Concept
Transformée de Hadamard
Publications associées (52)
Higher-Order Riesz Transforms And Steerable Wavelet Frames
Michaël Unser, Dimitri Nestor Alice Van De Ville
We introduce an Nth-order extension of the Riesz transform in d dimensions. We prove that this generalized transform has the following remarkable properties: shift-invariance, scale-invariance, inner-product preservation, and steerability. The pleasing con ...
Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2009A Multi-stage Secret Sharing Scheme Using All-or-Nothing Transform Approach
A multi-stage secret sharing (MSS) scheme is a method of sharing a number of secrets among a set of participants, such that any authorized subset of participants could recover one secret in every stage. The first MSS scheme was proposed by He and Dawson in ...
Springer Verlag2009Gabor Wavelet Analysis and the Fractional Hilbert Transform
Michaël Unser, Kunal Narayan Chaudhury
We propose an amplitude-phase representation of the dual-tree complex wavelet transform (DT-ℂWT) which provides an intuitive interpretation of the associated complex wavelet coefficients. The representation, in particular, is based on the shifting action o ...
SPIE2009Two-dimensional magnetic resonance force microscopy using full-volume Fourier and Hadamard encoding
Jürgen Brugger, Giovanni Boero, Schahrazede-Lila Mouaziz
A rapid acquisition method for two-dimensional (2D) magnetic resonance force microscopy images is described. Spatial resolution is based on gradients in the static magnetic field B0 and in the applied radiofrequency field B1. Hadamard- and Fourier-encoding ...
2008Time-resolved Hadamard fluorescence imaging
We present a new concept for fluorescence lifetime imaging (FLIM) based on time-resolved Hadamard imaging (HI). HI allows image acquisition by use of one single-point detector without requiring a moving scanning stage. Moreover, it reduces the influence of ...
2005