Two-dimensional wavelet analysis with directional frames is well-adapted and efficient, for detecting oriented features in images. but, for (quasi-) isotropic components, it is unnecessarily redundant. Using wavelets ...
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ISBN:
(纸本)0819450804
Two-dimensional wavelet analysis with directional frames is well-adapted and efficient, for detecting oriented features in images. but, for (quasi-) isotropic components, it is unnecessarily redundant. Using wavelets with variable angular selectivity leads to a prohibitive computing cost in the continuous wavelet formalism. We propose here a solution based on a multiresolutionanalysis in the angular variable (transferred from a biorthogonal analysis on the line), in Addition to the usual multiresolution in scale. The resulting scheme is efficient and competitive with traditional methods. Some applications are given to image denoising.
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