Issam H. Laradji

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There has been significant recent work on the theory and application of randomized coordinate descent algorithms, beginning with the work of Nesterov [SIAM J. Optim., 22(2), 2012 ], who showed that a random-coordinate selection rule achieves the same convergence rate as the Gauss-Southwell selection rule. This result suggests that we should never use the(More)
This paper presents a new perceptual image hashing approach that exploits the image color information using hypercom-plex (quaternionic) representations. Unlike grayscale-based techniques, the proposed approach preserves the color interaction between the image components that have a significant contribution in the generated perceptual image hash codes.(More)
Unlike text files, XML-based documents have structure as a property that facilitates their categorization to their respective classes. Therefore, it is imperative to have structure as an integral part of the feature vector representing an XML document. To date, many models incorporating structural information were proposed. Structure Link Vector Model(More)
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