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Daniel Gatica-Perez

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Related publications (115)

Special Section on Social Media as Sensors

Social media have transformed the Web into an interactive sharing platform where users upload data and media, comment on, and share this content within their social circles. Each content item is associated with an abundance of metadata and related informat ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Hi YouTube! Personality Impressions and Verbal Content in Social Video

Daniel Gatica-Perez, Joan Isaac Biel Tres, John David Scott Dines

Despite the evidence that social video conveys rich human personality information, research investigating the automatic prediction of personality impressions in vlogging has shown that, amongst the Big-Five traits, automatic nonverbal be- havioral cues are ...

2013

Special Issue on the Mobile Data Challenge

Daniel Gatica-Perez

Elsevier Science Bv2013

Wordless Sounds: Robust Speaker Diarization using Privacy-Preserving Audio Representations

Hervé Bourlard, Daniel Gatica-Perez, Sree Hari Krishnan Parthasarathi

This paper investigates robust privacy-sensitive audio features for speaker diarization in multiparty conversations: ie., a set of audio features having low linguistic information for speaker diarization in a single and multiple distant microphone scenario ...

2013

Emergent leaders through looking and speaking: from audio-visual data to multimodal recognition

Daniel Gatica-Perez, Dinesh Babu Jayagopi, Dairazalia Sanchez Cortes, Oya Aran

In this paper we present a multimodal analysis of emergent leadership in small groups using audio-visual features and discuss our experience in designing and collecting a data corpus for this purpose. The ELEA Audio-Visual Synchronized corpus (ELEA AVS) wa ...

2013

Human Interaction Discovery in Smartphone Proximity Networks

Daniel Gatica-Perez

Since humans are fundamentally social beings and interact frequently with others in their daily life, understanding social context is of primary importance in building context-aware applications. In this paper, using smartphone Bluetooth as a proximity sen ...

Springer London Ltd2013

From big smartphone data to worldwide research: The Mobile Data Challenge

Olivier Dousse, Imad Aad, Julien Eberle, Daniel Gatica-Perez

This paper presents an overview of the Mobile Data Challenge (MDC), a large-scale research initiative aimed at generating innovations around smartphone-based research, as well as community-based evaluation of mobile data analysis methodologies. First, we r ...

Elsevier Science Bv2013

The YouTube Lens: Crowdsourced Personality Impressions and Audiovisual Analysis of Vlogs

Daniel Gatica-Perez, Joan Isaac Biel Tres

Despite an increasing interest in understanding human perception in social media through the automatic analysis of users' personality, existing attempts have explored user profiles and text blog data only. We approach the study of personality impressions i ...

Ieee-Inst Electrical Electronics Engineers Inc2013

Mining Large-Scale Smartphone Data for Personality Studies

Daniel Gatica-Perez

In this paper, we investigate the relationship between automatically extracted behavioral characteristics derived from rich smartphone data and self-reported Big-Five personality traits (Extraversion, Agreeableness, Conscientiousness, Emotional Stability a ...

2013

Discovering places of interest in everyday life from smartphone data

Daniel Gatica-Perez

In this paper, a new framework to discover places-of-interest from multimodal mobile phone data is presented. Mobile phones have been used as sensors to obtain location information from users’ real lives. A place-of-interest is defined as a location where ...

Springer2013

Introduction to the Special Section of Best Papers of ACM Multimedia 2011

Daniel Gatica-Perez

Assoc Computing Machinery2012

Learning Semantics From Multimedia Web Resources: An Introduction to the Special Issue

Daniel Gatica-Perez, Jinhui Tang

2012

Assessing Sparse Coding Methods for Contextual Shape Indexing of Maya Hieroglyphs

Jean-Marc Odobez, Daniel Gatica-Perez, Edgar Roman Rangel

Bag-of-visual-words or bag-of-visterms (bov) is a common technique used to index Multimedia information with the purposes of retrieval and classification. In this work we address the problem of constructing efficient bov representations of complex shapes a ...

2012

Inferring competitive role patterns in reality TV show through nonverbal analysis

Daniel Gatica-Perez

This paper introduces a new facet of social media, namely that depicting social interaction. More concretely, we address this problem from the perspective of nonverbal behavior-based analysis of competitive meetings. For our study, we made use of "The Appr ...

2012

A Nonverbal Behavior Approach to Identify Emergent Leaders in Small Groups

Daniel Gatica-Perez, Dairazalia Sanchez Cortes, Oya Aran

dentifying emergent leaders in organizations is a key issue in organizational behavioral research, and a new problem in social computing. This paper presents an analysis on how an emergent leader is perceived in newly formed, small groups, and then tackles ...

2012

VlogSense: Conversational Behavior and Social Attention in YouTube

Daniel Gatica-Perez, Joan Isaac Biel Tres

We introduce the automatic analysis of conversational vlogs (VlogSense, for short) as a new research domain in social media. Conversational vlogs are inherently multimodal, depict natural behavior, and are suitable for large-scale analysis. Given their div ...

2011

Privacy-sensitive recognition of group conversational context with sociometers

Daniel Gatica-Perez, Dinesh Babu Jayagopi

Recognizing the conversational context in which group interactions unfold has applications in machines that support collaborative work and perform automatic social inference using contextual knowledge. This paper addresses the task of discriminating one co ...

2011

Discovering Routines from Large-Scale Human Locations using Probabilistic Topic Models

Daniel Gatica-Perez, Katayoun Farrahi

In this work we discover the daily location-driven routines which are contained in a massive real-life human dataset collected by mobile phones. Our goal is the discovery and analysis of human routines which characterize both individual and group behaviors ...

2011

Estimating Dominance in Multi-Party Meetings Using Speaker Diarization

Daniel Gatica-Perez, Yan Huang

With the increase in cheap commercially available sensors, recording meetings is becoming an increasingly practical option. With this trend comes the need to summarize the recorded data in semantically meaningful ways. Here, we investigate the task of auto ...

2011

Analyzing ancient Maya glyph collections with Contextual Shape Descriptors

Jean-Marc Odobez, Daniel Gatica-Perez, Edgar Roman Rangel

This paper presents an original approach for shape-based analysis of ancient Maya hieroglyphs based on an interdisciplinary collaboration between computer vision and archaeology. Our work is guided by realistic needs of archaeologists and scholars who crit ...

Springer US2011

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