Search Results for author: Mariella Dimiccoli

Found 33 papers, 9 papers with code

3M-TRANSFORMER: A Multi-Stage Multi-Stream Multimodal Transformer for Embodied Turn-Taking Prediction

no code implementations23 Oct 2023 Mehdi Fatan, Emanuele Mincato, Dimitra Pintzou, Mariella Dimiccoli

Predicting turn-taking in multiparty conversations has many practical applications in human-computer/robot interaction.

Debiased-CAM to mitigate systematic error with faithful visual explanations of machine learning

no code implementations30 Jan 2022 Wencan Zhang, Mariella Dimiccoli, Brian Y. Lim

We present Debiased-CAM to recover explanation faithfulness across various bias types and levels by training a multi-input, multi-task model with auxiliary tasks for explanation and bias level predictions.

Enhancing Egocentric 3D Pose Estimation with Third Person Views

1 code implementation6 Jan 2022 Ameya Dhamanaskar, Mariella Dimiccoli, Enric Corona, Albert Pumarola, Francesc Moreno-Noguer

In this paper, we propose a novel approach to enhance the 3D body pose estimation of a person computed from videos captured from a single wearable camera.

3D Pose Estimation Domain Adaptation

Learning grounded word meaning representations on similarity graphs

1 code implementation EMNLP 2021 Mariella Dimiccoli, Herwig Wendt, Pau Batlle

This paper introduces a novel approach to learn visually grounded meaning representations of words as low-dimensional node embeddings on an underlying graph hierarchy.

Graph Embedding

Graph Constrained Data Representation Learning for Human Motion Segmentation

1 code implementation ICCV 2021 Mariella Dimiccoli, Lluís Garrido, Guillem Rodriguez-Corominas, Herwig Wendt

Recently, transfer subspace learning based approaches have shown to be a valid alternative to unsupervised subspace clustering and temporal data clustering for human motion segmentation (HMS).

Clustering Motion Segmentation +3

Interaction-GCN: A Graph Convolutional Network based framework for social interaction recognition in egocentric videos

1 code implementation28 Apr 2021 Simone Felicioni, Mariella Dimiccoli

In this paper we propose a new framework to categorize social interactions in egocentric videos, we named InteractionGCN.

Modeling long-term interactions to enhance action recognition

no code implementations23 Apr 2021 Alejandro Cartas, Petia Radeva, Mariella Dimiccoli

In this paper, we propose a new approach to under-stand actions in egocentric videos that exploits the semantics of object interactions at both frame and temporal levels.

Action Recognition

Debiased-CAM to mitigate image perturbations with faithful visual explanations of machine learning

no code implementations10 Dec 2020 Wencan Zhang, Mariella Dimiccoli, Brian Y. Lim

We present Debiased-CAM to recover explanation faithfulness across various bias types and levels by training a multi-input, multi-task model with auxiliary tasks for explanation and bias level predictions.

BIG-bench Machine Learning Self-Supervised Learning

Learning event representations for temporal segmentation of image sequences by dynamic graph embedding

no code implementations8 Oct 2019 Mariella Dimiccoli, Herwig Wendt

The main advantage of DGE over state-of-the-art self-supervised approaches is that it does not require any training set, but instead learns iteratively from the data itself a low-dimensional embedding that reflects their temporal and semantic similarity.

Domain Adaptation Dynamic graph embedding +5

Enhancing temporal segmentation by nonlocal self-similarity

1 code implementation14 Jun 2019 Mariella Dimiccoli, Herwig Wendt

Temporal segmentation of untrimmed videos and photo-streams is currently an active area of research in computer vision and image processing.

Event Segmentation Segmentation

Social Relation Recognition in Egocentric Photostreams

no code implementations12 May 2019 Emanuel Sanchez Aimar, Petia Radeva, Mariella Dimiccoli

This paper proposes an approach to automatically categorize the social interactions of a user wearing a photo-camera 2fpm, by relying solely on what the camera is seeing.

Relation

On the Role of Event Boundaries in Egocentric Activity Recognition from Photostreams

no code implementations2 Sep 2018 Alejandro Cartas, Estefania Talavera, Petia Radeva, Mariella Dimiccoli

Event boundaries play a crucial role as a pre-processing step for detection, localization, and recognition tasks of human activities in videos.

Action Recognition Egocentric Activity Recognition +1

Smartphone picture organization: A hierarchical approach

no code implementations15 Mar 2018 Stefan Lonn, Petia Radeva, Mariella Dimiccoli

Unlike photo collections captured by a digital camera, which typically are pre-processed by the user who organizes them into event-related folders, smartphone pictures are automatically stored in the cloud.

Batch-based Activity Recognition from Egocentric Photo-Streams Revisited

1 code implementation11 Oct 2017 Alejandro Cartas, Juan Marin, Petia Radeva, Mariella Dimiccoli

Wearable cameras can gather large a\-mounts of image data that provide rich visual information about the daily activities of the wearer.

Activity Recognition

Detecting Hands in Egocentric Videos: Towards Action Recognition

no code implementations8 Sep 2017 Alejandro Cartas, Mariella Dimiccoli, Petia Radeva

Recently, there has been a growing interest in analyzing human daily activities from data collected by wearable cameras.

Action Recognition Hand Detection +1

Towards social pattern characterization in egocentric photo-streams

no code implementations5 Sep 2017 Maedeh Aghaei, Mariella Dimiccoli, Cristian Canton Ferrer, Petia Radeva

Following the increasingly popular trend of social interaction analysis in egocentric vision, this manuscript presents a comprehensive study for automatic social pattern characterization of a wearable photo-camera user, by relying on the visual analysis of egocentric photo-streams.

Time Series Time Series Analysis

Batch-Based Activity Recognition from Egocentric Photo-Streams

no code implementations25 Aug 2017 Alejandro Cartas, Mariella Dimiccoli, Petia Radeva

However, one of its main technical challenges is to deal with the low frame rate of wearable photo-cameras, which causes abrupt appearance changes between consecutive frames.

Activity Recognition Optical Flow Estimation

Recognizing Activities of Daily Living from Egocentric Images

no code implementations13 Apr 2017 Alejandro Cartas, Juan Marín, Petia Radeva, Mariella Dimiccoli

Recognizing Activities of Daily Living (ADLs) has a large number of health applications, such as characterize lifestyle for habit improvement, nursing and rehabilitation services.

Activity Recognition General Classification

Pay Attention to Those Sets! Learning Quantification from Images

no code implementations10 Apr 2017 Ionut Sorodoc, Sandro Pezzelle, Aurélie Herbelot, Mariella Dimiccoli, Raffaella Bernardi

We however argue that precisely identifying the composition of the sets is not only beyond current state-of-the-art models but perhaps even detrimental to a task that is most efficiently performed by refining the approximate numerosity estimator of the system.

R-Clustering for Egocentric Video Segmentation

no code implementations10 Apr 2017 Estefania Talavera, Mariella Dimiccoli, Marc Bolaños, Maedeh Aghaei, Petia Radeva

In this paper, we present a new method for egocentric video temporal segmentation based on integrating a statistical mean change detector and agglomerative clustering(AC) within an energy-minimization framework.

Clustering Segmentation +2

All the people around me: face discovery in egocentric photo-streams

no code implementations6 Mar 2017 Maedeh Aghaei, Mariella Dimiccoli, Petia Radeva

Given an unconstrained stream of images captured by a wearable photo-camera (2fpm), we propose an unsupervised bottom-up approach for automatic clustering appearing faces into the individual identities present in these data.

Clustering

With Whom Do I Interact? Detecting Social Interactions in Egocentric Photo-streams

no code implementations13 May 2016 Maedeh Aghaei, Mariella Dimiccoli, Petia Radeva

Given a user wearing a low frame rate wearable camera during a day, this work aims to automatically detect the moments when the user gets engaged into a social interaction solely by reviewing the automatically captured photos by the worn camera.

Time Series Time Series Analysis

SR-Clustering: Semantic Regularized Clustering for Egocentric Photo Streams Segmentation

1 code implementation22 Dec 2015 Mariella Dimiccoli, Marc Bolaños, Estefania Talavera, Maedeh Aghaei, Stavri G. Nikolov, Petia Radeva

While wearable cameras are becoming increasingly popular, locating relevant information in large unstructured collections of egocentric images is still a tedious and time consuming processes.

Clustering

A Computational Model for Amodal Completion

no code implementations26 Nov 2015 Maria Oliver, Gloria Haro, Mariella Dimiccoli, Baptiste Mazin, Coloma Ballester

This paper presents a computational model to recover the most likely interpretation of the 3D scene structure from a planar image, where some objects may occlude others.

Semantic Summarization of Egocentric Photo Stream Events

1 code implementation2 Nov 2015 Aniol Lidon, Marc Bolaños, Mariella Dimiccoli, Petia Radeva, Maite Garolera, Xavier Giró-i-Nieto

With the rapid increase of users of wearable cameras in recent years and of the amount of data they produce, there is a strong need for automatic retrieval and summarization techniques.

Image Retrieval Retrieval

Active skeleton for bacteria modeling

no code implementations23 Jul 2015 Jean-Pascal Jacob, Mariella Dimiccoli, Lionel Moisan

The investigation of spatio-temporal dynamics of bacterial cells and their molecular components requires automated image analysis tools to track cell shape properties and molecular component locations inside the cells.

Towards Storytelling from Visual Lifelogging: An Overview

no code implementations22 Jul 2015 Marc Bolaños, Mariella Dimiccoli, Petia Radeva

Visual lifelogging consists of acquiring images that capture the daily experiences of the user by wearing a camera over a long period of time.

Particle detection and tracking in fluorescence time-lapse imaging: a contrario approach

no code implementations22 Jul 2015 Mariella Dimiccoli, Jean-Pascal Jacob, Lionel Moisan

This paper proposes a probabilistic approach for the detection and the tracking of particles in fluorescent time-lapse imaging.

Multi-Face Tracking by Extended Bag-of-Tracklets in Egocentric Videos

no code implementations16 Jul 2015 Maedeh Aghaei, Mariella Dimiccoli, Petia Radeva

In this paper, we propose a novel method to find correspondences of multiple faces in low temporal resolution egocentric videos acquired through a wearable camera.

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