Search Results for author:
Found 34 papers, 15 papers with code
Adversarial Magnification to Deceive Deepfake Detection through Super Resolution
Through our experiments, we demonstrate that minimal changes made by these methods in the visual appearance of images can have a profound impact on the performance of deepfake detection systems.
Deepfake Detection without Deepfakes: Generalization via Synthetic Frequency Patterns Injection
We propose to train detectors using only pristine images injecting in part of them crafted frequency patterns, simulating the effects of various deepfake generation techniques without being specific to any.
The devil is in the fine-grained details: Evaluating open-vocabulary object detectors for fine-grained understanding
Recent advancements in large vision-language models enabled visual object detection in open-vocabulary scenarios, where object classes are defined in free-text formats during inference.
Spiking Neural Networks and Bio-Inspired Supervised Deep Learning: A Survey
For a long time, biology and neuroscience fields have been a great source of inspiration for computer scientists, towards the development of Artificial Intelligence (AI) technologies.
Synaptic Plasticity Models and Bio-Inspired Unsupervised Deep Learning: A Survey
Recently emerged technologies based on Deep Learning (DL) achieved outstanding results on a variety of tasks in the field of Artificial Intelligence (AI).
Detecting Images Generated by Diffusers
This paper explores the task of detecting images generated by text-to-image diffusion models.
MINTIME: Multi-Identity Size-Invariant Video Deepfake Detection
In this paper, we introduce MINTIME, a video deepfake detection approach that captures spatial and temporal anomalies and handles instances of multiple people in the same video and variations in face sizes.
Ranked #1 on
Classification
on ForgeryNet
Learning to detect fallen people in virtual worlds
This is due to the error generated during human detection and, more generally, due to the unavailability of large-scale datasets that specialize in fall detection problems with different environments and fall types.
A Spatio-Temporal Attentive Network for Video-Based Crowd Counting
Automatic people counting from images has recently drawn attention for urban monitoring in modern Smart Cities due to the ubiquity of surveillance camera networks.
FastHebb: Scaling Hebbian Training of Deep Neural Networks to ImageNet Level
Learning algorithms for Deep Neural Networks are typically based on supervised end-to-end Stochastic Gradient Descent (SGD) training with error backpropagation (backprop).
Cross-Forgery Analysis of Vision Transformers and CNNs for Deepfake Image Detection
Deepfake Generation Techniques are evolving at a rapid pace, making it possible to create realistic manipulated images and videos and endangering the serenity of modern society.
Deep Features for CBIR with Scarce Data using Hebbian Learning
Features extracted from Deep Neural Networks (DNNs) have proven to be very effective in the context of Content Based Image Retrieval (CBIR).
Actor-Critic Scheduling for Path-Aware Air-to-Ground Multipath Multimedia Delivery
The simulation results show that our scheduler can target a very low loss rate at the receiver by dynamically adapting in real-time the scheduling policy to the path conditions without performing training or relying on prior knowledge of network channel models.
MOBDrone: a Drone Video Dataset for Man OverBoard Rescue
Modern Unmanned Aerial Vehicles (UAV) equipped with cameras can play an essential role in speeding up the identification and rescue of people who have fallen overboard, i. e., man overboard (MOB).
Recurrent Vision Transformer for Solving Visual Reasoning Problems
In the end, this study can lay the basis for a deeper understanding of the role of attention and recurrent connections for solving visual abstract reasoning tasks.
Generative Adversarial Networks for Astronomical Images Generation
Space exploration has always been a source of inspiration for humankind, and thanks to modern telescopes, it is now possible to observe celestial bodies far away from us.
AIMH at SemEval-2021 Task 6: Multimodal Classification Using an Ensemble of Transformer Models
This paper describes the system used by the AIMH Team to approach the SemEval Task 6.
Combining EfficientNet and Vision Transformers for Video Deepfake Detection
Traditionally, Convolutional Neural Networks (CNNs) have been used to perform video deepfake detection, with the best results obtained using methods based on EfficientNet B7.
Ranked #1 on
DeepFake Detection
on DFDC
(using extra training data)
Multi-Camera Vehicle Counting Using Edge-AI
This paper presents a novel solution to automatically count vehicles in a parking lot using images captured by smart cameras.
Towards Efficient Cross-Modal Visual Textual Retrieval using Transformer-Encoder Deep Features
It is designed for producing fixed-size 1024-d vectors describing whole images and sentences, as well as variable-length sets of 1024-d vectors describing the various building components of the two modalities (image regions and sentence words respectively).
MAFER: a Multi-resolution Approach to Facial Expression Recognition
Since the FER task involves analyzing face images that can be acquired with heterogeneous sources, thus involving images with different quality, it is plausible to expect that resolution plays an important role in such a case too.
Hebbian Semi-Supervised Learning in a Sample Efficiency Setting
We propose to address the issue of sample efficiency, in Deep Convolutional Neural Networks (DCNN), with a semi-supervised training strategy that combines Hebbian learning with gradient descent: all internal layers (both convolutional and fully connected) are pre-trained using an unsupervised approach based on Hebbian learning, and the last fully connected layer (the classification layer) is trained using Stochastic Gradient Descent (SGD).
Expression Recognition Analysis in the Wild
The main goal of this work is to define a baseline for a novel method we are going to propose in the near future.
Solving the Same-Different Task with Convolutional Neural Networks
With the experiments carried out in this work, we demonstrate that residual connections, and more generally the skip connections, seem to have only a marginal impact on the learning of the proposed problems.
Training Convolutional Neural Networks With Hebbian Principal Component Analysis
In particular, it has been shown that Hebbian learning can be used for training the lower or the higher layers of a neural network.
Assessing Pattern Recognition Performance of Neuronal Cultures through Accurate Simulation
Previous work has shown that it is possible to train neuronal cultures on Multi-Electrode Arrays (MEAs), to recognize very simple patterns.
Cultural Vocal Bursts Intensity Prediction
Handwritten Digit Recognition
Combining GANs and AutoEncoders for Efficient Anomaly Detection
In this work, we propose CBiGAN -- a novel method for anomaly detection in images, where a consistency constraint is introduced as a regularization term in both the encoder and decoder of a BiGAN.
Fine-grained Visual Textual Alignment for Cross-Modal Retrieval using Transformer Encoders
In this work, we tackle the task of cross-modal retrieval through image-sentence matching based on word-region alignments, using supervision only at the global image-sentence level.
Ranked #6 on
Image Retrieval
on Flickr30K 1K test
The VISIONE Video Search System: Exploiting Off-the-Shelf Text Search Engines for Large-Scale Video Retrieval
In this paper, we describe in details VISIONE, a video search system that allows users to search for videos using textual keywords, occurrence of objects and their spatial relationships, occurrence of colors and their spatial relationships, and image similarity.
Unsupervised Vehicle Counting via Multiple Camera Domain Adaptation
Monitoring vehicle flows in cities is crucial to improve the urban environment and quality of life of citizens.
Virtual to Real adaptation of Pedestrian Detectors
Furthermore, we demonstrate that with our Domain Adaptation techniques, we can reduce the Synthetic2Real Domain Shift, making closer the two domains and obtaining a performance improvement when testing the network over the real-world images.
Using Apache Lucene to Search Vector of Locally Aggregated Descriptors
In this paper, we propose to extend the Surrogate Text Representation to specifically address a class of visual metric objects known as Vector of Locally Aggregated Descriptors (VLAD).
On Reducing the Number of Visual Words in the Bag-of-Features Representation
This poses obvious efficiency problems when using inverted files to perform efficient image matching.
Large Scale Deep Convolutional Neural Network Features Search with Lucene
In this work, we propose an approach to index Deep Convolutional Neural Network Features to support efficient content-based retrieval on large image databases.
