Search

Your search keyword '"Bascle, Bénédicte"' showing total 17 results
Start Over Author "Bascle, Bénédicte"

Refine your results

more »

17 results on '"Bascle, Bénédicte"'

1. Leveraging edge detection and neural networks for better UAV localization

Author

Di Piazza, Theo, Meinhardt-Llopis, Enric, Facciolo, Gabriele, Bascle, Benedicte, Abgrall, Corentin, and Devaux, Jean-Clement

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

We propose a novel method for geolocalizing Unmanned Aerial Vehicles (UAVs) in environments lacking Global Navigation Satellite Systems (GNSS). Current state-of-the-art techniques employ an offline-trained encoder to generate a vector representation (embedding) of the UAV's current view, which is then compared with pre-computed embeddings of geo-referenced images to determine the UAV's position. Here, we demonstrate that the performance of these methods can be significantly enhanced by preprocessing the images to extract their edges, which exhibit robustness to seasonal and illumination variations. Furthermore, we establish that utilizing edges enhances resilience to orientation and altitude inaccuracies. Additionally, we introduce a confidence criterion for localization. Our findings are substantiated through synthetic experiments., Comment: Accepted for publication in IGARSS2024. 4 pages, 3 figures, 3 tables

Published
2024

2. Improving neural implicit surfaces geometry with patch warping

Author

Darmon, François, Bascle, Bénédicte, Devaux, Jean-Clément, Monasse, Pascal, and Aubry, Mathieu

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Neural implicit surfaces have become an important technique for multi-view 3D reconstruction but their accuracy remains limited. In this paper, we argue that this comes from the difficulty to learn and render high frequency textures with neural networks. We thus propose to add to the standard neural rendering optimization a direct photo-consistency term across the different views. Intuitively, we optimize the implicit geometry so that it warps views on each other in a consistent way. We demonstrate that two elements are key to the success of such an approach: (i) warping entire patches, using the predicted occupancy and normals of the 3D points along each ray, and measuring their similarity with a robust structural similarity (SSIM); (ii) handling visibility and occlusion in such a way that incorrect warps are not given too much importance while encouraging a reconstruction as complete as possible. We evaluate our approach, dubbed NeuralWarp, on the standard DTU and EPFL benchmarks and show it outperforms state of the art unsupervised implicit surfaces reconstructions by over 20% on both datasets., Comment: Accepted at CVPR2022. Project wepbage: http://imagine.enpc.fr/~darmonf/

Published
2021

3. Deep Multi-View Stereo gone wild

Author

Darmon, François, Bascle, Bénédicte, Devaux, Jean-Clément, Monasse, Pascal, and Aubry, Mathieu

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Deep multi-view stereo (MVS) methods have been developed and extensively compared on simple datasets, where they now outperform classical approaches. In this paper, we ask whether the conclusions reached in controlled scenarios are still valid when working with Internet photo collections. We propose a methodology for evaluation and explore the influence of three aspects of deep MVS methods: network architecture, training data, and supervision. We make several key observations, which we extensively validate quantitatively and qualitatively, both for depth prediction and complete 3D reconstructions. First, complex unsupervised approaches cannot train on data in the wild. Our new approach makes it possible with three key elements: upsampling the output, softmin based aggregation and a single reconstruction loss. Second, supervised deep depthmap-based MVS methods are state-of-the art for reconstruction of few internet images. Finally, our evaluation provides very different results than usual ones. This shows that evaluation in uncontrolled scenarios is important for new architectures., Comment: Accepted to 3DV2021

Published
2021
Full Text
View/download PDF

4. Expression Mimicking : From 2D Monocular Sequences to 3D Animations

Author

Ghys, Charlotte, Taron, Maxime, Paragios, Nikos, Komodakis, Nikos, Bascle, Bénédicte, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bebis, George, editor, Boyle, Richard, editor, Parvin, Bahram, editor, Koracin, Darko, editor, Paragios, Nikos, editor, Tanveer, Syeda-Mahmood, editor, Ju, Tao, editor, Liu, Zicheng, editor, Coquillart, Sabine, editor, Cruz-Neira, Carolina, editor, Müller, Torsten, editor, and Malzbender, Tom, editor

Published
2007
Full Text
View/download PDF

5. Graph-Based Multi-resolution Temporal-Based Face Reconstruction

Author

Ghys, Charlotte, Paragios, Nikos, Bascle, Bénédicte, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bebis, George, editor, Boyle, Richard, editor, Parvin, Bahram, editor, Koracin, Darko, editor, Remagnino, Paolo, editor, Nefian, Ara, editor, Meenakshisundaram, Gopi, editor, Pascucci, Valerio, editor, Zara, Jiri, editor, Molineros, Jose, editor, Theisel, Holger, editor, and Malzbender, Tom, editor

Published
2006
Full Text
View/download PDF

6. Understanding 3D Emotions Through Compact Anthropometric Autoregressive Models

Author

Ghys, Charlotte, Paragios, Nikos, Bascle, Bénédicte, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Bebis, George, editor, Boyle, Richard, editor, Parvin, Bahram, editor, Koracin, Darko, editor, Remagnino, Paolo, editor, Nefian, Ara, editor, Meenakshisundaram, Gopi, editor, Pascucci, Valerio, editor, Zara, Jiri, editor, Molineros, Jose, editor, Theisel, Holger, editor, and Malzbender, Tom, editor

Published
2006
Full Text
View/download PDF

7. Illumination-Invariant Color Image Correction

Author

Bascle, Benedicte, Bernier, Olivier, Lemaire, Vincent, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zheng, Nanning, editor, Jiang, Xiaoyi, editor, and Lan, Xuguang, editor

Published
2006
Full Text
View/download PDF

8. Tracking Body Parts of Multiple People for Multi-person Multimodal Interface

Author

Carbini, Sébastien, Viallet, Jean-Emmanuel, Bernier, Olivier, Bascle, Bénédicte, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Sebe, Nicu, editor, Lew, Michael, editor, and Huang, Thomas S., editor

Published
2005
Full Text
View/download PDF

9. Parametric and Non-parametric Methods for Linear Extraction

Author

Bascle, Benedicte, Gao, Xiang, Ramesh, Visvanathan, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Dough, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Comaniciu, Dorin, editor, Mester, Rudolf, editor, Kanatani, Kenichi, editor, and Suter, David, editor

Published
2004
Full Text
View/download PDF

15. Graph-Based Multi-resolution Temporal-Based Face Reconstruction.

Author

Bebis, George, Boyle, Richard, Parvin, Bahram, Koracin, Darko, Remagnino, Paolo, Nefian, Ara, Meenakshisundaram, Gopi, Pascucci, Valerio, Zara, Jiri, Molineros, Jose, Theisel, Holger, Malzbender, Thomas, Ghys, Charlotte, Paragios, Nikos, and Bascle, Bénédicte

Abstract

Reproducing high quality facial expressions is an important challenge in human-computer interaction. Laser-scanners offer an expensive solution to such a problem with image based alternatives being a low-resolution alternative. In this paper, we propose a new method for stereo reconstruction from multiple video pairs that is capable of producing high resolution facial models. To this end, a combinatorial optimization approach is considered and is coupled in time to produce high resolution depth maps. Such optimization is addressed with the use of graph-cuts leading to precise reconstruction of facial expressions that can then be used for animation. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

16. Understanding 3D Emotions Through Compact Anthropometric Autoregressive Models.

Author

Bebis, George, Boyle, Richard, Parvin, Bahram, Koracin, Darko, Remagnino, Paolo, Nefian, Ara, Meenakshisundaram, Gopi, Pascucci, Valerio, Zara, Jiri, Molineros, Jose, Theisel, Holger, Malzbender, Thomas, Ghys, Charlotte, Paragios, Nikos, and Bascle, Bénédicte

Abstract

Reproducing realistic facial expressions is an important challenge in human computer interaction. In this paper we propose a novel method of modeling and recovering the transitions between different expressions through the use of an autoregressive process. In order to account for computational complexity, we adopt a compact face representation inspired from MPEG-4 standards while in terms of expressions a well known Facial Action Unit System (FACS) comprising the six dominant ones is considered. Then, transitions between expressions are modeled through a time series according to a linear model. Explicit constraints driven from face anthropometry and points interaction are inherited in this model and minimize the risk of producing non-realistic configurations. Towards optimal animation performance, a particular hardware architecture is used to provide the 3D depth information of the corresponding facial elements during the learning stage and the Random Sampling Consensus algorithm for the robust estimation of the model parameters. Promising experimental results demonstrate the potential of such an approach. [ABSTRACT FROM AUTHOR]

Published
2006
Full Text
View/download PDF

17. Tracking Body Parts of Multiple People for Multi-person Multimodal Interface.

Author

Sebe, Nicu, Lew, Michael S., Huang, Thomas S., Carbini, Sébastien, Viallet, Jean-Emmanuel, Bernier, Olivier, and Bascle, Bénédicte

Abstract

Although large displays could allow several users to work together and to move freely in a room, their associated interfaces are limited to contact devices that must generally be shared. This paper describes a novel interface called SHIVA (Several-Humans Interface with Vision and Audio) allowing several users to interact remotely with a very large display using both speech and gesture. The head and both hands of two users are tracked in real time by a stereo vision based system. From the body parts position, the direction pointed by each user is computed and selection gestures done with the second hand are recognized. Pointing gesture is fused with n-best results from speech recognition taking into account the application context. The system is tested on a chess game with two users playing on a very large display. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results