Browsing by Author "Esedoglu, Selim"
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Item Digital inpainting based on the Mumford-Shah-Euler image model(2001-07) Esedoglu, Selim; Shen, JianhongImage inpainting is an image restoration problem, in which image models play a critical role, as demonstrated by Chan, Kang, and Shen's recent inpainting schemes based on the bounded variation and the elastica image models. In the present paper, we propose two novel inpainting models based on the Mumford-Shah image models and the its high order correction -- the Mumford-Shah-Euler image model. We also present their efficient numerical realization based on the Gamma-convergence approximations of Ambrosio and Tortorelli, and De Giorgi.Item Stability properties of Perona-Malik scheme(2001-07) Esedoglu, SelimThe Perona-Malik scheme is a numerical technique for de-noising digital images without blurring object boundaries (edges). In general, solutions generated by this scheme do not satisfy a comparison principle. We identify conditions under which two solutions initially ordered remain ordered, and state (restricted) comparison principles. These allow us to study stability properties of the scheme. We also explore what these results say in the limit as the discretization size goes to 0.