Philippe Thévenaz

Cette personne a quitté l’EPFL

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Publications associées (30)

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Spectral Signal-to-Noise Ratio and Resolution Assessment of 3D Reconstructions

Michaël Unser, Philippe Thévenaz

Measuring the quality of three-dimensional (3D) reconstructed biological macromolecules by transmission electron microscopy is still an open problem. In this article, we extend the applicability of the spectral signal-to-noise ratio (SSNR) to the evaluatio ...

Elsevier2005

Short basis functions for constant-variance interpolation

Michaël Unser, Thierry Blu, Philippe Thévenaz

An interpolation model is a necessary ingredient of intensity-based registration methods. The properties of such a model depend entirely on its basis function, which has been traditionally characterized by features such as its order of approximation and it ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2008

A Strategy Based on Maximum Spanning Trees to Stitch Together Microscope Images

Michaël Unser, Philippe Thévenaz

Assembling partial views is an attractive means to extend the field of view of microscope images. In this paper, we propose a semi-automated solution to achieve this goal. Its intended audience is the microscopist who desires to scan a large area while acq ...

SPIE2006

Snakes With an Ellipse-Reproducing Property

Michaël Unser, Philippe Thévenaz, Ricard Delgado Gonzalo, Chandra Sekhar Seelamantula

We present a new class of continuously defined parametric snakes using a special kind of exponential splines as basis functions. We have enforced our bases to have the shortest possible support subject to some design constraints to maximize efficiency. Whi ...

IEEE2012

Halton Sampling for Image Registration Based on Mutual Information

Michel Bierlaire, Michaël Unser, Philippe Thévenaz

Mutual information is a widely used similarity measure for aligning multimodal medical images. At its core it relies on the computation of a discrete joint histogram, which itself requires image samples for its estimation. In this paper we study the influe ...

Sampling Publishing2008

MOMS-based Programmable Sampling Rate Converters

Philippe Thévenaz

In this paper design options when implementing programmable sampling rate converters are discussed. The theory and performance of the classical and new converters based on maximum order and minimum support (MOMS) splines is presented. FPGA designs are show ...

2009

The Ovuscule

Michaël Unser, Ricard Delgado Gonzalo, Philippe Thévenaz

We propose an active contour (a.k.a. snake) that takes the shape of an ellipse. Its evolution is driven by surface terms made of two contributions: the integral of the data over an inner ellipse, counterbalanced by the integral of the data over an outer el ...

IEEE2011

Elastic Image Registration of 2-D Gels for Differential and Repeatability Studies

Michaël Unser, Philippe Thévenaz

One of the main applications of electrophoretic 2-D gels is the analysis of differential responses between different conditions. For this reason, specific spots are present in one of the images, but not in the other. In some other occasions, the same exper ...

Wiley InterScience2008

The Snakuscule

Michaël Unser, Philippe Thévenaz

Traditional snakes, or active contours, are planar parametric curves. Their parameters are determined by optimizing the weighted sum of three energy terms: one depending on the data (typically on the integral of its gradient under the curve, or on its inte ...

IEEE2006

Elastic Image Registration with Applications to Proteomics

Michaël Unser, Philippe Thévenaz

2006