#denoising

Miguel Afonso Caetanoremixtures@tldr.nettime.org
2025-08-25

"To generate images, diffusion models use a process known as denoising. They convert an image into digital noise (an incoherent collection of pixels), then reassemble it. It’s like repeatedly putting a painting through a shredder until all you have left is a pile of fine dust, then patching the pieces back together. For years, researchers have wondered: If the models are just reassembling, then how does novelty come into the picture? It’s like reassembling your shredded painting into a completely new work of art.

Now two physicists have made a startling claim: It’s the technical imperfections in the denoising process itself that leads to the creativity of diffusion models. In a paper(opens a new tab) that will be presented at the International Conference on Machine Learning 2025, the duo developed a mathematical model of trained diffusion models to show that their so-called creativity is in fact a deterministic process — a direct, inevitable consequence of their architecture.

By illuminating the black box of diffusion models, the new research could have big implications for future AI research — and perhaps even for our understanding of human creativity. “The real strength of the paper is that it makes very accurate predictions of something very nontrivial,” said Luca Ambrogioni(opens a new tab), a computer scientist at Radboud University in the Netherlands."

quantamagazine.org/researchers

#AI #GenerativeAI #DiffusionModels #Denoising #Creativity

David Lu!!dlu
2025-03-09

Wait, three of the Technical Oscars went to different denoising algorithms? That seems like a lot. Maybe this should be a new category.

2024-07-20

A fully automated, faster noise rejection approach to increasing the analytical capability of chemical imaging for digital histopathology.
PLoS ONE 14(4): e0205219, 2019
doi.org/10.1371/journal.pone.0
#denoising #openaccess

Tiago F. R. Ribeirotiago_ribeiro
2024-05-10

“Self-Rectifying Diffusion Sampling with Perturbed-Attention Guidance”

Perturbed-Attention Guidance () é uma técnica sampling guidance de difusão que melhora a qualidade das amostras em cenários condicionais e incondicionais, sem necessidade de treino adicional ou integração de módulos externos. A PAG aprimora a estrutura das amostras sintetizadas durante o processo de , manipulando mapas de auto-atenção selecionados na de

🔗https://ku-cvlab.github.io/Perturbed-A

2024-02-22

'On Efficient and Scalable Computation of the Nonparametric Maximum Likelihood Estimator in Mixture Models', by Yangjing Zhang, Ying Cui, Bodhisattva Sen, Kim-Chuan Toh.

jmlr.org/papers/v25/22-1120.ht

#hessian #denoising #likelihood

2023-10-02

'Lifted Bregman Training of Neural Networks', by Xiaoyu Wang, Martin Benning.

jmlr.org/papers/v24/22-0934.ht

#autoencoders #classifiers #denoising

2023-09-24

"Binlets: Data fusion-aware denoising enables accurate and unbiased quantification of multichannel signals", Silberberg & Grecco, 2023 sciencedirect.com/science/arti

Old school signal processing, not based on machine learning but instead on a translation-invariant Haar wavelet decomposition, profitably exploiting correlations across channels. The manuscript includes an accessible and brief "Theory" section and a longer appendix. All it needs to run is a test function between two data points.

In their benchmarks and use cases, the new method outperforms existing denoising methods. In both time series and on fluorescent microscopy images.

There's a repository available github.com/maurosilber/binlets and can be installed with `pip install binlets`.

#denoising #SignalProcessing #wavelets #ComputerVision

Fig. 6. Denoising applied to fluorescence microscopy images of cells. (left) Intensity images for the ground truth, raw, and raw denoised with binlets and two deep learning methods (N2N and DnCNN). The color scale changes slope at 9 to highlight differences in three areas: nucleus, the rest of the cell, and background. Residuals were calculated against the ground truth, which is the average of 50 raw images, and normalized with their standard deviation. (top-right) Mean and standard deviation for the metrics applied to the whole dataset: root mean squared error improvement (RMSE improv., normalized to raw) and mean bias. They were calculated in three regions: the whole image (all), background and cell areas. (bottom right) Residual mean intensity for each nucleus between the denoised and ground truth images as a function of the ground truth mean intensity. The error bars correspond to the standard deviation of the 50 samples.
Published papers at TMLRtmlrpub@sigmoid.social
2023-08-22

Diffusion Models for Constrained Domains

Nic Fishman, Leo Klarner, Valentin De Bortoli, Emile Mathieu, Michael John Hutchinson

Action editor: Rianne van den Berg.

openreview.net/forum?id=xuWTFQ

#diffusion #denoising #riemannian

2023-07-16

IPOL published a new implementation of the algos behind multi-image #denoising #SuperResolution on the Google Pixel phones from a few generations ago:

ipol.im/pub/art/2023/460/

It's interesting to see these kinds of papers reproduced, even with a few years delay!

CarlosGSCarlosGS
2023-07-04

Now the PhD is done, I'm spending these days digitising old family footage (VHS and other tape formats) 🤓

Any tips to restore/upscale old footage with minimal loss? Here is an image showing the low resolution available.

I've tried but it removes detail. If there's any open source AI solution for , please let me know!

Published papers at TMLRtmlrpub@sigmoid.social
2023-06-27

Inversion by Direct Iteration: An Alternative to Denoising Diffusion for Image Restoration

Mauricio Delbracio, Peyman Milanfar

Action editor: Jia-Bin Huang.

openreview.net/forum?id=VmyFF5

#denoising #restoration #deblurring

TMLR certificationstmlrcert@sigmoid.social
2023-06-27

New #FeaturedCertification:

Inversion by Direct Iteration: An Alternative to Denoising Diffusion for Image Restoration

Mauricio Delbracio, Peyman Milanfar

openreview.net/forum?id=VmyFF5

#denoising #restoration #deblurring

New Submissions to TMLRtmlrsub@sigmoid.social
2023-06-15
Published papers at TMLRtmlrpub@sigmoid.social
2023-05-09

Soft Diffusion: Score Matching with General Corruptions

Giannis Daras, Mauricio Delbracio, Hossein Talebi, Alex Dimakis, Peyman Milanfar

Action editor: Jonathan Scarlett.

openreview.net/forum?id=W98reb

#denoising #corruptions #diffusion

Francesco Yoshi Gobbo :linux:frayoshi@qoto.org
2023-04-29

#stableDiffusion #AI #txt2img
I have just finished this #experiment, in which 310 pictures have been generated with the same seed, only difference is the amount of samples, which increased progressively from 1 to 310.

These generations have then been upscaled using the realest-general-x4v3 upscaler model and #ComfyUI as software.

This the result:
youtu.be/hU4MyESWnm0

#AIart #denoising #Realesr #Dreamshaper

Published papers at TMLRtmlrpub@sigmoid.social
2023-04-06

Training Data Size Induced Double Descent For Denoising Feedforward Neural Networks and the Role ...

Rishi Sonthalia, Raj Rao Nadakuditi

openreview.net/forum?id=FdMWtp

#denoising #generalization #shrinkage

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