Michail Pappas

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Physical and chemical changes can degrade the visual color appearance of old paintings. Five digital color restoration techniques, which can be used to simulate the original appearance of paintings, are presented. Although a small number of color samples is employed in the restoration procedure, simulation results indicate that good restoration quality can(More)
Many old paintings suffer from the effects of certain physicochemical phenomena , that can seriously degrade their overall visual appearance.Digital image processing techniques can be utilized for the purpose of restoring the original appearance of a painting, with minimal physical interaction with the painting surface. In this paper, a number of methods(More)
—Digital implementations of sorting networks that rely on a digital signal processor core are not as efficient as their analog counterparts. This paper builds on the comparators for which efficient analog implementations exist that employ operational amplifiers. From a statistical point of view, comparators are based on nonlinear means. Their probability(More)
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