Concept
Quadrature mirror filter
Related publications (48)
Optimized Wavelet Denoising for Self-Similar alpha-Stable Processes
We investigate the performance of wavelet shrinkage methods for the denoising of symmetric-a-stable (S alpha S) self-similar stochastic processes corrupted by additive white Gaussian noise (AWGN), where a is tied to the sparsity of the process. The wavelet ...
2017AUTOREGRESSIVE MOVING AVERAGE GRAPH FILTERS A STABLE DISTRIBUTED IMPLEMENTATION
We present a novel implementation strategy for distributed autoregressive moving average (ARMA) graph filters. Differently from the state of the art implementation, the proposed approach has the following benefits: (i) the designed filter coefficients come ...
Ieee2017Maximally Localized Radial Profiles for Tight Steerable Wavelet Frames
Michaël Unser, Virginie Sophie Uhlmann, Pedram Pad
A crucial component of steerable wavelets is the radial profile of the generating function in the frequency domain. In this paper, we present an infinite-dimensional optimization scheme that helps us find the optimal profile for a given criterion over the ...
IEEE2016FIR filters for hardware-based real-time multi-band image blending
Yusuf Leblebici, Vladan Popovic
Creating panoramic images has become a popular feature in modern smart phones, tablets, and digital cameras. A user can create a 360 degree field-of-view photograph from only several images. Quality of the resulting image is related to the number of source ...
Spie-Int Soc Optical Engineering2015Automatic Feature Learning for Spatio-Spectral Image Classification With Sparse SVM
Including spatial information is a key step for successful remote sensing image classification. In particular, when dealing with high spatial resolution, if local variability is strongly reduced by spatial filtering, the classification performance results ...
Ieee-Inst Electrical Electronics Engineers Inc2014Decay Properties of Riesz Transforms and Steerable Wavelets
Michaël Unser, John Paul Ward, Kunal Narayan Chaudhury
The Riesz transform is a natural multidimensional extension of the Hilbert transform, and it has been the object of study for many years due to its nice mathematical properties. More recently, the Riesz transform and its variants have been used to construc ...
Siam Publications2013Wavelet-Based Reconstruction for Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) scanners produce raw measurements that are unfit to direct interpretation, unless an algorithmic step, called reconstruction, is introduced. Up to the last decade, this reconstruction was performed by algorithms of moderate ...
EPFL2012Orthogonal Filtered Recoupled-STOCSY to Extract Metabolic Networks Associated with Minor Perturbations from NMR Spectroscopy
Supervised multivariate statistical analyses of NMR spectroscopic data sets are often required to identify metabolic differences between sample classes, and 20 the use of orthogonal filters has proven to be highly efficient even when dealing with weak pert ...
AMER CHEMICAL SOC2011On the Hilbert Transform of Wavelets
Michaël Unser, Kunal Narayan Chaudhury
A wavelet is a localized function having a prescribed number of vanishing moments. In this correspondence, we provide precise arguments as to why the Hilbert transform of a wavelet is again a wavelet. In particular, we provide sharp estimates of the locali ...
IEEE2011Steerable Pyramids and Tight Wavelet Frames in L_2(R^d)
Michaël Unser, Dimitri Nestor Alice Van De Ville
We present a functional framework for the design of tight steerable wavelet frames in any number of dimensions. The 2-D version of the method can be viewed as a generalization of Simoncelli's steerable pyramid that gives access to a larger palette of steer ...
Institute of Electrical and Electronics Engineers2011