Search results for "Stochastic processes"

showing 3 items of 103 documents

Directionlets: Anisotropic Multidirectional representation with separable filtering

2006

In spite of the success of the standard wavelet transform (WT) in image processing in recent years, the efficiency of its representation is limited by the spatial isotropy of its basis functions built in the horizontal and vertical directions. One-dimensional (1-D) discontinuities in images (edges and contours) that are very important elements in visual perception, intersect too many wavelet basis functions and lead to a nonsparse representation. To efficiently capture these anisotropic geometrical structures characterized by many more than the horizontal and vertical directions, a more complex multidirectional (M-DIR) and anisotropic transform is required. We present a new lattice-based pe…

geometrysparse image representationMultiresolution analysisInformation Storage and RetrievalGeometryBasis functionDirectional vanishing momentsseparable filteringwaveletsWaveletmultiresolutionImage Interpretation Computer-AssistedComputer GraphicsCurveletComputer SimulationmultidirectionMathematicsStochastic ProcessesModels StatisticalMathematical analysisWavelet transformfilter banksNumerical Analysis Computer-AssistedSignal Processing Computer-AssistedImage EnhancementFilter bankComputer Graphics and Computer-Aided DesignContourletFilter designAnisotropyArtifactsdirectionletsAlgorithmsFiltrationSoftware
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Gradient walks and $p$-harmonic functions

2017

osittaisdifferentiaaliyhtälötMarkov chainApplied MathematicsGeneral Mathematicsta111010102 general mathematics01 natural sciences010101 applied mathematicsHarmonic functionpartial differential equationsstochastic processesStatistical physics0101 mathematicsstokastiset prosessitMathematicsProceedings of the American Mathematical Society
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Decoupling on the Wiener space and variational estimates for BSDEs

2015

rajoitettu keskiheilahtelubounded mean oscillationstochastic processesstokastiset differentiaaliyhtälötdifferentiaaliyhtälötstochastic differential equationsstokastiset prosessit
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