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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 40SourcePDFScholar
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 53SourcePDFScholar
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 318SourcePDFScholar
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 188PDFcodeScholar
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 62SourcePDFScholar
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…