"Plug-and-Play" Edge-Preserving Regularization [article]

Donghui Chen, Misha E. Kilmer, Per Christian Hansen
2014 arXiv   pre-print
In many inverse problems it is essential to use regularization methods that preserve edges in the reconstructions, and many reconstruction models have been developed for this task, such as the Total Variation (TV) approach. The associated algorithms are complex and require a good knowledge of large-scale optimization algorithms, and they involve certain tolerances that the user must choose. We present a simpler approach that relies only on standard computational building blocks in matrix
more » ... tions, such as orthogonal transformations, preconditioned iterative solvers, Kronecker products, and the discrete cosine transform -- hence the term "plug-and-play." We do not attempt to improve on TV reconstructions, but rather provide an easy-to-use approach to computing reconstructions with similar properties.
arXiv:1406.1001v1 fatcat:nitpovxlzff3zg5dc7bp6hnaau