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Alex Bronstein

14 accepted papers

2025

A Theoretical Framework for an Efficient Normalizing Flow-Based Solution to the Electronic Schrödinger Equation

AAAI 2025technical

A central problem in quantum mechanics involves solving the Electronic Schrödinger Equation for a molecule or material. The Variational Monte Carlo approach to this problem approximates a particular variational objective via sampling, and then optimizes this approximated objective over a chosen para…

Cited by 0SourcePDFScholar
2025

Sample- and Parameter-Efficient Auto-Regressive Image Models

CVPR 2025poster

We introduce XTRA, a vision model pre-trained with a novel auto-regressive objective that significantly enhances both sample and parameter efficiency compared to previous auto-regressive image models. Unlike contrastive or masked image modeling methods, which have not been demonstrated as having con…

2024

Vector Quantile Regression on Manifolds

AISTATS 2024poster

Quantile regression (QR) is a statistical tool for distribution-free estimation of conditional quantiles of a target variable given explanatory features. QR is limited by the assumption that the target distribution is univariate and defined on an Euclidean domain. Although the notion of quantiles wa…

2021

Detector-Free Weakly Supervised Grounding by Separation

ICCV 2021poster

Nowadays, there is an abundance of data involving images and surrounding free-form text weakly corresponding to those images. Weakly Supervised phrase-Grounding (WSG) deals with the task of using this data to learn to localize (or to ground) arbitrary text phrases in images without any additional an…

Cited by 28PDFcodeScholar
2021

Noise Estimation Using Density Estimation for Self-Supervised Multimodal Learning

AAAI 2021technical

One of the key factors of enabling machine learning models to comprehend and solve real-world tasks is to leverage multimodal data. Unfortunately, annotation of multimodal data is challenging and expensive. Recently, self-supervised multimodal methods that combine vision and language were proposed t…

2021

StarNet: towards Weakly Supervised Few-Shot Object Detection

AAAI 2021technical

Few-shot detection and classification have advanced significantly in recent years. Yet, detection approaches require strong annotation (bounding boxes) both for pre-training and for adaptation to novel classes, and classification approaches rarely provide localization of objects in the scene. In thi…

2020

Robust Quantization: One Model to Rule Them All

NeurIPS 2020poster

Neural network quantization methods often involve simulating the quantization process during training, making the trained model highly dependent on the target bit-width and precise way quantization is performed. Robust quantization offers an alternative approach with improved tolerance to different…

2020

The Shape of Data: Intrinsic Distance for Data Distributions

ICLR 2020poster

The ability to represent and compare machine learning models is crucial in order to quantify subtle model changes, evaluate generative models, and gather insights on neural network architectures. Existing techniques for comparing data distributions focus on global data properties such as mean and co…

Cited by 63SourceScholar
2018

Deformable Shape Completion With Graph Convolutional Autoencoders

CVPR 2018poster

The availability of affordable and portable depth sensors has made scanning objects and people simpler than ever. However, dealing with occlusions and missing parts is still a significant challenge. The problem of reconstructing a (possibly non-rigidly moving) 3D object from a single or multiple par…

Cited by 290SourcePDFScholar
2018

Delta-encoder: an effective sample synthesis method for few-shot object recognition

NeurIPS 2018spotlight

Learning to classify new categories based on just one or a few examples is a long-standing challenge in modern computer vision. In this work, we propose a simple yet effective method for few-shot (and one-shot) object recognition. Our approach is based on a modified auto-encoder, denoted delta-encod…

2018

ForestHash: Semantic Hashing With Shallow Random Forests and Tiny Convolutional Networks

ECCV 2018poster

In this paper, we introduce a random forest semantic hashing scheme that embeds tiny convolutional neural networks (CNN) into shallow random forests. A binary hash code for a data point is obtained by a set of decision trees, setting `1' for the visited tree leaf, and `0' for the rest. We propose to…

Cited by 8SourcePDFScholar
2017

Deep Functional Maps: Structured Prediction for Dense Shape Correspondence

ICCV 2017poster

We introduce a new framework for learning dense correspondence between deformable 3D shapes. Existing learning based approaches model shape correspondence as a labelling problem, where each point of a query shape receives a label identifying a point on some reference domain; the correspondence is th…

Cited by 345PDFcodeScholar
2017

Product Manifold Filter: Non-Rigid Shape Correspondence via Kernel Density Estimation in the Product Space

CVPR 2017poster

Many algorithms for the computation of correspondences between deformable shapes rely on some variant of nearest neighbor matching in a descriptor space. Such are, for example, various point-wise correspondence recovery algorithms used as a post-processing stage in the functional correspondence fram…

Cited by 147PDFScholar