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Andrew Gallagher

4 accepted papers

2024

Open-Vocabulary 3D Semantic Segmentation with Text-to-Image Diffusion Models

ECCV 2024poster

"In this paper, we investigate the use of diffusion models which are pre-trained on large-scale image-caption pairs for open-vocabulary 3D semantic understanding. We propose a novel method, namely Diff2Scene, which leverages frozen representations from text-image generative models, along with salien…

Cited by 4SourcePDFScholar
2023

Improving Zero-Shot Generalization and Robustness of Multi-Modal Models

CVPR 2023poster

Multi-modal image-text models such as CLIP and LiT have demonstrated impressive performance on image classification benchmarks and their zero-shot generalization ability is particularly exciting. While the top-5 zero-shot accuracies of these models are very high, the top-1 accuracies are much lower…

2021

Automatic Differentiation Variational Inference with Mixtures

AISTATS 2021poster

Automatic Differentiation Variational Inference (ADVI) is a useful tool for efficiently learning probabilistic models in machine learning. Generally approximate posteriors learned by ADVI are forced to be unimodal in order to facilitate use of the reparameterization trick. In this paper, we show how…

Cited by 31SourcePDFScholar
2021

Density of States Estimation for Out of Distribution Detection

AISTATS 2021poster

Perhaps surprisingly, recent studies have shown probabilistic model likelihoods have poor specificity for out-of-distribution (OOD) detection and often assign higher likelihoods to OOD data than in-distribution data. To ameliorate this issue we propose DoSE, the density of states estimator. Drawing…

Cited by 108SourcePDFScholar