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- Bob L. Sturm, Marcela Morvidone, Laurent Daudet
- 2010 18th European Signal Processing Conference
- 2010

We investigate the benefits of evaluating Mel-frequency cepstral coefficients (MFCCs) over several time scales in the context of automatic musical instrument identification for signals that are monophonic but derived from real musical settings. We define several sets of features derived from MFCCs computed using multiple time resolutions, and compare their… (More)

- Marcela Morvidone, Bob L. Sturm, Laurent Daudet
- Pattern Recognition Letters
- 2010

We present two sets of novel features that combine multiscale representations of signals with the compact timbral description of Mel-frequency cepstral coefficients (MFCCs). We define one set of features, OverCs, from overcomplete transforms at multiple scales. We define the second set of features, SparCs, from a signal model found by sparse approximation.… (More)

- Marcela Morvidone, Bruno Torrésani
- IJWMIP
- 2003

- Marcela Morvidone, Maï K. Nguyen, Tuong T. Truong, Habib Zaidi
- Int. J. Biomedical Imaging
- 2010

Radon transforms defined on smooth curves are well known and extensively studied in the literature. In this paper, we consider a Radon transform defined on a discontinuous curve formed by a pair of half-lines forming the vertical letter V. If the classical two-dimensional Radon transform has served as a work horse for tomographic transmission and/or… (More)

- Marcela Morvidone, Tuong T. Truong, Maï K. Nguyen, Habib Zaidi
- 2010 IEEE International Conference on Image…
- 2010

Conventional tomographies (e.g. X-ray scanner, Positron Emission Tomography), functioning on primary radiation are modeled by the Radon transform (RT) which is an integral transform defined on straight lines. In this paper, we consider a new RT defined on a pair of half-lines forming a letter V, which arises from modeling two-dimensional emission imaging… (More)

- Maï K. Nguyen, Tuong T. Truong, Marcela Morvidone, Habib Zaidi
- Int. J. Biomedical Imaging
- 2011

Imaging processes built on the Compton scattering effect have been under continuing investigation since it was first suggested in the 50s. However, despite many innovative contributions, there are still formidable theoretical and technical challenges to overcome. In this paper, we review the state-of-the-art principles of the so-called scattered radiation… (More)

We obtain estimates for the distribution of values of functions Íll the weighted BMOq, spaces, BMO�(R), that let us find equivalent norms. It is also obtained that a suitable redefinition of the HilbeÍt transform is a bounded operator from these spaces into themselves. This is achieved for a certain cIass of weights w.

- Marcela Morvidone
- IJWMIP
- 2010

We study local deformations of time-frequency and timescale representations, in the framework of the so-called reassignment methods, which aim at deblurringg time-frequency representations. We focus on deformations generated by appropriate vector elds deened on time-frequency or time scale plane, and constructed on the basis of geometric and… (More)

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