Bayesian methods for machine learning and image processing problems
Abstract
In this thesis, we study the sparse Bayesian linear model for regression and classification tasks and for solving image processing problems. We start with an overview of the Bayesian inference methodology and its application to linear regression. We then develop a computationally efficient training algorithm for sparse Bayesian regression of images. The proposed training algorithm uses operations in the Fourier domain and the conjugate gradients method, in order to allow regression of large images at reasonable computational cost. We then apply this algorithm to detect objects in images, using a variant of the relevance vector machine (RVM), which uses many types of kernels simultaneously and we call the multikernel RVM. Next, we use the sparse Bayesian linear model to estimate the point spread function (PSF) in the blind image deconvolution (BID) problem. We propose a Bayesian model that estimates the support of the blurring PSF, allows reconstruction of image edges and achieves noise ...
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