Person
Virginia Estellers Casas
This person is no longer with EPFL
Related publications (13)
Harmonic Active Contours
Jean-Philippe Thiran, Xavier Bresson, Dominique Zosso, Virginia Estellers Casas
We propose a segmentation method based on the geometric representation of images as two-dimensional manifolds embedded in a higher dimensional space. The segmentation is formulated as a minimization problem, where the contours are described by a level set ...
Institute of Electrical and Electronics Engineers2014Surface reconstruction from microscopic images in optical lithography
Jean-Philippe Thiran, Virginia Estellers Casas, Maria Gabrani
We propose a shape-from-shading method to reconstruct surfaces of silicon wafers from images of printed circuits taken with scanning electron microscope. Our method combines the physical model of the optical acquisition system with prior knowledge about th ...
Institute of Electrical and Electronics Engineers2014Surface Reconstruction From Microscopic Images in Optical Lithography
Jean-Philippe Thiran, Virginia Estellers Casas, Maria Gabrani
This paper presents a method to reconstruct 3D surfaces of silicon wafers from 2D images of printed circuits taken with a scanning electron microscope. Our reconstruction method combines the physical model of the optical acquisition system with prior knowl ...
Ieee-Inst Electrical Electronics Engineers Inc2014LAYOUT ASSESSMENT METHOD AND SYSTEM
Frank Grégoire Jean de Morsier, Virginia Estellers Casas, Nathalie Casati, Maria Gabrani
Candidate layout patterns can be assessed using a sparse pattern dictionary of known design layout patterns by determining sparse coefficients for each candidate pattern, reconstructing the respective candidate pattern, and determining reconstruction error ...
U.S. Patent and Trademark Office; U.S. DEPARTMENT OF COMMERCE2013Geometric Variational Models for Inverse Problems in Imaging
This dissertation develops geometric variational models for different inverse problems in imaging that are ill-posed, designing at the same time efficient numerical algorithms to compute their solutions. Variational methods solve inverse problems by the fo ...
EPFL2013Enhanced Compressed Sensing Recovery with Level Set Normals
Jean-Philippe Thiran, Xavier Bresson, Virginia Estellers Casas
We propose a compressive sensing algorithm that exploits geometric properties of images to recover images of high quality from few measurements. The image reconstruction is done by iterating the two following steps: 1) estimation of normal vectors of the i ...
2013On dynamic stream weighting for Audio-Visual Speech Recognition
Jean-Philippe Thiran, Mihai Gurban, Virginia Estellers Casas
The integration of audio and visual information improves speech recognition performance, specially in the presence of noise. In these circumstances it is necessary to introduce audio and visual weights to control the contribution of each modality to the re ...
2012An Efficient Algorithm for Level Set Method Preserving Distance Function
Jean-Philippe Thiran, Xavier Bresson, Dominique Zosso, Virginia Estellers Casas
The level set method is a popular technique for tracking moving interfaces in several disciplines including computer vision and fluid dynamics. However, despite its high flexibility, the original level set method is limited by two important numerical issue ...
Institute of Electrical and Electronics Engineers2012Multi-pose lipreading and audio-visual speech recognition
Jean-Philippe Thiran, Virginia Estellers Casas
In this article, we study the adaptation of visual and audio-visual speech recognition systems to non-ideal visual conditions. We focus on overcoming the effects of a changing pose of the speaker, a problem encountered in natural situations where the speak ...
2012Harmonic Active Contours for multichannel image segmentation
Jean-Philippe Thiran, Xavier Bresson, Dominique Zosso, Virginia Estellers Casas
We propose a segmentation method based on the geometric representation of images as surfaces embedded in a higher dimensional space, handling naturally multichannel images. The segmentation is based on an active contour embedded in the image manifold, alon ...
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