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Title: Multi-Layer Dictionary Learning Using Low-Rank Updates
Committee:
Dr. David Anderson, ECE, Chair, Advisor
Dr. Mark Davenport, ECE
Dr. Justin Romberg, ECE
Dr. Ashwin Pananjady, ECE
Dr. Jacob Abernethy, CoC
Abstract: This dissertation presents a novel convolutional dictionary learning algorithm for signals with a large number of channels. The algorithm uses low-rank updates for the dictionary, so that a matrix decomposition necessary for pursuit can be updated efficiently. The novel approach is applied to multi-layer dictionary models with multi-channel dictionaries and single-channel coefficients and demonstrated on the task of JPEG compression artifact removal.