10 results on '"Palestra, G."'
Search Results
2. Analysis of HOG suitability for facial traits description in FER problems
- Author
-
Del Coco M., Carcagni P., Palestra G., Leo M., and Distante C.
- Subjects
HOG ,SVM ,Facial expression recognition - Abstract
Automatic Facial Expression Recognition is a topic of high interest especially due to the growing diffusion of assistive computing applications, as Human Robot Interaction, where a robust awareness of the people emotion is a key point. This paper proposes a novel automatic pipeline for facial expression recognition based on the analysis of the gradients distribution, on a single image, in order to characterize the face deformation in different expressions. Firstly, an accurate investigation of optimal HOG parameters has been done. Successively, a wide experimental session has been performed demonstrating the higher detection rate with respect to other State-of-the-Art methods. Moreover, an on-line testing session has been added in order to prove the robustness of our approach in real environments.
- Published
- 2015
- Full Text
- View/download PDF
3. Improved performance in facial expression recognition using 32 geometric features
- Author
-
Palestra G., Pettinicchio A., Del Coco M., Carcagni P., Leo M., and Distante C.
- Subjects
Facial expression recognition ,Human-computer interaction ,Geometric features ,Random forest - Abstract
Automatic facial expression recognition is one of the most interesting problem as it impacts on important applications in human-computer interaction area. Many applications in this field require real-time performance but not all the approach are suitable to satisfy this requirement. Geometrical features are usually the most light in terms of computational load but sometimes they exploits a huge number of features and do not cover all the possible geometrical aspect. In order to face up this problem, we propose an automatic pipeline for facial expression recognition that exploits a new set of 32 geometric facial features from a single face side covering a wide set of geometrical peculiarities. As a results, the proposed approach showed a facial expression recognition accuracy of 95,46% with a six-class expression set and an accuracy of 94,24% with a seven-class expression set.
- Published
- 2015
- Full Text
- View/download PDF
4. A Study for Evaluating Visual Exploration in ASD Children
- Author
-
Adamo F., Cazzato D., Distante C., Leo M., Palestra G. C, and Pioggia G.
- Published
- 2014
5. Non-intrusive and calibration free visual exploration analysis in children with autism spectrum disorder
- Author
-
Cazzato, D., Adamo, F., Palestra, G., Crifaci, G., Pennisi, P., Giovanni Pioggia, Ruta, L., Leo, M., and Distante, C.
- Subjects
gaze analysis ,Autism ,assistive technology - Abstract
Assistive technology is a generic system that is used to increase, help or improve the functional capabilities of people with disability. Recently, its employment has generated innovative solutions also in the field of Autism Spectrum Disorder (ASD), where it is extremely challenging to obtain feedback or to extract meaningful data. In this work, a study about the possibility to understand the visual exploration in children with ASD is presented. In order to obtain an automatic evaluation, an algorithm for free gaze estimation is employed. The proposed gaze estimation method can work without constrains nor using additional hardware, IR light sources or other intrusive methods. Furthermore, no initial calibration is required. These relaxations of the constraints makes the technique particularly suitable to be used in the critical context of autism, where the child is certainly not inclined to employ invasive devices. In particular, the technique is used in a scenario where a closet containing specific toys, that are neatly disposed from the therapist, is opened to the child. After a brief environment exploration, the child will freely choose the desired toy that will be subsequently used during therapy. The video acquisition have been accomplished by a Microsoft Kinect sensor hidden into the closet in order to obtain both RGB and depth images, that can be processed by the estimation algorithm, therefore computing gaze tracking by intersection with data coming from the well-known initial disposition of toys. The system has been tested with children with ASD, allowing to understand their choices and preferences, letting to optimize the toy disposition for cognitive-behavioural therapy.
6. Cognitive emotions in E-learning processes and their potential relationship with students' academic adjustment
- Author
-
Francesca D'Errico, Paciello, M., Carolis, B., Vattanid, A., Palestra, G., Anzivino, G., D'Errico, Francesca, Paciello, Marinella, De Carolis, Bernardina, Vattani, Alessandro, Palestra, Giuseppe, and Anzivino, Giuseppe
- Subjects
e-learning process ,Distance education ,lcsh:LC8-6691 ,Student adjustment ,cognitive emotions ,academic adjustment ,lcsh:Special aspects of education ,COGNITIVE EMOTIONS, E-LEARNING PROCESSES ,automatic detection of emotions ,Self-efficacy ,self-efficacy ,Human-computer interaction - Abstract
In times of growing importance and emphasis on improving academic outcomes for young people, their academic selves/lives are increasingly becoming more central to their understanding of their own wellbeing. How they experience and perceive their academic successes or failures, can influence their perceived self-efficacy and eventual academic achievement. To this end, ‘cognitive emotions’, elicited to acquire or develop new skills/knowledges, can play a crucial role as they indicate the state or the “flow” of a student’s emotions, when facing challenging tasks. Within innovative teaching models, measuring the affective components of learning have been mainly based on self-reports and scales which have neglected the real-time detection of emotions, through for example, recording or measuring facial expressions. The aim of the present study is to test the reliability of an ad hoc software trained to detect and classify cognitive emotions from facial expressions across two different environments, namely a video-lecture and a chat with teacher, and to explore cognitive emotions in relation to academic e-selfefficacy and academic adjustment. To pursue these goals, we used video-recordings of ten psychology students from an online university engaging in online learning tasks, and employed software to automatically detect eleven cognitive emotions. Preliminary results support and extend prior studies, illustrating how exploring cognitive emotions in real time can inform the development and success of academic e-learning interventions aimed at monitoring and promoting students’ wellbeing., peer-reviewed
7. Assessing student engagement from facial behavior in on-line learning.
- Author
-
Buono P, De Carolis B, D'Errico F, Macchiarulo N, and Palestra G
- Abstract
The automatic monitoring and assessment of the engagement level of learners in distance education may help in understanding problems and providing personalized support during the learning process. This article presents a research aiming to investigate how student engagement level can be assessed from facial behavior and proposes a model based on Long Short-Term Memory (LSTM) networks to predict the level of engagement from facial action units, gaze, and head poses. The dataset used to learn the model is the one of the EmotiW 2019 challenge datasets. In order to test its performance in learning contexts, an experiment, involving students attending an online lecture, was performed. The aim of the study was to compare the self-evaluation of the engagement perceived by the students with the one assessed by the model. During the experiment we collected videos of students behavior and, at the end of each session, we asked students to answer a questionnaire for assessing their perceived engagement. Then, the collected videos were analyzed automatically with a software that implements the model and provides an interface for the visual analysis of the model outcome. Results show that, globally, engagement prediction from students' facial behavior was weakly correlated to their subjective answers. However, when considering only the emotional dimension of engagement, this correlation is stronger and the analysis of facial action units and head pose (facial movements) are positively correlated with it, while there is an inverse correlation with the gaze, meaning that the more the student's feels engaged the less are the gaze movements., Competing Interests: Competing interestsThe authors have no competing interests to declare that are relevant to the content of this article., (© The Author(s) 2022.)
- Published
- 2023
- Full Text
- View/download PDF
8. Adolescents with borderline personality disorder show a higher response to stress but a lack of self-perception: Evidence through affective computing.
- Author
-
Bourvis N, Aouidad A, Spodenkiewicz M, Palestra G, Aigrain J, Baptista A, Benoliel JJ, Chetouani M, and Cohen D
- Subjects
- Adolescent, Female, Humans, Hydrocortisone analysis, Machine Learning, Male, Mathematics, Borderline Personality Disorder psychology, Self Concept, Stress, Psychological psychology
- Abstract
Stress reactivity is a complex phenomenon associated with multiple and multimodal expressions and functions. Herein, we hypothesized that compared with healthy controls (HCs), adolescents with borderline personality disorder (BPD) would exhibit a stronger response to stressors and a deficit in self-perception of stress due to their lack of insight. Twenty adolescents with BPD and 20 matched HCs performed a socially evaluated mental arithmetic test to induce stress. We assessed self- and heteroperception using both human ratings and affective computing-based methods for the automatic extraction of 39 behavioral features (2D + 3D video recording) and 62 physiological features (Nexus-10 recording). Predictions were made using machine learning. In addition, salivary cortisol was measured. Human ratings showed that adolescents with BPD experienced more stress than HCs. Human ratings and automated machine learning indicated opposite results regarding self- and heteroperceived stress in adolescents with BPD compared to HCs. Adolescents with BPD had higher levels of heteroperceived stress than self-perceived stress. Similarly, affective computing achieved better classification for heteroperceived stress. HCs had an opposite profile; they had higher levels of self-perceived stress, and affective computing reached a better classification for self-perceived stress. We conclude that adolescents with BPD are more sensitive to stress and show a lack of self-perception (or insight). In terms of clinical implications, our affective computing measures may help distinguish hetero- vs. self-perceptions of stress in natural settings and may offer external feedback during therapeutic interaction., (Copyright © 2020 Elsevier Inc. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
9. Behavior and interaction imaging at 9 months of age predict autism/intellectual disability in high-risk infants with West syndrome.
- Author
-
Ouss L, Palestra G, Saint-Georges C, Leitgel Gille M, Afshar M, Pellerin H, Bailly K, Chetouani M, Robel L, Golse B, Nabbout R, Desguerre I, Guergova-Kuras M, and Cohen D
- Subjects
- Child, Humans, Infant, Speech, Autism Spectrum Disorder, Autistic Disorder, Intellectual Disability, Spasms, Infantile
- Abstract
Automated behavior analysis are promising tools to overcome current assessment limitations in psychiatry. At 9 months of age, we recorded 32 infants with West syndrome (WS) and 19 typically developing (TD) controls during a standardized mother-infant interaction. We computed infant hand movements (HM), speech turn taking of both partners (vocalization, pause, silences, overlap) and motherese. Then, we assessed whether multimodal social signals and interactional synchrony at 9 months could predict outcomes (autism spectrum disorder (ASD) and intellectual disability (ID)) of infants with WS at 4 years. At follow-up, 10 infants developed ASD/ID (WS+). The best machine learning reached 76.47% accuracy classifying WS vs. TD and 81.25% accuracy classifying WS+ vs. WS-. The 10 best features to distinguish WS+ and WS- included a combination of infant vocalizations and HM features combined with synchrony vocalization features. These data indicate that behavioral and interaction imaging was able to predict ASD/ID in high-risk children with WS.
- Published
- 2020
- Full Text
- View/download PDF
10. ICT and autism care: state of the art.
- Author
-
Grossard C, Palestra G, Xavier J, Chetouani M, Grynszpan O, and Cohen D
- Subjects
- Child, Humans, Autism Spectrum Disorder rehabilitation, Cognitive Remediation instrumentation, Communication, Facial Expression, Robotics, Social Skills, Video Games
- Abstract
Purpose of Review: Over the past 10 years, the use of information and communication technologies (ICTs) has increased in regard to the treatment of individuals with autism spectrum disorders (ASDs). ICT support mechanisms (e.g. computers, laptops, robots) are particularly attractive and are adapted to children with ASD. In addition, ICT algorithms can offer new perspectives for clinicians, outside direct apps or gaming proposals. Here, we will focus on the use of serious games and robots because of their attractiveness and their value in working on social skills., Recent Findings: The latest knowledge regarding the use of ICT in the forms of serious games and robotics applied to individuals with ASD shows that the field of serious games has already achieved interesting and promising results, although the clinical validations are not always complete. In the field of robotics, there are still many limitations on the use of ICT (e.g. most interaction are similar to the wizard of Oz), and questions remain concerning their eventual effectiveness., Summary: To describe the implications of the findings for clinical practice or research, we describe two large projects, namely, JEMImE and Michelangelo, as examples of current studies that are aimed at enhancing social skills in children with ASD by including novel algorithms with clinical insights in robots or serious games.
- Published
- 2018
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.