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Luke Melas-Kyriazi

13 accepted papers

2024

A Benchmark for Learning to Translate a New Language from One Grammar Book

ICLR 2024spotlight

Large language models (LLMs) can perform impressive feats with in-context learning or lightweight finetuning. It is natural to wonder how well these models adapt to genuinely new tasks, but how does one find tasks that are unseen in internet-scale training sets? We turn to a field that is explicitly…

Cited by 40Source ↗PDF ↗Scholar ↗
2024

GES : Generalized Exponential Splatting for Efficient Radiance Field Rendering

CVPR 2024poster

Advancements in 3D Gaussian Splatting have significantly accelerated 3D reconstruction and generation. However it may require a large number of Gaussians which creates a substantial memory footprint. This paper introduces GES (Generalized Exponential Splatting) a novel representation that employs Ge…

2024

IM-3D: Iterative Multiview Diffusion and Reconstruction for High-Quality 3D Generation

ICML 2024poster

Most text-to-3D generators build upon off-the-shelf text-to-image models trained on billions of images. They use variants of Score Distillation Sampling (SDS), which is slow, somewhat unstable, and prone to artifacts. A mitigation is to fine-tune the 2D generator to be multi-view aware, which can he…

Cited by 53Source ↗PDF ↗Scholar ↗
2023

Follow the Wisdom of the Crowd: Effective Text Generation via Minimum Bayes Risk Decoding

ACL 2023findings

In open-ended natural-language generation, existing text decoding methods typically struggle to produce text which is both diverse and high-quality. Greedy and beam search are known to suffer from text degeneration and linguistic diversity issues, while temperature, top-k, and nucleus sampling yield…

2023

PC2: Projection-Conditioned Point Cloud Diffusion for Single-Image 3D Reconstruction

CVPR 2023highlight

Reconstructing the 3D shape of an object from a single RGB image is a long-standing problem in computer vision. In this paper, we propose a novel method for single-image 3D reconstruction which generates a sparse point cloud via a conditional denoising diffusion process. Our method takes as input a…

2023

RealFusion: 360deg Reconstruction of Any Object From a Single Image

CVPR 2023poster

We consider the problem of reconstructing a full 360deg photographic model of an object from a single image of it. We do so by fitting a neural radiance field to the image, but find this problem to be severely ill-posed. We thus take an off-the-self conditional image generator based on diffusion and…

Cited by 318Source ↗PDF ↗Scholar ↗
2023

The Harvard USPTO Patent Dataset: A Large-Scale, Well-Structured, and Multi-Purpose Corpus of Patent Applications

NeurIPS 2023spotlight

Innovation is a major driver of economic and social development, and information about many kinds of innovation is embedded in semi-structured data from patents and patent applications. Though the impact and novelty of innovations expressed in patent data are difficult to measure through traditional…

2022

Deep Spectral Methods: A Surprisingly Strong Baseline for Unsupervised Semantic Segmentation and Localization

CVPR 2022oral

Unsupervised localization and segmentation are long-standing computer vision challenges that involve decomposing an image into semantically-meaningful segments without any labeled data. These tasks are particularly interesting in an unsupervised setting due to the difficulty and cost of obtaining de…

Cited by 188PDF ↗code ↗Scholar ↗
2022

Finding an Unsupervised Image Segmenter in each of your Deep Generative Models

ICLR 2022poster

Recent research has shown that numerous human-interpretable directions exist in the latent space of GANs. In this paper, we develop an automatic procedure for finding directions that lead to foreground-background image separation, and we use these directions to train an image segmentation model with…

Cited by 62Source ↗PDF ↗Scholar ↗
2022

Prompt-and-Rerank: A Method for Zero-Shot and Few-Shot Arbitrary Textual Style Transfer with Small Language Models

EMNLP 2022main

We propose a method for arbitrary textual style transfer (TST)—the task of transforming a text into any given style—utilizing general-purpose pre-trained language models. Our method, Prompt-and-Rerank, is based on a mathematical formulation of the TST task, decomposing it into three constituent comp…