Search Results for author: George Retsinas

Found 16 papers, 7 papers with code

Mushroom Segmentation and 3D Pose Estimation from Point Clouds using Fully Convolutional Geometric Features and Implicit Pose Encoding

1 code implementation17 Apr 2024 George Retsinas, Niki Efthymiou, Petros Maragos

We have validated the effectiveness of the proposed implicit-based approach for a synthetic test set, as well as provided qualitative results for a small set of real acquired point clouds with depth sensors.

3D Pose Estimation Instance Segmentation +1

Best Practices for a Handwritten Text Recognition System

1 code implementation17 Apr 2024 George Retsinas, Giorgos Sfikas, Basilis Gatos, Christophoros Nikou

Handwritten text recognition has been developed rapidly in the recent years, following the rise of deep learning and its applications.

Handwritten Text Recognition HTR

3D Facial Expressions through Analysis-by-Neural-Synthesis

no code implementations5 Apr 2024 George Retsinas, Panagiotis P. Filntisis, Radek Danecek, Victoria F. Abrevaya, Anastasios Roussos, Timo Bolkart, Petros Maragos

Instead, SMIRK replaces the differentiable rendering with a neural rendering module that, given the rendered predicted mesh geometry, and sparsely sampled pixels of the input image, generates a face image.

3D Face Reconstruction Neural Rendering

Feather: An Elegant Solution to Effective DNN Sparsification

1 code implementation3 Oct 2023 Athanasios Glentis Georgoulakis, George Retsinas, Petros Maragos

Neural Network pruning is an increasingly popular way for producing compact and efficient models, suitable for resource-limited environments, while preserving high performance.

Network Pruning

Matrix Factorization in Tropical and Mixed Tropical-Linear Algebras

no code implementations25 Sep 2023 Ioannis Kordonis, Emmanouil Theodosis, George Retsinas, Petros Maragos

Matrix Factorization (MF) has found numerous applications in Machine Learning and Data Mining, including collaborative filtering recommendation systems, dimensionality reduction, data visualization, and community detection.

Collaborative Filtering Community Detection +3

On the Matrix Form of the Quaternion Fourier Transform and Quaternion Convolution

no code implementations4 Jul 2023 Giorgos Sfikas, George Retsinas

We focus especially on the relation of Quaternion Fourier Transform matrices to Quaternion Circulant matrices (representing quaternionic convolution), and the eigenstructure of the latter.

Relation

WordStylist: Styled Verbatim Handwritten Text Generation with Latent Diffusion Models

1 code implementation29 Mar 2023 Konstantina Nikolaidou, George Retsinas, Vincent Christlein, Mathias Seuret, Giorgos Sfikas, Elisa Barney Smith, Hamam Mokayed, Marcus Liwicki

Our proposed method is able to generate realistic word image samples from different writer styles, by using class index styles and text content prompts without the need of adversarial training, writer recognition, or text recognition.

 Ranked #1 on HTR on IAM

Data Augmentation Denoising +5

Visual Speech-Aware Perceptual 3D Facial Expression Reconstruction from Videos

1 code implementation22 Jul 2022 Panagiotis P. Filntisis, George Retsinas, Foivos Paraperas-Papantoniou, Athanasios Katsamanis, Anastasios Roussos, Petros Maragos

The recent state of the art on monocular 3D face reconstruction from image data has made some impressive advancements, thanks to the advent of Deep Learning.

3D Face Reconstruction 3D Reconstruction

Trainable Learning Rate

no code implementations29 Sep 2021 George Retsinas, Giorgos Sfikas, Panagiotis Filntisis, Petros Maragos

Selecting an appropriate learning rate for efficiently training deep neural networks is a difficult process that can be affected by numerous parameters, such as the dataset, the model architecture or even the batch size.

Enhancing Handwritten Text Recognition with N-gram sequence decomposition and Multitask Learning

no code implementations28 Dec 2020 Vasiliki Tassopoulou, George Retsinas, Petros Maragos

In our work, we utilize a Multi-task Learning scheme, training the model to perform decompositions of the target sequence with target units of different granularity, from fine to coarse.

Handwritten Text Recognition Language Modelling +1

WSRNet: Joint Spotting and Recognition of Handwritten Words

no code implementations17 Aug 2020 George Retsinas, Giorgos Sfikas, Petros Maragos

The related joint loss leads to a boost in recognition performance, while the Seq2Seq branch is used to create efficient word representations.

Binarization Keyword Spotting

Weight Pruning via Adaptive Sparsity Loss

1 code implementation4 Jun 2020 George Retsinas, Athena Elafrou, Georgios Goumas, Petros Maragos

Pruning neural networks has regained interest in recent years as a means to compress state-of-the-art deep neural networks and enable their deployment on resource-constrained devices.

Image Classification Network Pruning

An Alternative Deep Feature Approach to Line Level Keyword Spotting

no code implementations CVPR 2019 George Retsinas, Georgios Louloudis, Nikolaos Stamatopoulos, Giorgos Sfikas, Basilis Gatos

Three distinct components, all modeled as neural networks, are combined: normalization, feature extraction and representation of image and textual input into a common space.

Handwritten Text Recognition HTR +1

RecNets: Channel-wise Recurrent Convolutional Neural Networks

no code implementations28 May 2019 George Retsinas, Athena Elafrou, Georgios Goumas, Petros Maragos

In this paper, we introduce Channel-wise recurrent convolutional neural networks (RecNets), a family of novel, compact neural network architectures for computer vision tasks inspired by recurrent neural networks (RNNs).

General Classification Image Classification

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