Search Results for author: Giovanni Poggi

Found 24 papers, 8 papers with code

Synthetic Image Verification in the Era of Generative AI: What Works and What Isn't There Yet

no code implementations30 Apr 2024 Diangarti Tariang, Riccardo Corvi, Davide Cozzolino, Giovanni Poggi, Koki Nagano, Luisa Verdoliva

In this work we present an overview of approaches for the detection and attribution of synthetic images and highlight their strengths and weaknesses.

Raising the Bar of AI-generated Image Detection with CLIP

no code implementations30 Nov 2023 Davide Cozzolino, Giovanni Poggi, Riccardo Corvi, Matthias Nießner, Luisa Verdoliva

The aim of this work is to explore the potential of pre-trained vision-language models (VLMs) for universal detection of AI-generated images.

A full-resolution training framework for Sentinel-2 image fusion

no code implementations27 Jul 2023 Matteo Ciotola, Mario Ragosta, Giovanni Poggi, Giuseppe Scarpa

This work presents a new unsupervised framework for training deep learning models for super-resolution of Sentinel-2 images by fusion of its 10-m and 20-m bands.

Super-Resolution

On the detection of synthetic images generated by diffusion models

1 code implementation1 Nov 2022 Riccardo Corvi, Davide Cozzolino, Giada Zingarini, Giovanni Poggi, Koki Nagano, Luisa Verdoliva

Over the past decade, there has been tremendous progress in creating synthetic media, mainly thanks to the development of powerful methods based on generative adversarial networks (GAN).

Image Compression

Deepfake audio detection by speaker verification

no code implementations28 Sep 2022 Alessandro Pianese, Davide Cozzolino, Giovanni Poggi, Luisa Verdoliva

Thanks to recent advances in deep learning, sophisticated generation tools exist, nowadays, that produce extremely realistic synthetic speech.

Face Swapping Speaker Verification

Towards Universal GAN Image Detection

no code implementations23 Dec 2021 Davide Cozzolino, Diego Gragnaniello, Giovanni Poggi, Luisa Verdoliva

The ever higher quality and wide diffusion of fake images have spawn a quest for reliable forensic tools.

Contrastive Learning

Pansharpening by convolutional neural networks in the full resolution framework

2 code implementations16 Nov 2021 Matteo Ciotola, Sergio Vitale, Antonio Mazza, Giovanni Poggi, Giuseppe Scarpa

A further problem is the scarcity of training data, which causes a limited generalization ability and a poor performance on off-training test images.

Pansharpening satellite image super-resolution

Are GAN generated images easy to detect? A critical analysis of the state-of-the-art

1 code implementation6 Apr 2021 Diego Gragnaniello, Davide Cozzolino, Francesco Marra, Giovanni Poggi, Luisa Verdoliva

The advent of deep learning has brought a significant improvement in the quality of generated media.

Deep Learning Methods For Synthetic Aperture Radar Image Despeckling: An Overview Of Trends And Perspectives

no code implementations10 Dec 2020 Giulia Fracastoro, Enrico Magli, Giovanni Poggi, Giuseppe Scarpa, Diego Valsesia, Luisa Verdoliva

Synthetic aperture radar (SAR) images are affected by a spatially-correlated and signal-dependent noise called speckle, which is very severe and may hinder image exploitation.

Sar Image Despeckling

A Full-Image Full-Resolution End-to-End-Trainable CNN Framework for Image Forgery Detection

1 code implementation15 Sep 2019 Francesco Marra, Diego Gragnaniello, Luisa Verdoliva, Giovanni Poggi

Due to limited computational and memory resources, current deep learning models accept only rather small images in input, calling for preliminary image resizing.

Image Forensics Image Forgery Detection

Perceptual Quality-preserving Black-Box Attack against Deep Learning Image Classifiers

1 code implementation20 Feb 2019 Diego Gragnaniello, Francesco Marra, Giovanni Poggi, Luisa Verdoliva

Deep neural networks provide unprecedented performance in all image classification problems, taking advantage of huge amounts of data available for training.

Face Recognition General Classification +1

Do GANs leave artificial fingerprints?

no code implementations31 Dec 2018 Francesco Marra, Diego Gragnaniello, Luisa Verdoliva, Giovanni Poggi

In the last few years, generative adversarial networks (GAN) have shown tremendous potential for a number of applications in computer vision and related fields.

Guided patch-wise nonlocal SAR despeckling

1 code implementation28 Nov 2018 Sergio Vitale, Davide Cozzolino, Giuseppe Scarpa, Luisa Verdoliva, Giovanni Poggi

We propose a new method for SAR image despeckling which leverages information drawn from co-registered optical imagery.

Sar Image Despeckling

Analysis of adversarial attacks against CNN-based image forgery detectors

no code implementations25 Aug 2018 Diego Gragnaniello, Francesco Marra, Giovanni Poggi, Luisa Verdoliva

With the ubiquitous diffusion of social networks, images are becoming a dominant and powerful communication channel.

Image Forensics

Autoencoder with recurrent neural networks for video forgery detection

no code implementations29 Aug 2017 Dario D'Avino, Davide Cozzolino, Giovanni Poggi, Luisa Verdoliva

Video forgery detection is becoming an important issue in recent years, because modern editing software provide powerful and easy-to-use tools to manipulate videos.

Recasting Residual-based Local Descriptors as Convolutional Neural Networks: an Application to Image Forgery Detection

no code implementations14 Mar 2017 Davide Cozzolino, Giovanni Poggi, Luisa Verdoliva

Local descriptors based on the image noise residual have proven extremely effective for a number of forensic applications, like forgery detection and localization.

Image Forgery Detection

A PatchMatch-based Dense-field Algorithm for Video Copy-Move Detection and Localization

no code implementations14 Mar 2017 Luca D'Amiano, Davide Cozzolino, Giovanni Poggi, Luisa Verdoliva

We propose a new algorithm for the reliable detection and localization of video copy-move forgeries.

A reliable order-statistics-based approximate nearest neighbor search algorithm

no code implementations11 Sep 2015 Luisa Verdoliva, Davide Cozzolino, Giovanni Poggi

We propose a new algorithm for fast approximate nearest neighbor search based on the properties of ordered vectors.

Land Use Classification in Remote Sensing Images by Convolutional Neural Networks

no code implementations1 Aug 2015 Marco Castelluccio, Giovanni Poggi, Carlo Sansone, Luisa Verdoliva

We explore the use of convolutional neural networks for the semantic classification of remote sensing scenes.

General Classification

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