João Jacob

João Jacob
University of Porto | UP · Faculty of Engineering

PhD

About

41
Publications
11,927
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207
Citations

Publications

Publications (41)
Article
Full-text available
3D games routinely turn to modular architecture as an optimization technique for environment art and level design, although there is little documentation of how to implement it. As a result, many games struggle to apply it effectively, contributing to problems such as art fatigue and production delays. This investigation proposes a set of unified p...
Chapter
Existing architectural locations are often recreated in games using unique “hero” meshes instead of modular assets, which in these cases are commonly perceived as too limited or inaccurate. This applies to real-world locations or, as in this case study, transmedia locations. This study proposes that hero meshes are not always necessary and that mod...
Conference Paper
The use of virtual reality technologies for data visualization and analysis has been an emerging topic of research in the past years. However, one type of data has been left neglected, the point cloud. While some strides have been made in the visualization and analysis of point clouds in immersive environments, these have yet to be used for direct...
Chapter
The increase in the size and complexity of today’s datasets creates a need to develop and experiment with novel data visualization methods. One of these innovations is immersive analytics, in which extended reality technologies such as virtual reality headsets are used to present and study data in virtual worlds. But while the use of immersive anal...
Conference Paper
Pedestrian simulation is often forgotten or implemented poorly in most high profile traffic simulators. This is the case of SUMO, where the pedestrian models are very simple and not based in real human behaviour, making it impossible to study pedestrian safety with it. With this in mind, the ability to externally control pedestrians in SUMO was exp...
Chapter
Full-text available
In this chapter, synergies between augmented reality (AR) and shared experiences are explored. The shared experiences (such as visiting a cultural site or a museum) can benefit from computer-supported collaborative work done in the context of maintenance, training, and simulation. With the wide availability and use of AR-enabled smartphones, it is...
Conference Paper
Full-text available
This review examines how the use of photogrammetry in game environment art has changed since The Vanishing of Ethan Carter. It identifies 26 games released between 2014-2019 featuring photoscanned environment assets, including the well-established AAA franchises Battlefront, Far Cry, Forza, and Resident Evil. In popular media, photogrammetry went f...
Chapter
Pedestrian behavior is an essential subject of study when developing or enhancing urban infrastructure. However, most behavior elicitation techniques are inherently bound to be biased by either the observer, the subject, or the environment. The SIMUSAFE project aims at collecting road users’ behavioral data in naturalistic and realistic scenarios t...
Chapter
Object detection in the traffic domain has faced growing relevance through the years in developing autonomous driving mechanisms. As with vehicles, pedestrians face a very dynamic context, and identifying relevant objects from a pedestrian perspective presents many challenges. Improving the detection of some objects, such as crosswalks, is very rel...
Article
Full-text available
Serious Pervasive Games extend the magic circle (Huizinga, 1938) to the players' context and surrounding environment. The blend of both physical and fictive game worlds provides a push in player engagement and promotes situated learning approaches. Space and time, as well as social context, acquire a more meaningful impact on the gameplay. From per...
Chapter
In the last few years autonomous vehicles have been on the rise. This increase in popularity lead by new technology advancements and availability to the regular consumer has put them in a position where safety must now be a top priority. With the objective of increasing the reliability and safety of these vehicles, fault detection and treatment mod...
Conference Paper
Full-text available
We present a novel physics-based concatenative sound synthesis (CSS) methodology for congruent interactions across physical, graphical, aural and haptic modalities in Virtual Environments. Navigation in aural and haptic corpora of annotated audio units is driven by user interactions with highly realistic photogrammetric based models in a game engin...
Chapter
Full-text available
The prevention of falls in older adults is an issue that can only be solved with regular exercises, sometimes with the supervision of therapists. This paper presents a game framework that uses devices such as the Wii Balance Board (WBB) to replicate fall-prevention programs, such as the Otago Exercise Programme. The objective is to increase the adh...
Article
Full-text available
Creating an augmented reality (AR) urban tourism application presents several interactivity challenges on how to convey an engaging multimedia experience on-site. This article describes a methodology for fast prototyping of multimedia mobile applications dedicated to urban tourism storytelling with special focus on AR techniques. Following the less...
Article
Full-text available
This paper describes an experiment designed to elicit human behaviour when facing the urgent need of exiting an unknown building. This work is part of a larger effort to devise the methodological approach underlying the implementation of simulation of pedestrians and elicitation of their emergent dynamics, an experimental framework coined SPEED. To...
Conference Paper
Full-text available
This paper proposes an interactive annotation technique for 360° videos that allows the use of traditional video editing techniques to add content to immersive videos. Using the case study of immersive journalism the main objective is to diminish the entry barrier for annotating 360° video pieces, by providing a different annotation paradigm and a...
Conference Paper
Full-text available
To assess the success of fall-prevention oriented exergames two digital games were developed taking advantage of the Wii Balance Board (WBB) capabilities. The objective was to evaluate the exergames' potential to address elderly adults' declining motivation to exercise regularly despite the benefits related to fall-prevention. The system uses the W...
Article
Full-text available
The increasing number of vehicles and mobile users has led to a huge increase in the development of Advanced Driver Assistance Systems (ADAS). In this paper we propose a multi-agent-based driving simulator which integrates a testbed that allows ADAS developers to compress testing time and carry out tests in a controlled environment while using a lo...
Article
Full-text available
This study describes a framework based upon body tracking devices and aimed at assisting children with motor impairments and aims at understanding what positive contribute it can deliver for their rehabilitation process. A case study is defined featuring two motor disorders that take advantage of the technological specifications, as well as the typ...
Conference Paper
Full-text available
Human behaviour knowledge is an important requirement for implementing realistic evacuation models. Although much work has been done in this field of research there are no universally accepted quantitative methods. In this paper we present a novel methodology for human behaviour elicitation that was coined SPEED (Simulation of Pedestrian and Elicit...
Conference Paper
Full-text available
In the Container Loading Problem literature, the cargo dynamic stability constraint has been evaluated by the percentage of boxes with insufficient lateral support. This metric has been used as a proxy for the real-world dynamic stability constraint and has conditioned the algorithms developed for this problem. It has the advantage of not being exp...
Conference Paper
Full-text available
Understanding human behaviour in emergency evacuation from buildings is of utmost importance for fire safety designers, architects and engineers as they elaborate on strategies to improve the emergency paths to exits. This paper describes an experiment designed to elicit human behaviour when facing the urgent need of exiting a room of an unknown bu...
Article
Full-text available
Location-based games have become more popular thanks to the growth of mobile device's technology. This paper presents a framework for the development of location-based augmented reality games and wARms, an augmented-reality location-based mobile game prototype based on said framework that uses the player's real position and orientation in order to...
Article
Sports simulation can help to assess the performance of strategies and players in a sand-boxed environment. Ultimately it can lead to improved reallife performance of actual teams if it is able to provide useful information to the team coach or manager. Many tools are now available for many different sports, most notably Soccer Server Simulator, a...
Conference Paper
This article proposes a solution for user localization in indoor areas using the compass, accelerometer and Bluetooth of a mobile device to calculate the user's position within this virtual environment, for it to be used in both entertainment-industry mobile games and serious games. The user's position is viewed through a 3D virtual environment rep...
Article
Full-text available
As new and more powerful mobile devices arrive, such as smartphones, tablets and PDAs, so do new ways of interaction emerge for the users and developers to explore. These devices allow for the creation of never-before-seen applications, using the broad range of inputs and sensors these devices integrate (such as accelerometers, light sensors, elect...

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Projects

Project (1)
Project
BEACONING’s concept is to digitally enable play-learn in everyday spaces fostering cross-subject learning, facilitated by personified gamified lesson plan where context-aware educational resources and ad-hoc learning in the surrounding environment can be triggered. BEACONING pragmatically addresses the needs of disabled learners, who are engaging with general education.