OPIS - 2019 - Annual activity report

OPIS

OPIS - 2019

Project-Team Opis

Team, Visitors, External Collaborators

Overall Objectives

OPIS

Research Program

Application Domains

Highlights of the Year

New Software and Platforms

Platforms

New Results

General risk measures for robust machine learning
Deep Latent Factor Model for Collaborative Filtering
A Proximal Interior Point Algorithm with Applications to Image Processing
Deep Unfolding of a Proximal Interior Point Method for Image Restoration
Preconditioned P-ULA for Joint Deconvolution-Segmentation of Ultrasound Images
A Random Block-Coordinate Douglas-Rachford Splitting Method with Low Computational Complexity for Binary Logistic Regression
A probabilistic incremental proximal gradient method
Optimal Multivariate Gaussian Fitting with Applications to PSF Modeling in Two-Photon Microscopy Imaging
Calibration-less parallel imaging compressed sensing reconstruction based on OSCAR regularization
Proximal approaches for matrix optimization problems: Application to robust precision matrix estimation
Representation Learning on Real-World Graphs
Semi-supervised Learning for Misinformation Detection
A Perturb and Combine Approach to Analyze Real-World Graphs
Stochastic quasi-Fejér block-coordinate fixed point iterations with random sweeping: Mean-square and linear convergence
Rational optimization for non- linear reconstruction with approximate $ℓ_{0}$ penalization
Deep neural network structures solving variational inequalities
Generation of patient-specific cardiac vascular networks: a hybrid image-based and synthetic geometric model
High throughput automated detection of axial malformations in Medaka fish embryo
Quantitative PET in the context of lymphoma
nD variational restoration of curvilinear structures with prior-based directional regularization
Skin aging automated assessment
Particle tracking
Artificial Intelligence Applications for Thoracic imaging
Use of Elastic Registration in Pulmonary MRI for the Assessment of Pulmonary Fibrosis in Patients with Systemic Sclerosis
U-ReSNet: Ultimate Coupling of Registration and Segmentation with Deep Nets
Gene Expression High-Dimensional Clustering Towards a Novel, Robust, Clinically Relevant and Highly Compact Cancer Signature
A Novel Object-Based Deep Learning Framework for Semantic Segmentation of Very High-Resolution Remote Sensing Data: Comparison with Convolutional and Fully Convolutional Networks
A multi-task deep learning framework coupling semantic segmentation and image reconstruction for very high resolution imagery
Detecting Urban Changes with Recurrent Neural Networks from Multitemporal Sentinel-2 Data
Image Registration of Satellite Imagery with Deep Convolutional Neural Networks
Lifting AutoEncoders: Unsupervised Learning of a Fully-Disentangled 3D Morphable Model Using Deep Non-Rigid Structure From Motion

Bilateral Contracts and Grants with Industry

Bilateral Contracts with Industry

Partnerships and Cooperations

Dissemination

Bibliography

Publications of the year

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Section: New Results

A Proximal Interior Point Algorithm with Applications to Image Processing

Participants: Emilie Chouzenoux, Marie-Caroline Corbineau, Jean-Christophe Pesquet

In the work [10], we introduce a new proximal interior point algorithm (PIPA). This algorithm is able to handle convex optimization problems involving various constraints where the objective function is the sum of a Lipschitz differentiable term and a possibly nonsmooth one. Each iteration of PIPA involves the minimization of a merit function evaluated for decaying values of a logarithmic barrier parameter. This inner minimization is performed thanks to a finite number of subiterations of a variable metric forward-backward method employing a line search strategy. The convergence of this latter step as well as the convergence the global method itself are analyzed. The numerical efficiency of the proposed approach is demonstrated in two image processing applications.

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