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Portland State University

Dissertations and Theses

2014

Machine learning

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The Role Of Prototype Learning In Hierarchical Models Of Vision, Michael David Thomure Feb 2014

The Role Of Prototype Learning In Hierarchical Models Of Vision, Michael David Thomure

Dissertations and Theses

I conduct a study of learning in HMAX-like models, which are hierarchical models of visual processing in biological vision systems. Such models compute a new representation for an image based on the similarity of image sub-parts to a number of specific patterns, called prototypes. Despite being a central piece of the overall model, the issue of choosing the best prototypes for a given task is still an open problem. I study this problem, and consider the best way to increase task performance while decreasing the computational costs of the model. This work broadens our understanding of HMAX and related hierarchical …