1 code implementation • 8 Feb 2022 • Antoine Wehenkel, Jens Behrmann, Hsiang Hsu, Guillermo Sapiro, Gilles Louppe, Jörn-Henrik Jacobsen
Hybrid modelling reduces the misspecification of expert models by combining them with machine learning (ML) components learned from data.
no code implementations • 20 Jan 2022 • Afroditi Papadaki, Natalia Martinez, Martin Bertran, Guillermo Sapiro, Miguel Rodrigues
Federated learning is an increasingly popular paradigm that enables a large number of entities to collaboratively learn better models.
no code implementations • 5 Oct 2021 • Afroditi Papadaki, Natalia Martinez, Martin Bertran, Guillermo Sapiro, Miguel Rodrigues
Federated learning is an increasingly popular paradigm that enables a large number of entities to collaboratively learn better models.
no code implementations • 29 Sep 2021 • Ze Wang, Xiuyuan Cheng, Guillermo Sapiro, Qiang Qiu
In other words, a CNN is now reduced to layers of filter atoms, typically a few hundred of parameters per layer, with a common block of subspace coefficients shared across layers.
no code implementations • 24 Sep 2021 • William E. Carson IV, Dmitry Isaev, Samatha Major, Guillermo Sapiro, Geraldine Dawson, David Carlson
Second, we show this same model can be used to learn a disentangled representation of multimodal biomarkers that results in an increase in predictive performance.
1 code implementation • 30 Apr 2021 • Chenfei Wu, Lun Huang, Qianxi Zhang, Binyang Li, Lei Ji, Fan Yang, Guillermo Sapiro, Nan Duan
Generating videos from text is a challenging task due to its high computational requirements for training and infinite possible answers for evaluation.
Ranked #6 on
Text-to-Video Generation
on MSR-VTT
no code implementations • 1 Jan 2021 • Martin A Bertran, Guillermo Sapiro, Mariano Phielipp
Deep Reinforcement Learning (DRL) can distill behavioural policies from sensory input that solve complex tasks, however, the policies tend to be task-specific and sample inefficient, requiring a large number of interactions with the environment that may be costly or impractical for many real world applications.
no code implementations • 1 Jan 2021 • Natalia Martinez, Martin Bertran, Afroditi Papadaki, Miguel R. D. Rodrigues, Guillermo Sapiro
With the wide adoption of machine learning algorithms across various application domains, there is a growing interest in the fairness properties of such algorithms.
no code implementations • 5 Dec 2020 • Ze Wang, Sihao Ding, Ying Li, Jonas Fenn, Sohini Roychowdhury, Andreas Wallin, Lane Martin, Scott Ryvola, Guillermo Sapiro, Qiang Qiu
Point density varies significantly across such a long range, and different scanning patterns further diversify object representation in LiDAR.
no code implementations • NeurIPS 2020 • Martin Bertran, Natalia Martinez, Mariano Phielipp, Guillermo Sapiro
Agents trained via deep reinforcement learning (RL) routinely fail to generalize to unseen environments, even when these share the same underlying dynamics as the training levels.
no code implementations • 19 Nov 2020 • Haoyu Dong, Ze Wang, Qiang Qiu, Guillermo Sapiro
Image retrieval relies heavily on the quality of the data modeling and the distance measurement in the feature space.
1 code implementation • ICML 2020 • Natalia Martinez, Martin Bertran, Guillermo Sapiro
In this work we formulate and formally characterize group fairness as a multi-objective optimization problem, where each sensitive group risk is a separate objective.
1 code implementation • 2 Nov 2020 • Martin Bertran, Natalia Martinez, Mariano Phielipp, Guillermo Sapiro
Agents trained via deep reinforcement learning (RL) routinely fail to generalize to unseen environments, even when these share the same underlying dynamics as the training levels.
no code implementations • 4 Sep 2020 • Ze Wang, Xiuyuan Cheng, Guillermo Sapiro, Qiang Qiu
We then explicitly regularize CNN kernels by enforcing decomposed coefficients to be shared across sub-structures, while leaving each sub-structure only its own dictionary atoms, a few hundreds of parameters typically, which leads to dramatic model reductions.
no code implementations • 13 Jul 2020 • Raphaël Achddou, J. Matias di Martino, Guillermo Sapiro
Standard deep neural networks (DNNs) are commonly trained in an end-to-end fashion for specific tasks such as object recognition, face identification, or character recognition, among many examples.
no code implementations • 3 Apr 2020 • J. Matias Di Martino, Fernando Suzacq, Mauricio Delbracio, Qiang Qiu, Guillermo Sapiro
Active illumination is a prominent complement to enhance 2D face recognition and make it more robust, e. g., to spoofing attacks and low-light conditions.
no code implementations • 16 Nov 2019 • Natalia Martinez, Martin Bertran, Guillermo Sapiro
Common fairness definitions in machine learning focus on balancing notions of disparity and utility.
no code implementations • 23 Oct 2019 • Zhuoqing Chang, Matias Di Martino, Qiang Qiu, Steven Espinosa, Guillermo Sapiro
Traditional gaze estimation methods typically require explicit user calibration to achieve high accuracy.
no code implementations • 26 Sep 2019 • Ze Wang, Sihao Ding, Ying Li, Minming Zhao, Sohini Roychowdhury, Andreas Wallin, Guillermo Sapiro, Qiang Qiu
To the best of our knowledge, this paper is the first attempt to study cross-range LiDAR adaptation for object detection in point clouds.
no code implementations • NeurIPS 2020 • Ze Wang, Xiuyuan Cheng, Guillermo Sapiro, Qiang Qiu
In this paper, we consider domain-invariant deep learning by explicitly modeling domain shifts with only a small amount of domain-specific parameters in a Convolutional Neural Network (CNN).
no code implementations • 25 Sep 2019 • Ze Wang, Xiuyuan Cheng, Guillermo Sapiro, Qiang Qiu
Domain shifts are frequently encountered in real-world scenarios.
no code implementations • 25 Sep 2019 • Natalia Martinez, Martin Bertran, Guillermo Sapiro
Common fairness definitions in machine learning focus on balancing various notions of disparity and utility.
no code implementations • ICLR 2020 • Ze Wang, Xiuyuan Cheng, Guillermo Sapiro, Qiang Qiu
One of these questions is how to efficiently achieve proper diversity and sampling of the multi-mode data space.
no code implementations • 25 Sep 2019 • Wei Zhu, Qiang Qiu, Robert Calderbank, Guillermo Sapiro, Xiuyuan Cheng
Encoding the input scale information explicitly into the representation learned by a convolutional neural network (CNN) is beneficial for many vision tasks especially when dealing with multiscale input signals.
no code implementations • 24 Sep 2019 • Wei Zhu, Qiang Qiu, Robert Calderbank, Guillermo Sapiro, Xiuyuan Cheng
Encoding the scale information explicitly into the representation learned by a convolutional neural network (CNN) is beneficial for many computer vision tasks especially when dealing with multiscale inputs.
1 code implementation • CVPR 2020 • Gilad Cohen, Guillermo Sapiro, Raja Giryes
We use influence functions to measure the impact of every training sample on the validation set data.
1 code implementation • 26 Jun 2019 • Reuben R Shamir, Yuval Duchin, Jin-Young Kim, Guillermo Sapiro, Noam Harel
The DC and cDC for automatic STN segmentation were 0. 66 and 0. 80, respectively.
no code implementations • ICLR 2019 • Martin Bertran, Natalia Martinez, Afroditi Papadaki, Qiang Qiu, Miguel Rodrigues, Guillermo Sapiro
We study space-preserving transformations where the utility provider can use the same algorithm on original and sanitized data, a critical and novel attribute to help service providers accommodate varying privacy requirements with a single set of utility algorithms.
1 code implementation • 14 Feb 2019 • Natalia Martinez, Martin Bertran, Guillermo Sapiro, Hau-Tieng Wu
One way to avoid these constraints is using infrared cameras, allowing the monitoring of iHR under low light conditions.
1 code implementation • CVPR 2018 • José Lezama, Qiang Qiu, Pablo Musé, Guillermo Sapiro
Deep neural networks trained using a softmax layer at the top and the cross-entropy loss are ubiquitous tools for image classification.
no code implementations • 18 May 2018 • Martin Bertran, Natalia Martinez, Afroditi Papadaki, Qiang Qiu, Miguel Rodrigues, Guillermo Sapiro
As such, users and utility providers should collaborate in data privacy, a paradigm that has not yet been developed in the privacy research community.
no code implementations • ICLR 2019 • Wei Zhu, Qiang Qiu, Bao Wang, Jianfeng Lu, Guillermo Sapiro, Ingrid Daubechies
Deep neural networks (DNNs) typically have enough capacity to fit random data by brute force even when conventional data-dependent regularizations focusing on the geometry of the features are imposed.
no code implementations • 17 May 2018 • Gilad Cohen, Guillermo Sapiro, Raja Giryes
Moreover, the behavior of DNNs compared to the linear classifiers SVM and LR is quite the same on the training and test data regardless of whether the network generalizes.
no code implementations • ICLR 2019 • Xiuyuan Cheng, Qiang Qiu, Robert Calderbank, Guillermo Sapiro
Explicit encoding of group actions in deep features makes it possible for convolutional neural networks (CNNs) to handle global deformations of images, which is critical to success in many vision tasks.
no code implementations • 18 Apr 2018 • J. Matias Di Martino, Qiang Qiu, Trishul Nagenalli, Guillermo Sapiro
Spoofing attacks are a threat to modern face recognition systems.
1 code implementation • 15 Mar 2018 • Albert Gong, Qiang Qiu, Guillermo Sapiro
In this paper we introduce an ensemble method for convolutional neural network (CNN), called "virtual branching," which can be implemented with nearly no additional parameters and computation on top of standard CNNs.
1 code implementation • ICML 2018 • Qiang Qiu, Xiuyuan Cheng, Robert Calderbank, Guillermo Sapiro
In this paper, we suggest to decompose convolutional filters in CNN as a truncated expansion with pre-fixed bases, namely the Decomposed Convolutional Filters network (DCFNet), where the expansion coefficients remain learned from data.
1 code implementation • 5 Dec 2017 • José Lezama, Qiang Qiu, Pablo Musé, Guillermo Sapiro
Deep neural networks trained using a softmax layer at the top and the cross-entropy loss are ubiquitous tools for image classification.
no code implementations • ECCV 2018 • Qiang Qiu, Jose Lezama, Alex Bronstein, Guillermo Sapiro
In this paper, we introduce a random forest semantic hashing scheme that embeds tiny convolutional neural networks (CNN) into shallow random forests, with near-optimal information-theoretic code aggregation among trees.
no code implementations • CVPR 2018 • Wei Zhu, Qiang Qiu, Jiaji Huang, Robert Calderbank, Guillermo Sapiro, Ingrid Daubechies
To resolve this, we propose a new framework, the Low-Dimensional-Manifold-regularized neural Network (LDMNet), which incorporates a feature regularization method that focuses on the geometry of both the input data and the output features.
1 code implementation • CVPR 2017 • Shuochen Su, Mauricio Delbracio, Jue Wang, Guillermo Sapiro, Wolfgang Heidrich, Oliver Wang
We show that the features learned from this dataset extend to deblurring motion blur that arises due to camera shake in a wide range of videos, and compare the quality of results to a number of other baselines.
no code implementations • 23 May 2017 • Jure Sokolic, Qiang Qiu, Miguel R. D. Rodrigues, Guillermo Sapiro
Confronted with this challenge, in this paper we open a new line of research, where the security, privacy, and fairness is learned and used in a closed environment.
1 code implementation • 25 Nov 2016 • Shuochen Su, Mauricio Delbracio, Jue Wang, Guillermo Sapiro, Wolfgang Heidrich, Oliver Wang
We show that the features learned from this dataset extend to deblurring motion blur that arises due to camera shake in a wide range of videos, and compare the quality of results to a number of other baselines.
no code implementations • CVPR 2017 • Qixiang Ye, Tianliang Zhang, Qiang Qiu, Baochang Zhang, Jie Chen, Guillermo Sapiro
In this paper, a self-learning approach is proposed towards solving scene-specific pedestrian detection problem without any human' annotation involved.
no code implementations • CVPR 2017 • Jose Lezama, Qiang Qiu, Guillermo Sapiro
We observe that it is often equally effective to perform hallucination to input NIR images or low-rank embedding to output deep features for a VIS deep model for cross-spectral recognition.
no code implementations • 16 Nov 2016 • Anish K. Simhal, Cecilia Aguerrebere, Forrest Collman, Joshua T. Vogelstein, Kristina D. Micheva, Richard J. Weinberg, Stephen J. Smith, Guillermo Sapiro
The present work describes new probabilistic image analysis methods for single-synapse analysis of synapse populations in both animal and human brains.
no code implementations • CVPR 2017 • Mariano Tepper, Guillermo Sapiro
In this work, we introduce a highly efficient algorithm to address the nonnegative matrix underapproximation (NMU) problem, i. e., nonnegative matrix factorization (NMF) with an additional underapproximation constraint.
1 code implementation • 18 Oct 2016 • Mariano Tepper, Guillermo Sapiro
In this work we introduce a comprehensive algorithmic pipeline for multiple parametric model estimation.
no code implementations • 14 Oct 2016 • Jure Sokolic, Raja Giryes, Guillermo Sapiro, Miguel R. D. Rodrigues
We show that whereas the generalization error of a non-invariant classifier is proportional to the complexity of the input space, the generalization error of an invariant classifier is proportional to the complexity of the base space.
no code implementations • 30 May 2016 • Raja Giryes, Yonina C. Eldar, Alex M. Bronstein, Guillermo Sapiro
Solving inverse problems with iterative algorithms is popular, especially for large data.
no code implementations • 26 May 2016 • Jure Sokolic, Raja Giryes, Guillermo Sapiro, Miguel R. D. Rodrigues
The generalization error of deep neural networks via their classification margin is studied in this work.
no code implementations • 4 Feb 2016 • Cecilia Aguerrebere, Mauricio Delbracio, Alberto Bartesaghi, Guillermo Sapiro
In this work, we tackle the problem of finding the performance limits in image registration when multiple shifted and noisy observations are available.
no code implementations • 21 Dec 2015 • Jiaji Huang, Qiang Qiu, Robert Calderbank, Guillermo Sapiro
The new method encourages the relationships between the learned decisions to resemble a graph representing the manifold structure.
no code implementations • NeurIPS 2015 • Jiaji Huang, Qiang Qiu, Guillermo Sapiro, Robert Calderbank
This paper proposes a framework for learning features that are robust to data variation, which is particularly important when only a limited number of trainingsamples are available.
no code implementations • 17 Sep 2015 • Mauricio Delbracio, Guillermo Sapiro
In this work, we present an algorithm that removes blur due to camera shake by combining information in the Fourier domain from nearby frames in a video.
no code implementations • ICCV 2015 • Jiaji Huang, Qiang Qiu, Robert Calderbank, Guillermo Sapiro
Many recent efforts have been devoted to designing sophisticated deep learning structures, obtaining revolutionary results on benchmark datasets.
no code implementations • CVPR 2015 • Mauricio Delbracio, Guillermo Sapiro
Numerous recent approaches attempt to remove image blur due to camera shake, either with one or multiple input images, by explicitly solving an inverse and inherently ill-posed deconvolution problem.
1 code implementation • 18 May 2015 • Mariano Tepper, Guillermo Sapiro
To address this, in this work we propose to use structured random compression, that is, random projections that exploit the data structure, for two NMF variants: classical and separable.
no code implementations • 11 May 2015 • Mauricio Delbracio, Guillermo Sapiro
The proposed algorithm is strikingly simple: it performs a weighted average in the Fourier domain, with weights depending on the Fourier spectrum magnitude.
no code implementations • 30 Apr 2015 • Raja Giryes, Guillermo Sapiro, Alex M. Bronstein
Three important properties of a classification machinery are: (i) the system preserves the core information of the input data; (ii) the training examples convey information about unseen data; and (iii) the system is able to treat differently points from different classes.
no code implementations • 18 Dec 2014 • Qiang Qiu, Andrew Thompson, Robert Calderbank, Guillermo Sapiro
The Weyl transform is introduced as a rich framework for data representation.
no code implementations • 18 Dec 2014 • Raja Giryes, Guillermo Sapiro, Alex M. Bronstein
In particular, we formally prove in the longer version that DNN with random Gaussian weights perform a distance-preserving embedding of the data, with a special treatment for in-class and out-of-class data.
no code implementations • 16 Dec 2014 • Qiang Qiu, Guillermo Sapiro, Alex Bronstein
Traditional random forest fails to enforce the consistency of hashes generated from each tree for the same class data, i. e., to preserve the underlying similarity, and it also lacks a principled way for code aggregation across trees.
no code implementations • 25 Jul 2014 • Ehsan Elhamifar, Guillermo Sapiro, S. Shankar Sastry
The solution of our optimization finds representatives and the assignment of each element of the target set to each representative, hence, obtaining a clustering.
no code implementations • 13 May 2014 • Vince Lyzinski, Donniell Fishkind, Marcelo Fiori, Joshua T. Vogelstein, Carey E. Priebe, Guillermo Sapiro
Indeed, experimental results illuminate and corroborate these theoretical findings, demonstrating that excellent results are achieved in both benchmark and real data problems by amalgamating the two approaches.
no code implementations • 30 Apr 2014 • Mariano Tepper, Guillermo Sapiro
We consider grouping as a general characterization for problems such as clustering, community detection in networks, and multiple parametric model estimation.
no code implementations • CVPR 2014 • Xin Yuan, Patrick Llull, Xuejun Liao, Jianbo Yang, Guillermo Sapiro, David J. Brady, Lawrence Carin
A simple and inexpensive (low-power and low-bandwidth) modification is made to a conventional off-the-shelf color video camera, from which we recover {multiple} color frames for each of the original measured frames, and each of the recovered frames can be focused at a different depth.
no code implementations • 19 Dec 2013 • Qiang Qiu, Guillermo Sapiro
This work introduces a transformation-based learner model for classification forests.
no code implementations • 19 Dec 2013 • Jonathan Masci, Alex M. Bronstein, Michael M. Bronstein, Pablo Sprechmann, Guillermo Sapiro
In recent years, a lot of attention has been devoted to efficient nearest neighbor search by means of similarity-preserving hashing.
no code implementations • NeurIPS 2013 • Pablo Sprechmann, Roee Litman, Tal Ben Yakar, Alexander M. Bronstein, Guillermo Sapiro
In this paper, we propose a new and computationally efficient framework for learning sparse models.
no code implementations • NeurIPS 2013 • Marcelo Fiori, Pablo Sprechmann, Joshua Vogelstein, Pablo Musé, Guillermo Sapiro
We also present results on multimodal graphs and applications to collaborative inference of brain connectivity from alignment-free functional magnetic resonance imaging (fMRI) data.
no code implementations • 9 Sep 2013 • Qiang Qiu, Guillermo Sapiro
A low-rank transformation learning framework for subspace clustering and classification is here proposed.
no code implementations • 1 Aug 2013 • Qiang Qiu, Guillermo Sapiro, Ching-Hui Chen
We present a low-rank transformation approach to compensate for face variations due to changes in visual domains, such as pose and illumination.
no code implementations • 1 Aug 2013 • Qiang Qiu, Guillermo Sapiro
This proposed learned robust subspace clustering framework significantly enhances the performance of existing subspace clustering methods.
no code implementations • 29 May 2013 • Thiago V. Spina, Mariano Tepper, Amy Esler, Vassilios Morellas, Nikolaos Papanikolopoulos, Alexandre X. Falcão, Guillermo Sapiro
Video object segmentation is a challenging problem due to the presence of deformable, connected, and articulated objects, intra- and inter-object occlusions, object motion, and poor lighting.
no code implementations • 14 Feb 2013 • Xin Yuan, Jianbo Yang, Patrick Llull, Xuejun Liao, Guillermo Sapiro, David J. Brady, Lawrence Carin
This paper introduces the concept of adaptive temporal compressive sensing (CS) for video.
no code implementations • NeurIPS 2012 • Ehsan Elhamifar, Guillermo Sapiro, René Vidal
Given pairwise dissimilarities between data points, we consider the problem of finding a subset of data points called representatives or exemplars that can efficiently describe the data collection.
no code implementations • NeurIPS 2012 • Marcelo Fiori, Pablo Musé, Guillermo Sapiro
Graphical models are a very useful tool to describe and understand natural phenomena, from gene expression to climate change and social interactions.
no code implementations • 15 Jun 2010 • Guoshen Yu, Guillermo Sapiro, Stéphane Mallat
A general framework for solving image inverse problems is introduced in this paper.
no code implementations • NeurIPS 2009 • Mingyuan Zhou, Haojun Chen, Lu Ren, Guillermo Sapiro, Lawrence Carin, John W. Paisley
The beta process is employed as a prior for learning the dictionary, and this non-parametric method naturally infers an appropriate dictionary size.
no code implementations • NeurIPS 2008 • Julien Mairal, Jean Ponce, Guillermo Sapiro, Andrew Zisserman, Francis R. Bach
It is now well established that sparse signal models are well suited to restoration tasks and can effectively be learned from audio, image, and video data.