25 citations · 114 across the 33 of their papers we have counts for
33 papers
Emotion Intensity Matters: Generating Realistic Expressions in Virtual Humans with CVAEs
Vitor Miguel Xavier Peres, Lara Volpato, Gabriel Ferri Scnheider +1
Generating expressive facial behavior in virtual humans (VHs) remains a central challenge in affective computing and character animation. This paper presents a novel approach based…
Computer Vision for Wildlife Monitoring: Detecting Brown Howler Monkeys using YOLO
Gabriel Ferri Schneider, Guido Luis Glufke Mainardi, Paulo Ricardo Knob +4
Urban expansion threatens global biodiversity, especially affecting arboreal species due to the fragmentation of forest habitats. The movement of arboreal species across disjointed…
LLM-Driven Personalities for Decision Making in Emergency Simulations
Stefano Calzolari, Rubens Montanha, Gabriel Schneider +5
For virtual humans to appear believable, they must exhibit agency and spatial awareness while interacting with their environment in ways that reflect competence and intelligence. A…
True to Tone? Quantifying Skin Tone Fidelity and Bias in Photographic-to-Virtual Human Pipelines
Gabriel Ferri Schneider, Erick Menezes, Rafael Mecenas +3
Accurate reproduction of facial skin tone is essential for realism, identity preservation, and fairness in Virtual Human (VH) rendering. However, most accessible avatar creation pi…
Are You Listening to Me? Fine-Tuning Chatbots for Empathetic Dialogue
Paulo Ricardo Knob, Leonardo Scholler, Juliano Rigatti +1
Conversational agents have made significant progress since ELIZA, expanding their role across various domains, including healthcare, education, and customer service. As these agent…
Perceptual Analysis of Groups of Virtual Humans Animated using Interactive Platforms
Rubens Montanha, Giovana Raupp, Ana Carolina Schmitt +3
Virtual humans (VH) have been used in Computer Graphics (CG) for many years, and perception studies have been applied to understand how people perceive them. Some studies have alre…
Exploring Foundation Models for Synthetic Medical Imaging: A Study on Chest X-Rays and Fine-Tuning Techniques
Davide Clode da Silva, Marina Musse Bernardes, Nathalia Giacomini Ceretta +4
Machine learning has significantly advanced healthcare by aiding in disease prevention and treatment identification. However, accessing patient data can be challenging due to priva…
Micro and macro facial expressions by driven animations in realistic Virtual Humans
Rubens Halbig Montanha, Giovana Nascimento Raupp, Ana Carolina Policarpo Schmitt +2
Computer Graphics (CG) advancements have allowed the creation of more realistic Virtual Humans (VH) through modern techniques for animating the VH body and face, thereby affecting…
Evaluating and Comparing Crowd Simulations: Perspectives from a Crowd Authoring Tool
Gabriel Fonseca Silva, Paulo Ricardo Knob, Rubens Halbig Montanha +1
Crowd simulation is a research area widely used in diverse fields, including gaming and security, assessing virtual agent movements through metrics like time to reach their goals,…
Evaluating the Uncanny Valley Effect in Dark Colored Skin Virtual Humans
Victor Araujo, Angelo Brandelli Costa, Soraia Raupp Musse
With the rapid advancement of technology, the design of virtual humans has led to a very realistic user experience, such as in movies, video games, and simulations. As a result, vi…
Exploring Crowd Dynamics: Simulating Structured Behaviors through Crowd Simulation Models
Thiago Gomes Vidal de Mello, Matheus Schreiner Homrich da Silva, Gabriel Fonseca Silva +1
This paper proposes the simulation of structured behaviors in a crowd of virtual agents by extending the BioCrowds simulation model. Three behaviors were simulated and evaluated, a…
Study of Non-Verbal Behavior in Conversational Agents
Camila Vicari Maccari, Gustavo Galle de Melo, Paulo Ricardo Knob +1
This paper studies the non-verbal behavior of a conversational agent named Arthur. We propose the development of body movements for this agent, which interacts solely through voice…
Detecting Events in Crowds Through Changes in Geometrical Dimensions of Pedestrians
Matheus Schreiner Homrich da Silva, Paulo Brossard de Souza Pinto Neto, Rodolfo Migon Favaretto +1
Security is an important topic in our contemporary world, and the ability to automate the detection of any events of interest that can take place in a crowd is of great interest to…
Revisiting Micro and Macro Expressions in Computer Graphics Characters
Rubens Montanha, Giovana Raupp, Vitoria Gonzalez +5
This paper presents the reproduction of two studies focused on the perception of micro and macro expressions of Virtual Humans (VHs) generated by Computer Graphics (CG), first desc…
Crafting Realistic Virtual Humans: Unveiling Perspectives on Human Perception, Crowds, and Embodied Conversational Agents
Rubens Montanha, Victor Araujo, Paulo Knob +4
Virtual Humans (VHs) were first developed more than 50 years ago and have undergone significant advancements since then. In the past, creating and animating VHs was a complex task.…
Can we truly transfer an actor's genuine happiness to avatars? An investigation into virtual, real, posed and spontaneous faces
Vitor Miguel Xavier Peres, Greice Pinho Dal Molin, Soraia Raupp Musse
A look is worth a thousand words is a popular phrase. And why is a simple look enough to portray our feelings about something or someone? Behind this question are the theoretical f…
Moving Virtual Agents Forward in Space and Time
Gabriel F. Silva, Paulo Knob, Carlos G. Johansson +2
This article proposes an adaptation from the model of Bianco for fast-forwarding agents in crowd simulation, which enables us to accurately fast forward agents in time. Besides bei…
LODUS: A Multi-Level Framework for Simulating Environment and Population -- A Contagion Experiment on a Pandemic World
Gabriel Fonseca Silva, Vinícius Cassol, Amyr Borges Fortes Neto +4
Nowadays we are experiencing a way of life that never existed before. The pandemic has sharply changed our habits, customs, and behavior. In addition, a lot of work was suddenly re…
Perception of Personality Traits in Crowds of Virtual Humans
Lucas Nardino, Enzo Krzmienszki, Vinícius Jurinic Cassol +6
This paper proposes a perceptual visual analysis regarding the personality of virtual humans. Many studies have presented findings regarding the way human beings perceive virtual h…
WebCrowds: An Authoring Tool for Crowd Simulation
Gabriel Silva, Paulo Knob, Rubens Montanha +1
Crowd simulation is an area of research largely used in the game industry. From the movement of a single NPC to the movement of an entire army, crowd simulation methods can be used…
Gender Representation in Brazilian Computer Science Conferences
Natália Dal Pizzol, Eduardo Dos Santos Barbosa, Soraia Raupp Musse
This study presents an automated bibliometric analysis of 6569 research papers published in thirteen Brazilian Computer Science Society (SBC) conferences from 1999 to 2021. Our pri…
Can gender categorization influence the perception of animated virtual humans?
V. Araujo, D. Schaffer, A. B. Costa +1
Animations have become increasingly realistic with the evolution of Computer Graphics (CG). In particular, human models and behaviors were represented through animated virtual huma…
Mitigating Bias in Facial Analysis Systems by Incorporating Label Diversity
Camila Kolling, Victor Araujo, Adriano Veloso +1
Facial analysis models are increasingly applied in real-world applications that have significant impact on peoples' lives. However, as literature has shown, models that automatical…
Is my agent good enough? Evaluating Embodied Conversational Agents with Long and Short-term interactions
Juliane B. S. dos Santos, Paulo Ricardo Knob, Victor Putrich Scherer +1
The use of digital resources has been increasing in every instance of todays society, being it in business or even ludic purposes. Despite such ever increasing use of technologies…