching optimization, allows the adversarial network to learn from unannotated data and thereby reduce the number of labels required to train a predictive network. An analysis of simulated training conditions is performed to explore the capabilities and limitations of the method. In concert with the semi-supervised regression GANs, an improved label topology and upsampling technique for multi-target regression tasks are shown to reduce data requirements. Improvements are demonstrated on a wide variety of vision tasks, including dense crowd counting, age estimation, and automotive steering angle prediction. With training data limitations arguably being the most restrictive component of deep learning, methods which reduce data requirements hold immense value. The methods proposed here are general-purpose and can be incorporated into existing network architectures with little or no modifications to the existing structure.

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