Search Results for author: Christine Guillemot

Found 22 papers, 2 papers with code

Headset: Human emotion awareness under partial occlusions multimodal dataset

no code implementations IEEE Transactions on Visualization and Computer Graphics- ISMAR 2023 Fatemeh Ghorbani Lohesara, Davi Rabbouni Freitas, Christine Guillemot, Karen Eguiazarian, Sebastian Knorr

The dataset can be helpful in the evaluation and performance testing of various XR algorithms, including but not limited to facial expression recognition and reconstruction, facial reenactment, and volumetric video.

Facial Expression Recognition Point cloud reconstruction

Light-weight CNN-based VVC Inter Partitioning Acceleration

no code implementations17 Dec 2023 Yiqun Liu, Mohsen Abdoli, Thomas Guionnet, Christine Guillemot, Aline Roumy

Compared to the High Efficiency Video Coding (HEVC) standard, VVC offers about 50% compression efficiency gain, in terms of Bjontegaard Delta-Rate (BD-rate), at the cost of about 10x more encoder complexity.

CNN-based Prediction of Partition Path for VVC Fast Inter Partitioning Using Motion Fields

2 code implementations20 Oct 2023 Yiqun Liu, Marc Riviere, Thomas Guionnet, Aline Roumy, Christine Guillemot

Experiments show that the proposed method can achieve acceleration ranging from 16. 5% to 60. 2% under the RandomAccess Group Of Picture 32 (RAGOP32) configuration with a reasonable efficiency drop ranging from 0. 44% to 4. 59% in terms of BD-rate, which surpasses other state-of-the-art solutions.

Learning Kernel-Modulated Neural Representation for Efficient Light Field Compression

no code implementations12 Jul 2023 Jinglei Shi, Yihong Xu, Christine Guillemot

Light field is a type of image data that captures the 3D scene information by recording light rays emitted from a scene at various orientations.

Descriptive Quantization +1

Learning-based Spatial and Angular Information Separation for Light Field Compression

no code implementations13 Apr 2023 Jinglei Shi, Yihong Xu, Christine Guillemot

Light fields are a type of image data that capture both spatial and angular scene information by recording light rays emitted by a scene from different orientations.

Tensor Decomposition

Distilled Low Rank Neural Radiance Field with Quantization for Light Field Compression

no code implementations30 Jul 2022 Jinglei Shi, Christine Guillemot

While existing compression methods encode the set of light field sub-aperture images, our proposed method learns an implicit scene representation in the form of a Neural Radiance Field (NeRF), which also enables view synthesis.

Quantization

PnP-ReG: Learned Regularizing Gradient for Plug-and-Play Gradient Descent

no code implementations29 Apr 2022 Rita Fermanian, Mikael Le Pendu, Christine Guillemot

We show that it is possible to train a network directly modeling the gradient of a MAP regularizer while jointly training the corresponding MAP denoiser.

Image Denoising Image Restoration

Preconditioned Plug-and-Play ADMM with Locally Adjustable Denoiser for Image Restoration

no code implementations1 Oct 2021 Mikael Le Pendu, Christine Guillemot

Plug-and-Play optimization recently emerged as a powerful technique for solving inverse problems by plugging a denoiser into a classical optimization algorithm.

Demosaicking Image Denoising

A learning-based view extrapolation method for axial super-resolution

no code implementations11 Mar 2021 Zhaolin Xiao, Jinglei Shi, Xiaoran Jiang, Christine Guillemot

Axial light field resolution refers to the ability to distinguish features at different depths by refocusing.

Depth Estimation Super-Resolution

A Lightweight Neural Network for Monocular View Generation with Occlusion Handling

no code implementations24 Jul 2020 Simon Evain, Christine Guillemot

The network is also able to identify these occluded areas at training and at test time by checking the pixelwise left-right consistency of the produced disparity maps.

Disparity Estimation Occlusion Handling

Prediction and Sampling with Local Graph Transforms for Quasi-Lossless Light Field Compression

no code implementations8 Mar 2019 Mira Rizkallah, Thomas Maugey, Christine Guillemot

The proposed approach is investigated and is shown to be very efficient in the context of spatio-angular transforms for quasi-lossless compression of light fields.

A Fourier Disparity Layer representation for Light Fields

no code implementations21 Jan 2019 Mikael Le Pendu, Christine Guillemot, Aljosa Smolic

In this paper, we present a new Light Field representation for efficient Light Field processing and rendering called Fourier Disparity Layers (FDL).

Denoising

Context-adaptive neural network based prediction for image compression

1 code implementation17 Jul 2018 Thierry Dumas, Aline Roumy, Christine Guillemot

Unlike the H. 265 intra prediction modes, which are each specialized in predicting a specific texture, the proposed PNNS can model a large set of complex textures.

Image Compression

Learning Discriminative Multilevel Structured Dictionaries for Supervised Image Classification

no code implementations28 Feb 2018 Jeremy Aghaei Mazaheri, Elif Vural, Claude Labit, Christine Guillemot

A multilevel tree-structured discriminative dictionary is learnt for each class, with a learning objective concerning the reconstruction errors of the image patches around the pixels over each class-representative dictionary.

Classification Denoising +3

Autoencoder based image compression: can the learning be quantization independent?

no code implementations23 Feb 2018 Thierry Dumas, Aline Roumy, Christine Guillemot

Usually, the rate-distortion performances of image compression are tuned by varying the quantization step size.

Image Compression Quantization

Light Field Super-Resolution using a Low-Rank Prior and Deep Convolutional Neural Networks

no code implementations12 Jan 2018 Reuben A. Farrugia, Christine Guillemot

Light field imaging has recently known a regain of interest due to the availability of practical light field capturing systems that offer a wide range of applications in the field of computer vision.

Optical Flow Estimation Super-Resolution

Scalable image coding based on epitomes

no code implementations28 Jun 2016 Martin Alain, Christine Guillemot, Dominique Thoreau, Philippe Guillotel

In this paper, we propose a novel scheme for scalable image coding based on the concept of epitome.

Super-Resolution

Face Hallucination using Linear Models of Coupled Sparse Support

no code implementations18 Dec 2015 Reuben Farrugia, Christine Guillemot

Most face super-resolution methods assume that low-resolution and high-resolution manifolds have similar local geometrical structure, hence learn local models on the lowresolution manifolds (e. g. sparse or locally linear embedding models), which are then applied on the high-resolution manifold.

Face Hallucination Hallucination +1

A study of the classification of low-dimensional data with supervised manifold learning

no code implementations21 Jul 2015 Elif Vural, Christine Guillemot

Supervised manifold learning methods learn data representations by preserving the geometric structure of data while enhancing the separation between data samples from different classes.

Dimensionality Reduction General Classification +1

Geometry-Aware Neighborhood Search for Learning Local Models for Image Reconstruction

no code implementations6 May 2015 Julio Cesar Ferreira, Elif Vural, Christine Guillemot

Local learning of sparse image models has proven to be very effective to solve inverse problems in many computer vision applications.

Clustering Deblurring +4

Out-of-sample generalizations for supervised manifold learning for classification

no code implementations9 Feb 2015 Elif Vural, Christine Guillemot

Supervised manifold learning methods for data classification map data samples residing in a high-dimensional ambient space to a lower-dimensional domain in a structure-preserving way, while enhancing the separation between different classes in the learned embedding.

Classification General Classification

Cannot find the paper you are looking for? You can Submit a new open access paper.