Search Results - "Olhede, S.C."

Higher-Order Properties of Analytic Wavelets by Lilly, J.M., Olhede, S.C.

“…The influence of higher-order wavelet properties on the analytic wavelet transform behavior is investigated, and wavelet functions offering advantageous…”
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The Monogenic Wavelet Transform by Olhede, S.C., Metikas, G.

“…This paper extends the 1-D analytic wavelet transform to the 2-D monogenic wavelet transform. The transformation requires care in its specification to ensure…”
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Generalized Morse wavelets by Olhede, S.C., Walden, A.T.

“…This paper examines the class of generalized Morse wavelets, which are eigenfunction wavelets suitable for use in time-varying spectrum estimation via…”
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Localisation of Geometric Anisotropy by Olhede, S.C.

“…The class of 2-D nonseparable geometrically anisotropic localization operators is defined, from the representation of a function via a family of coherent…”
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Hyperanalytic Denoising by Olhede, S.C.

“…A new threshold rule for the estimation of a deterministic image immersed in noise is proposed. The full estimation procedure is based on a separable wavelet…”
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Local directional denoising by Olhede, S.C., Walden, A.T.

“…Denoising of complex-valued signals involves the relationships between the real and imaginary parts of the signal. The authors introduce the idea of local…”
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Noise reduction in directional signals using multiple Morse wavelets illustrated on quadrature Doppler ultrasound by Olhede, S.C., Walden, A.T.

“…The use of multiple complex-valued Morse wavelets for the scalogram study of signals which are unidirectional at any time, but are bidirectional overall is…”
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Bivariate Instantaneous Frequency and Bandwidth by Lilly, J.M., Olhede, S.C.

“…The generalizations of instantaneous frequency and instantaneous bandwidth to a bivariate signal are derived. These are uniquely defined whether the signal is…”
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Estimation of Ambiguity Functions With Limited Spread by Hindberg, H., Olhede, S.C.

“…In this correspondence, we propose a class of estimators of the ambiguity function of a discrete-time process using thresholding. To this purpose, the…”
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On probability density functions for complex variables by Olhede, S.C.

“…Complex random variables arise naturally in many settings and their properties are of general interest. Past work on complex variables has mainly focused on…”
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Multiple Multidimensional Morse Wavelets by Metikas, G., Olhede, S.C.

“…This paper defines a set of operators that localize a radial image in space and radial frequency simultaneously. The eigenfunctions of the operator are…”
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Multiple wavelet analysis of amplitude/frequency modulated images by Metikas, G., Olhede, S.C.

“…We consider characterisation and analysis of images with dominant local frequencies: this class contains two-dimensional signals written as sums of amplitude…”
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