Search Results for author: Nicola Pezzotti

Found 15 papers, 5 papers with code

Progressive Monitoring of Generative Model Training Evolution

no code implementations17 Dec 2024 Vidya Prasad, Anna Vilanova, Nicola Pezzotti

While deep generative models (DGMs) have gained popularity, their susceptibility to biases and other inefficiencies that lead to undesirable outcomes remains an issue.

Dimensionality Reduction Generative Adversarial Network +1

A Plug-and-Play Method for Guided Multi-contrast MRI Reconstruction based on Content/Style Modeling

no code implementations20 Sep 2024 Chinmay Rao, Matthias Van Osch, Nicola Pezzotti, Jeroen de Bresser, Laurens Beljaards, Jakob Meineke, Elwin de Weerdt, Huangling Lu, Mariya Doneva, Marius Staring

Furthermore, its practicality is demonstrated on the NYU fastMRI DICOM dataset and two in-house multi-coil raw datasets, obtaining up to 32. 6% more acceleration over learning-based non-guided reconstruction for a given SSIM.

Anatomy Diagnostic +3

NeRF-CA: Dynamic Reconstruction of X-ray Coronary Angiography with Extremely Sparse-views

1 code implementation29 Aug 2024 Kirsten W. H. Maas, Danny Ruijters, Anna Vilanova, Nicola Pezzotti

These techniques enforce the separation of the coronary artery from the background by enforcing dynamic structure sparsity and scene smoothness.

4D reconstruction Dynamic Reconstruction +1

Unraveling the Temporal Dynamics of the Unet in Diffusion Models

no code implementations17 Dec 2023 Vidya Prasad, Chen Zhu-Tian, Anna Vilanova, Hanspeter Pfister, Nicola Pezzotti, Hendrik Strobelt

We propose an analytical method to systematically assess the impact of time steps and core Unet components on the final output.

Denoising

Class-constrained t-SNE: Combining Data Features and Class Probabilities

1 code implementation26 Aug 2023 Linhao Meng, Stef van den Elzen, Nicola Pezzotti, Anna Vilanova

Data features and class probabilities are two main perspectives when, e. g., evaluating model results and identifying problematic items.

Dimensionality Reduction

Image Quality Assessment for Magnetic Resonance Imaging

1 code implementation15 Mar 2022 Segrey Kastryulin, Jamil Zakirov, Nicola Pezzotti, Dmitry V. Dylov

Moreover, the selection of these IQA metrics for a specific task typically involves intentionally induced distortions, such as manually added noise or artificial blurring; yet, the chosen metrics are then used to judge the output of real-life computer vision models.

Denoising Image Enhancement +2

MimicBot: Combining Imitation and Reinforcement Learning to win in Bot Bowl

no code implementations21 Aug 2021 Nicola Pezzotti

This paper describe an hybrid agent trained to play in Fantasy Football AI which participated in the Bot Bowl III competition.

Imitation Learning reinforcement-learning +2

Active Deep Probabilistic Subsampling

no code implementations1 Jan 2021 Hans van Gorp, Iris A.M. Huijben, Bastiaan S. Veeling, Nicola Pezzotti, Ruud Van Sloun

Subsampling a signal of interest can reduce costly data transfer, battery drain, radiation exposure and acquisition time in a wide range of problems.

Deep Learning MRI Reconstruction

Learning to Predict Error for MRI Reconstruction

no code implementations13 Feb 2020 Shi Hu, Nicola Pezzotti, Max Welling

In this paper, we demonstrate that predictive uncertainty estimated by the current methods does not highly correlate with prediction error by decomposing the latter into random and systematic errors, and showing that the former is equivalent to the variance of the random error.

Medical Diagnosis MRI Reconstruction

Progressive Data Science: Potential and Challenges

no code implementations19 Dec 2018 Cagatay Turkay, Nicola Pezzotti, Carsten Binnig, Hendrik Strobelt, Barbara Hammer, Daniel A. Keim, Jean-Daniel Fekete, Themis Palpanas, Yunhai Wang, Florin Rusu

We discuss these challenges and outline first steps towards progressiveness, which, we argue, will ultimately help to significantly speed-up the overall data science process.

Differentiable Image Parameterizations

2 code implementations Distill 2018 Alexander Mordvintsev, Nicola Pezzotti, Ludwig Schubert, Chris Olah

Typically, we parameterize the input image as the RGB values of each pixel, but that isn’t the only way.

Image Generation

GPGPU Linear Complexity t-SNE Optimization

2 code implementations28 May 2018 Nicola Pezzotti, Julian Thijssen, Alexander Mordvintsev, Thomas Hollt, Baldur van Lew, Boudewijn P. F. Lelieveldt, Elmar Eisemann, Anna Vilanova

The t-distributed Stochastic Neighbor Embedding (tSNE) algorithm has become in recent years one of the most used and insightful techniques for the exploratory data analysis of high-dimensional data.

Approximated and User Steerable tSNE for Progressive Visual Analytics

no code implementations5 Dec 2015 Nicola Pezzotti, Boudewijn P. F. Lelieveldt, Laurens van der Maaten, Thomas Höllt, Elmar Eisemann, Anna Vilanova

Progressive Visual Analytics aims at improving the interactivity in existing analytics techniques by means of visualization as well as interaction with intermediate results.

Dimensionality Reduction

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