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Noa Cohen 0001

dblp:327/1006-1 · DBLP profile ↗
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1ranked-venue papers
1as first author
1since 2021 · last 2024
0009-0005-4362-909XORCID · verified

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 first-author · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Generative modeling · 100%
Computer graphics and multimedia
1 paper
Image and video processing · 100%

Topics — the 4 heaviest of 4, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Generative modeling
diffusion model
0.812024
From Posterior Sampling to Meaningful Diversity in Image Restoration · ICLR 2024
Machine learning › Generative modeling › diffusion model
image restoration
0.812024
From Posterior Sampling to Meaningful Diversity in Image Restoration · ICLR 2024
Image and video processing
image restoration
0.812024
From Posterior Sampling to Meaningful Diversity in Image Restoration · ICLR 2024
Image and video processing
posterior sampling
0.812024
From Posterior Sampling to Meaningful Diversity in Image Restoration · ICLR 2024

Methods — techniques the papers use, named apart from their topics

posterior sampling · 1.5diffusion model · 1.5
YearPublicationVenuePosition
2024 From Posterior Sampling to Meaningful Diversity in Image Restoration
abstract
Image restoration problems are typically ill-posed in the sense that each degraded image can be restored in infinitely many valid ways. To accommodate this, many works generate a diverse set of outputs by attempting to randomly sample from the posterior distribution of natural images given the degraded input. Here we argue that this strategy is commonly of limited practical value because of the heavy tail of the posterior distribution. Consider for example inpainting a missing region of the sky in an image. Since there is a high probability that the missing region contains no object but clouds, any set of samples from the posterior would be entirely dominated by (practically identical) completions of sky. However, arguably, presenting users with only one clear sky completion, along with several alternative solutions such as airships, birds, and balloons, would better outline the set of possibilities. In this paper, we initiate the study of **meaningfully diverse** image restoration. We explore several post-processing approaches that can be combined with any diverse image restoration method to yield semantically meaningful diversity. Moreover, we propose a practical approach for allowing diffusion based image restoration methods to generate meaningfully diverse outputs, while incurring only negligent computational overhead. We conduct extensive user studies to analyze the proposed techniques, and find the strategy of reducing similarity between outputs to be significantly favorable over posterior sampling. Code and examples are available on the [project's webpage](https://noa-cohen.github.io/MeaningfulDiversityInIR/).
Noa Cohen 0001, Hila Manor, Yuval Bahat, Tomer Michaeli
ICLR1