The objective of this project is the study of Shape from Shading (SfS) problem in a variational framework. Among the other shape recovery methods, SfS is employed to obtain three-dimensional shape using spatial variations of brightness in an image. In this study, SfS problem will be addressed as an energy minimization problem. A constraint which establishes a connection between intensity gradie...

Synovial fibroblasts (SFs) have become a major target for ex vivo gene transfer in rheumatoid arthritis (RA), but efficient transduction of RA-SFs still is a major problem. The low proliferation rate and heterogeneity of RA-SFs, together with their lack of highly specific surface receptors, have hampered a more extensive application of this technique. Improving transduction protocols with conve...

The ability of the site-frequency spectrum (SFS) to reflect the particularities of gene genealogies exhibiting multiple mergers of ancestral lines as opposed to those obtained in the presence of population growth is our focus. An excess of singletons is a well-known characteristic of both population growth and multiple mergers. Other aspects of the SFS, in particular, the weight of the right ta...

In this work, we describe an original method of solving the shape from shading (SFS) problem, which relies on the marriage of two simple ideas. On the one hand, we propose to modelize the scene by a parametric surface, namely a 3D-spline. The key advantage is that boundary conditions are no longer required to render the problem well-posed. On the other hand, we introduce the concept of ‘‘useful...

Effect of stretching and bending on the measured tension The method proposed in this study measures the displacement of individual SFs by applying an external force perpendicular to the fiber axis. Although the method enables us to measure tensions, it also generates other undesired forces in the SFs due to phenomena such as stretching and bending. Here, we estimate the stretching and bending f...

SPAR (Speech-Pattern Algorithms and Representations) is the name given to the consortium of University College London, Imperial College, GEC Hirst Research Centre, Plessey Research and Leeds University funded under Alvey Project MMI-09. The project is concerned with advanced speech analysis algorithms, and from the outset saw the need for a system for speech data management. The SPAR Speech Fil...

We present an exact, closed expression for the expected neutral Site Frequency Spectrum for two neutral sites, 2-SFS, without recombination. This spectrum is the immediate extension of the well known single site θ/f neutral SFS. Similar formulae are also provided for the case of the expected SFS of sites that are linked to a focal neutral mutation of known frequency. Formulae for finite samples...

SUMMARY Although the popularity of longitudinal brachioplasty has grown tremendously in recent years, dealing with the unpredictable scar remains a challenge for the surgeon and the patient. The scar often heals slowly and widens over time, perpetuated by the effects of gravity, body movements, and the thin nature of the superficial fascial system (SFS) of the arm. Scar widening may correlate w...

Geometrical reconstruction from multiple cameras can now concurrence classical reconstruction. Shape From Silhouette (SFS)[4] is a method that estimates the Visual Hull, in real time from observed silhouette in each view. Despite the fact that SFS is really simple and robust, it produces ghost parts : a set of 3D points that does not belong to real objects. These parts can significantly disturb...

In this paper, we demonstrate the use of shape-from-shading (SfS) to improve both the quality and the robustness of 3D reconstruction of dynamic objects captured by a single camera. Unlike previous approaches that made use of SfS as a post-processing step, we offer a principled integrated approach that solves dynamic object tracking and reconstruction and SfS as a single unified cost function. ...