Abstract
In this thesis, we investigate the use of dictionary learning for discriminative tasks on natural images. Our contributions can be summarized as follows: • We introduce discriminative deviation based learning to achieve principled handling of the reconstruction-discrimination tradeoff that is inherent to discriminative dictionary learning. • Since natural images obey a strong smoothness prior, we show how spatial smoothness constraints can be incorporated into the learning formulation by embedding dictionary learning into Conditional Random Field (CRF) learning. We demonstrate that such smoothness constraints can lead to state-of-the-art performance for pixel-classification tasks. • Finally, we lay down the foundations of super-latent learning. By treating sparse codes on a CRF as latent variables, dictionary learning can also be performed via the Latent (Structural) SVM formulation for jointly learning a classifier over the sparse codes. The dictionary is treated as a super-latent variable that generates the latent variables.
Notes
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Graduation Date
2013
Semester
Spring
Advisor
Tappen, Marshall
Degree
Doctor of Philosophy (Ph.D.)
College
College of Engineering and Computer Science
Department
Computer Science
Degree Program
Computer Science
Format
application/pdf
Identifier
CFE0004701
URL
http://purl.fcla.edu/fcla/etd/CFE0004701
Language
English
Release Date
May 2013
Length of Campus-only Access
None
Access Status
Doctoral Dissertation (Open Access)
STARS Citation
Khan, Muhammad Nazar, "Discriminative Dictionary Learning With Spatial Constraints" (2013). Electronic Theses and Dissertations. 2549.
https://stars.library.ucf.edu/etd/2549