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107 results on '"Pardàs, Montse"'

1. Hybridnet for depth estimation and semantic segmentation

Author

Sánchez-Escobedo, Dalila, Lin, Xiao, Casas, Josep R., and Pardàs, Montse

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Semantic segmentation and depth estimation are two important tasks in the area of image processing. Traditionally, these two tasks are addressed in an independent manner. However, for those applications where geometric and semantic information is required, such as robotics or autonomous navigation,depth or semantic segmentation alone are not sufficient. In this paper, depth estimation and semantic segmentation are addressed together from a single input image through a hybrid convolutional network. Different from the state of the art methods where features are extracted by a sole feature extraction network for both tasks, the proposed HybridNet improves the features extraction by separating the relevant features for one task from those which are relevant for both. Experimental results demonstrate that HybridNet results are comparable with the state of the art methods, as well as the single task methods that HybridNet is based on., Comment: 2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2018

Published
2024
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2. Color Deconvolution applied to Domain Adaptation in HER2 histopathological images

Author

Anglada-Rotger, David, Marqués, Ferran, and Pardàs, Montse

Subjects
Electrical Engineering and Systems Science - Image and Video Processing, Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning
Abstract

Breast cancer early detection is crucial for improving patient outcomes. The Institut Catal\`a de la Salut (ICS) has launched the DigiPatICS project to develop and implement artificial intelligence algorithms to assist with the diagnosis of cancer. In this paper, we propose a new approach for facing the color normalization problem in HER2-stained histopathological images of breast cancer tissue, posed as an style transfer problem. We combine the Color Deconvolution technique with the Pix2Pix GAN network to present a novel approach to correct the color variations between different HER2 stain brands. Our approach focuses on maintaining the HER2 score of the cells in the transformed images, which is crucial for the HER2 analysis. Results demonstrate that our final model outperforms the state-of-the-art image style transfer methods in maintaining the cell classes in the transformed images and is as effective as them in generating realistic images.

Published
2023

3. Graph based Dynamic Segmentation of Generic Objects in 3D

Author

Lin, Xiao, Casas, Josep R., and Pardàs, Montse

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

We propose a novel 3D segmentation method for RBGD stream data to deal with 3D object segmentation task in a generic scenario with frequent object interactions. It mainly contributes in two aspects, while being generic and not requiring initialization: firstly, a novel tree structure representation for the point cloud of the scene is proposed. Then, a dynamic manangement mechanism for connected component splits and merges exploits the tree structure representation., Comment: CVPR 2016 workshops - SUNw: Scene Understanding Workshop 2016 See workshop listing in http://cvpr2016.thecvf.com/program/workshops and paper listing in http://sunw.csail.mit.edu/2016/posters.html)

Published
2019

5. Time Consistent Estimation of End-Effectors from RGB-D Data

Author

Lin, Xiao, Casas, Josep R., Pardás, Montse, 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, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Bräunl, Thomas, editor, McCane, Brendan, editor, Rivera, Mariano, editor, and Yu, Xinguo, editor

Published
2016
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6. 3D Point Cloud Video Segmentation Based on Interaction Analysis

Author

Lin, Xiao, Casas, Josep R., Pardàs, Montse, 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, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Hua, Gang, editor, and Jégou, Hervé, editor

Published
2016
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7. Foreground Objects Segmentation for Moving Camera Scenarios Based on SCGMM

Author

Gallego, Jaime, Pardàs, Montse, Solano, Montse, 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, Salerno, Emanuele, editor, Çetin, A. Enis, editor, and Salvetti, Ovidio, editor

Published
2012
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8. Skeleton and Shape Adjustment and Tracking in Multicamera Environments

Author

Alcoverro, Marcel, Casas, Josep Ramon, Pardàs, Montse, 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, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Perales, Francisco J., editor, and Fisher, Robert B., editor

Published
2010
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9. Model-Based Hand Gesture Tracking in ToF Image Sequences

Author

Guðmundsson, Sigurjón Árni, Sveinsson, Jóhannes R., Pardàs, Montse, Aanæs, Henrik, Larsen, Rasmus, 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, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Perales, Francisco J., editor, and Fisher, Robert B., editor

Published
2010
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11. Activity Classification

Author

Nickel, Kai, Pardàs, Montse, Stiefelhagen, Rainer, Canton, Cristian, Landabaso, José Luis, Casas, Josep R., Karat, John, editor, Vanderdonckt, Jean, editor, Waibel, Alexander, editor, and Stiefelhagen, Rainer, editor

Published
2009
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12. Head Pose Detection Based on Fusion of Multiple Viewpoint Information

Author

Canton-Ferrer, Cristian, Casas, Josep Ramon, Pardàs, Montse, 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, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Stiefelhagen, Rainer, editor, and Garofolo, John, editor

Published
2007
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13. UPC Audio, Video and Multimodal Person Tracking Systems in the Clear Evaluation Campaign

Author

Abad, Alberto, Canton-Ferrer, Cristian, Segura, Carlos, Landabaso, José Luis, Macho, Dušan, Casas, Josep Ramon, Hernando, Javier, Pardàs, Montse, Nadeu, Climent, 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, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Stiefelhagen, Rainer, editor, and Garofolo, John, editor

Published
2007
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14. Foreground Regions Extraction and Characterization Towards Real-Time Object Tracking

Author

Landabaso, José Luis, Pardàs, Montse, 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, Renals, Steve, editor, and Bengio, Samy, editor

Published
2006
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15. Towards a Bayesian Approach to Robust Finding Correspondences in Multiple View Geometry Environments

Author

Canton-Ferrer, Cristian, Casas, Josep R., Pardàs, Montse, 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, Sunderam, Vaidy S., editor, van Albada, Geert Dick, editor, Sloot, Peter M. A., editor, and Dongarra, Jack J., editor

Published
2005
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16. Robust Tracking and Object Classification Towards Automated Video Surveillance

Author

Landabaso, Jose-Luis, Xu, Li-Qun, Pardas, Montse, 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, Campilho, Aurélio, editor, and Kamel, Mohamed, editor

Published
2004
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35. Graph based Dynamic Segmentation of Generic Objects in 3D

Author

Lin, Xiao, Casas, Josep R., and Pardàs, Montse

Subjects
FOS: Computer and information sciences, Computer Vision and Pattern Recognition (cs.CV), Computer Science - Computer Vision and Pattern Recognition
Abstract

We propose a novel 3D segmentation method for RBGD stream data to deal with 3D object segmentation task in a generic scenario with frequent object interactions. It mainly contributes in two aspects, while being generic and not requiring initialization: firstly, a novel tree structure representation for the point cloud of the scene is proposed. Then, a dynamic manangement mechanism for connected component splits and merges exploits the tree structure representation., Comment: CVPR 2016 workshops - SUNw: Scene Understanding Workshop 2016 See workshop listing in http://cvpr2016.thecvf.com/program/workshops and paper listing in http://sunw.csail.mit.edu/2016/posters.html)

Published
2016
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39. TOF Imaging in Smart Room Environments towards Improved People Tracking

Author

Guðmundsson, Sigurjón Árni, Larsen, Rasmus, Aanæs, Henrik, Casas, Josep Ramon, Pardàs, Montse, Guðmundsson, Sigurjón Árni, Larsen, Rasmus, Aanæs, Henrik, Casas, Josep Ramon, and Pardàs, Montse

Abstract

In this Paper we present the use of Time-of-Flight (TOF) cameras in Smart-rooms and how this leads to improved results in segmenting the people in the room from the background and consequently better 3D reconstruction of the people. A calibrated rig of one Swissranger SR3100 Time-of-flight range camera and a high resolution standard camera is set in a smart-room consisting of 5 other standard cameras. A probabilistic background model is used to segment each view and a shape from silhouette 3D volume is constructed. It is shown that the presence of the range camera gives ways of eliminating regional artifacts and therefore a more robust input for higher level applications such people tracking or human motion analysis.

Published
2008

42. Flexible test-bed for unusual behavior detection

Author

Petrás, István, primary, Beleznai, Csaba, additional, Dedeoğlu, Yiğithan, additional, Pardàs, Montse, additional, Kovács, Levente, additional, Szlávik, Zoltán, additional, Havasi, László, additional, Szirányi, Tamás, additional, Töreyin, B. Uğur, additional, Güdükbay, Uğur, additional, Çetin, A. Enis, additional, and Canton-Ferrer, Cristian, additional

Published
2007
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43. Model-Based Hand Gesture Tracking in ToF Image Sequences.

Author

Gu∂mundsson, Sigurjón Árni, Sveinsson, Jóhannes R., Pardàs, Montse, Aanæs, Henrik, and Larsen, Rasmus

Abstract

This paper presents a Time-of-Flight (ToF) camera based system for hand motion and gesture tracking. A 27 degree of freedom (DOF) hand model is constructed and fleshed out by ellipsoids. This allows the synthesis of range images of the model through projective geometry. The hand pose is then tracked with a particle filter by statistically measuring the hypothetical pose against the ToF input image; where the inside/outside alignment of the hand pixels and the depth differences serve as classifying metrics. The high DOF tracking problem for the particle filter is addressed by reducing the high dimensionality of the joint angle space to a low dimensional space via Principal Component Analysis (PCA). The basis vectors are learned from a few basic model configurations and the transformations between these poses. This results in a system capable of practical hand tracking in a restricted gesture configuration space. [ABSTRACT FROM AUTHOR]

Published
2010
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44. Head Pose Detection Based on Fusion of Multiple Viewpoint Information.

Author

Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Rangan, C. Pandu, Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Stiefelhagen, Rainer, Garofolo, John, Canton-Ferrer, Cristian, Casas, Josep Ramon, and Pardàs, Montse

Abstract

This paper presents a novel approach to the problem of determining head pose estimation and face 3D orientation of several people in low resolution sequences from multiple calibrated cameras. Spatial redundancy is exploited and the head in the scene is detected and geometrically approximated by an ellipsoid. Skin patches from each detected head are located in each camera view. Data fusion is performed by back-projecting skin patches from single images onto the estimated 3D head model, thus providing a synthetic reconstruction of the head appearance. Finally, these data are processed in a pattern analysis framework thus giving an estimation of face orientation. Tracking over time is performed by Kalman filtering. Results of the proposed algorithm are provided in the SmartRoom scenario of the CLEAR Evaluation. [ABSTRACT FROM AUTHOR]

Published
2007
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46. Foreground Regions Extraction and Characterization Towards Real-Time Object Tracking.

Author

Renals, Steve, Bengio, Samy, Landabaso, José Luis, and Pardàs, Montse

Abstract

Object localization and tracking are key issues in the analysis of scenes for video surveillance or scene understanding applications. This paper presents a contribution to the object tracking task in indoor environments surveyed by multiple fixed cameras. The method proposed uses a foreground separation process at each camera view. Then, a 3D-foreground scene is modeled and discretized into voxels making use of all the segmented views, preventing the difficulties of inter-object occlusions in 2D trackers, and increasing the robustness for not having to rely only in one view. The voxels are grouped into meaningful blobs, whose colors are modeled for tracking purposes, using a novel voxel-coloring technique that considers possible inter/intra-object occlusions. Finally, color information together with other characteristic features of 3D object appearances are temporally tracked using a template-based technique which takes into account all the features simultaneously in accordance with their respective variances. Extensive experiments dealing with several hours of video sequences in real-world scenarios have been conducted, showing a very promising performance. [ABSTRACT FROM AUTHOR]

Published
2006
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47. Towards a Bayesian Approach to Robust Finding Correspondences in Multiple View Geometry Environments.

Author

Sunderam, Vaidy S., Albada, Geert Dick, Sloot, Peter M. A., Dongarra, Jack J., Canton-Ferrer, Cristian, Casas, Josep R., and Pardàs, Montse

Abstract

This paper presents a new Bayesian approach to the problem of finding correspondences of moving objects in a multiple calibrated camera environment. Moving objects are detected and segmented in multiple cameras using a background learning technique. A Point Based Feature (PBF) of each foreground region is extracted, in our case, the top. This features will be the support to establish the correspondences. A reliable, efficient and fast computable distance, the symmetric epipolar distance, is proposed to measure the closeness of sets of points belonging to different views. Finally, matching the features from different cameras originating from the same object is achieved by selecting the most likely PBF in each view under a Bayesian framework. Results are provided showing the effectiveness of the proposed algorithm even in case of severe occlusions or with incorrectly segmented foreground regions. [ABSTRACT FROM AUTHOR]

Published
2005
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