Manuela Chessa

Manuela Chessa
Università degli Studi di Genova | UNIGE · Dipartimento di Informatica, Bioingegneria, Robotica e Ingegneria dei Sistemi (DIBRIS)

PhD

About

112
Publications
19,820
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771
Citations
Citations since 2017
60 Research Items
557 Citations
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Additional affiliations
January 2012 - present

Publications

Publications (112)
Article
Full-text available
In this paper, we address the problem of designing new formats of computer science orientation activities to be o􀀀ered during high school students internships in Computer Science Bachelor degrees. In order to cover a wide range of computer science topics as well to deal with soft skills and gender gap issues, we propose a teamwork format, called sm...
Chapter
The need to guarantee employees good training in the field of safety in workplaces, risk assessment, fire prevention and fire fighting, or management of dangerous situations is a priority in different sectors, from maritime, airport and military to schools, offices. The application of Virtual Reality (VR) technologies, as a substitute or complement...
Article
Full-text available
Exergames and serious games, based on standard personal computers, mobile devices and gaming consoles or on novel immersive Virtual and Augmented Reality techniques, have become popular in the last few years and are now applied in various research fields, among which cognitive assessment and training of heterogeneous target populations. Moreover, t...
Conference Paper
The first minute of life, the Golden Minute, has been defined as a critical window in which fundamental physiological processes occur for establishing spontaneous ventilation in a newborn. Resuscitation is more likely to succeed if it is performed properly and at the right time. In this scenario, simulation is an appropriate tool for training and e...
Presentation
Full-text available
Context: One out of 10 newborns needs assistance at birth to start spontaneous breathing (Lee et al., 2011). Despite the high percentage of neonates at risk, only neonatologists and anesthesiologists master neonatal life support (NLS) (Murch and Morris, 2014). In fact, 30% of perinatal deaths would be avoided if all the medical staff in the delive...
Poster
Full-text available
Background A non-negligible portion of neonatal deaths is due to the lack of expertise in performing neonatal resuscitation maneuvers during delivery room care. According to literature, an effective newborn life support (NLS) training reduces perinatal death rate by 30%. A possible way to increase the number of healthcare providers trained in NLS i...
Article
Due to the Covid-19 pandemic, millions of people had to stay at home for several months and to move their everyday activities online. From smart-working to online learning, also considering entertainment activities, people started to extensively use platforms for remote communication and for sharing video, text, and audio content. Such systems are...
Presentation
Full-text available
Video abstract about the role of RiNeo MR simulator in enhancing neonatal resuscitation skills
Article
Full-text available
Cybersickness is one of the major roadblocks in the widespread adoption of mixed reality devices. Prolonged exposure to these devices, especially virtual reality devices, can cause users to feel discomfort and nausea, spoiling the immersive experience. Incorporating spatial blur in stereoscopic 3D stimuli has shown to reduce cybersickness. In this...
Chapter
Full-text available
Exergames and Virtual Reality are positive technologies which can be effectively used for the assessment and the training of cognitive capabilities in elderly population. The current COVID-19 pandemic and a consistent number of people living in small villages far from big city centers make necessary to develop applications which can be used remotel...
Article
Full-text available
In this paper, we designed a registration framework that can be used to develop augmented reality environments, where all the real (including the users) and virtual elements are co-localized and registered in a common reference frame. The software is provided together with this paper, to contribute to the research community. The developed framework...
Conference Paper
Full-text available
Medical emergencies can occur anywhere. Children and youth are vulnerable to accidents requiring first aid assistance, despite caregivers are often untrained. An efficient way to teach first aid is through medical simulation so that trainees can familiarize with procedures in a riskless environment. Research studies showed that simulation is more e...
Preprint
Full-text available
Milgram's reality-virtuality continuum applies to interaction in the physical space dimension, going from real to virtual. However, interaction has a social dimension as well, that can go from real to artificial depending on the companion with whom the user interacts. In this paper we present our vision of the Reality-Artificiality bidimensional Co...
Article
Full-text available
The human visual system is foveated: we can see fine spatial details in central vision, whereas resolution is poor in our peripheral visual field, and this loss of resolution follows an approximately logarithmic decrease. Additionally, our brain organizes visual input in polar coordinates. Therefore, the image projection occurring between retina an...
Chapter
In this paper we introduce the virtual reality ship simulator we designed and the results of an experimental session, in which a manoeuvring task was proposed. In particular, we considered three conditions: (i) the kind of visualisation setup, i.e. a non-immersive system based on standard monitors and an immersive system using a head mounted displa...
Book
This book constitutes thoroughly revised and selected papers from the 14th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2019, held in Prague, Czech Republic, in February 2019. The 25 thoroughly revised and extended papers presented in this volume were carefully reviewed and sele...
Article
Full-text available
Spatial orientation relies on a representation of the position and orientation of the body relative to the surrounding environment. When navigating in the environment, this representation must be constantly updated taking into account the direction, speed, and amplitude of body motion. Visual information plays an important role in this updating pro...
Chapter
With the increasing share of elderly population worldwide, the necessity of assistive technologies to support clinicians in monitoring their health conditions is becoming more and more relevant. Recent medical literature has proposed the notion of frail elderly, which rapidly became a key element of clinical practices for the estimation of well-bei...
Conference Paper
Simulation is a powerful learning tool, as it allows gaining direct experience in a controlled and repeatable way. However, the simulation is effective when it is able to reproduce the real conditions and when the user feels him/herself immersed and present in the situation. With the aim of improving these critical points, we propose an immersive v...
Preprint
Full-text available
The human visual system is foveated: we can see fine spatial details in central vision, whereas resolution is poor in our peripheral visual field, and this loss of resolution follows an approximately logarithmic decrease. Additionally, our brain organizes visual input in polar coordinates. Therefore, the image projection occurring between retina an...
Chapter
The cognitive assessment of elderly people is usually performed by means of paper-pencil tests, which may not provide an exhaustive evaluation of the cognitive abilities of the subject. Here, we analyze two solutions based on interaction in virtual environments. In particular, we consider a non-immersive exergame based on a standard tablet, and an...
Book
This book constitutes thoroughly revised and selected papers from the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications, VISIGRAPP 2018, held in Funchal-Madeira, Portugal, in January 2018. The 18 thoroughly revised and extended papers presented in this volume were carefully reviewed and se...
Conference Paper
"Simulation in medicine has been extensively used for the training of medical students, as well as for learning new procedures or studying complex situations, which need a deep understanding of the clinical case. Specifically, in anesthesia and intensive care, bronchoscopy is a procedure entailing some risks, such as perforation, bleeding or other...
Article
The depth cue is a fundamental piece of information for artificial and living beings who interact with the surrounding environment in order to handle objects and to avoid obstacles: in such situations, the disparity patterns, which arise when agents fixate objects, are vector fields. We propose a biologically-inspired computational model to estimat...
Chapter
In this chapter we consider assistive environments and discuss the possible benefits for an aging population. As a study case we summarize the current state of a research project taking place in collaboration with Galliera Hospital (Genoa, Italy). A protected discharge model is being developed to assist elderly users after they have been dismissed...
Article
The statistics of natural environments is an effective source of information to infer the characteristics of the neural mechanisms underlying the encoding and processing of visual information, from orientation and contrast, to depth and retinal disparity. Specifically for retinal disparity, the available databases usually provide stereoscopic image...
Conference Paper
In the last years, virtual reality technology has experienced a boost in affordability, and an increasingly number of applications have emerged proposing new immersive 360 degrees visual content. To make this content accessible for low vision people, one should adopt the same strategies as in traditional displays, i.e., use dedicated image enhancem...
Article
Binocular stereopsis is the ability of a visual system, belonging to a live being or a machine, to interpret the different visual information deriving from two eyes/cameras for depth perception. From this perspective, the ground-truth information about three-dimensional visual space, which is hardly available, is an ideal tool both for evaluating h...
Conference Paper
Vergence control and tracking allow a robot to maintain an accurate estimate of a dynamic object three dimensions , improving depth estimation at the fixation point. Brain-inspired implementations of vergence control are based on models of complex binocular cells of the visual cortex sensitive to disparity. The energy of cells activation provides a...
Article
The recent release of the Oculus Rift, originally developed for entertainment applications, has re-ignited the interest of researchers and clinicians toward the use of head-mounted-displays (HMDs) in basic behavioral research and physical and psychological rehabilitation. However, careful evaluation of the Oculus Rift is necessary to determine whet...
Article
In recent years, the numbers of life-size humanoids as well as their mobile capabilities have steadily grown. Stable walking motion and control for humanoid robots are active fields of research. In this scenario an open question is how to model and analyse the scene so that a motion planning algorithm can generate an appropriate walking pattern. Th...
Article
We implement a neural model for the estimation of the focus of radial motion (FRM) at different retinal locations and assess the model by comparing its results with respect to the precision with which human observers can estimate the FRM in naturalistic motion stimuli. The model describes the deep hierarchy of the first stages of the dorsal visual...
Conference Paper
A natural interaction in virtual reality environments, in particular when wearing head-mounted-displays, is often prevented by the lack of a visual feedback about the user’s own body. This paper aims to create a virtual environment, in which the user can visually perceive his/her own body, and can interact with the virtual objects, by using a virtu...
Conference Paper
Full-text available
Today, it is important in society to make artworks accessible to mass audiences and to widen participation in culture. In such a context, virtual reality is one of the areas of greatest interest: new devices and new techniques are affordable for many users, and virtual and real worlds are often mixed together. In this paper, we propose a "virtual h...
Article
Full-text available
We examine depth perception in images of real scenes with naturalistic variation in pictorial depth cues, simulated dioptric blur and binocular disparity. Light field photographs of natural scenes were taken with a Lytro plenoptic camera that simultaneously captures images at up to 12 focal planes. When accommodation at any given plane was simulate...
Conference Paper
We propose two different strategies to compute edges in the log-polar (cortical) domain. The space-variant processing is obtained by applying local operators (e.g. local derivative filters) directly on the logpolar images, or by embedding the same operators into the log-polar mapping, thus obtaining a cortical representation of the Cartesian featur...
Article
Full-text available
A neural feed-forward model composed of two layers that mimic the V1–MT primary motion pathway, derived from previous works by Heeger and Simoncelli, is proposed and analyzed. Essential aspects of the model are highlighted and comparatively analyzed to point out how realistic neural responses can be efficiently and effectively used for optic flow e...
Article
Motion estimation has been studied extensively in neuroscience in the last two decades. Even though there has been some early interaction between the biological and computer vision communities at a modelling level, comparatively little work has been done on the examination or extension of the biological models in terms of their engineering efficacy...
Conference Paper
Full-text available
Motion processing in primates is an intensely studied problem in visual neurosciences and after more than two decades of research, representation of motion in terms of motion energies computed by V1-MT feedforward interactions remains a strong hypothesis. Thus, decoding the motion energies is of natural interest for developing biologically inspired...
Article
Full-text available
We study the impact of local context of an image (contrast and 2D structure) on spatial motion integration by MT neurons. To do so, we revisited the seminal work by Heeger and Simoncelli (HS) using spatio-temporal filters to estimate optical flow from V1-MT feedforward interactions. However, the HS model cannot deal with several problems encountere...
Article
A novel approach to track the 3D position of the user's eyes in stereoscopic virtual environments, where stereo glasses are worn, is proposed. Such an approach improves a state-of-the-art real-time face tracking algorithm by addressing the occlusion due the stereo glasses and providing estimation of eye position based on biométrie features. More ge...
Article
We present a conceptual framework inspired by biological vision which integrates low-level vision functionalities oriented to actions – typical of the so-called “where” dorsal pathway – with identification and recognition capabilities – common to the “what” ventral pathway. Although they proceed independently, these complementary vision models may...
Article
Reaching a target object in an unknown and unstructured environment is easily performed by human beings. However, designing a humanoid robot that executes the same task requires the implementation of complex abilities, such as identifying the target object in the visual field, estimating its spatial location, and precisely driving the motors of the...
Conference Paper
Full-text available
Context and motivation • Visual motion information is useful for a multiplicity of tasks. • Analysis of it is of great interest both in machine vision for developing applications and biological vision as is it subserves several functional needs. • Owing to the application potential, the problem of visual motion estimation has also received a lot of...
Article
A hierarchical vision system, inspired by the functional architecture of the cortical motion pathway, to provide motion interpretation and to guide real-time actions in the real-world, is proposed. Such a neuromimetic architecture exploits (i) log-polar mapping for data reduction, (ii) a population of motion energy neurons to compute the optic flow...
Article
The spread of graphics processing unit (GPU) computing paved the way to the possibility of reaching high-computing performances in the simulation of complex biological systems. In this work, we develop a very efficient GPU-accelerated neural library, which can be employed in real-world contexts. Such a library provides the neural functionalities th...
Article
WE HAVE DEVELOPED A LOW-COST, PRACTICAL GAZE-CONTINGENT DISPLAY IN WHICH NATURAL IMAGES ARE PRESENTED TO THE OBSERVER WITH DIOPTRIC BLUR AND STEREOSCOPIC DISPARITY THAT ARE DEPENDENT ON THE THREE-DIMENSIONAL STRUCTURE OF NATURAL SCENES OUR SYSTEM SIMULATES A DISTRIBUTION OF RETINAL BLUR AND DEPTH SIMILAR TO THAT EXPERIENCED IN REAL-WORLD VIEWING CO...
Article
Full-text available
Based on the importance of relative disparity between objects for accurate hand-eye coordination, this paper presents a biological approach inspired by the cortical neural architecture. So, the motor information is coded in egocentric coordinates obtained from the allocentric representation of the space (in terms of disparity) generated from the eg...
Article
Reliable distance estimation of objects in a visual scene is essential for any artificial vision system designed to serve as the main sensing unit on robotic platforms. This paper describes a vision-centric framework for a mobile robot which makes use of bio-inspired techniques to solve visual tasks, in particular to estimate disparity. Such framew...
Conference Paper
Full-text available
The recent spread of technologies for 3D stereoscopic visualization gave inspiration to the development of new augmented reality systems, which are able to take advantage of such techniques. Nevertheless, some constraints that limit the natural use of these systems have not yet been resolved. One above all, the possibility for the observer to move...
Conference Paper
Full-text available
We show how a cortical model of early disparity detectors is able to autonomously learn effective control signals in order to drive the vergence eye movements of a binocular active vision system. The proposed approach employs early binocular mechanisms of vision and basic learning processes such as synaptic plasticity and reward modulation. The com...