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Your search keyword '"NAPPI, Michele"' showing total 366 results
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366 results on '"NAPPI, Michele"'

3. Language identification as improvement for lip-based biometric visual systems

Author

Cascone, Lucia, Nappi, Michele, and Narducci, Fabio

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Artificial Intelligence
Abstract

Language has always been one of humanity's defining characteristics. Visual Language Identification (VLI) is a relatively new field of research that is complex and largely understudied. In this paper, we present a preliminary study in which we use linguistic information as a soft biometric trait to enhance the performance of a visual (auditory-free) identification system based on lip movement. We report a significant improvement in the identification performance of the proposed visual system as a result of the integration of these data using a score-based fusion strategy. Methods of Deep and Machine Learning are considered and evaluated. To the experimentation purposes, the dataset called laBial Articulation for the proBlem of the spokEn Language rEcognition (BABELE), consisting of eight different languages, has been created. It includes a collection of different features of which the spoken language represents the most relevant, while each sample is also manually labelled with gender and age of the subjects.

Published
2023

5. Ollivier-Ricci Curvature For Head Pose Estimation From a Single Image

Author

Cascone, Lucia, Distasi, Riccardo, and Nappi, Michele

Subjects
Computer Science - Computer Vision and Pattern Recognition, Computer Science - Machine Learning
Abstract

Head pose estimation is a crucial challenge for many real-world applications, such as attention and human behavior analysis. This paper aims to estimate head pose from a single image by applying notions of network curvature. In the real world, many complex networks have groups of nodes that are well connected to each other with significant functional roles. Similarly, the interactions of facial landmarks can be represented as complex dynamic systems modeled by weighted graphs. The functionalities of such systems are therefore intrinsically linked to the topology and geometry of the underlying graph. In this work, using the geometric notion of Ollivier-Ricci curvature (ORC) on weighted graphs as input to the XGBoost regression model, we show that the intrinsic geometric basis of ORC offers a natural approach to discovering underlying common structure within a pool of poses. Experiments on the BIWI, AFLW2000 and Pointing'04 datasets show that the ORC_XGB method performs well compared to state-of-the-art methods, both landmark-based and image-only.

Published
2022

11. Depth Camera Face Recognition by Normalized Fractal Encodings

Author

Bilotti, Umberto, Bisogni, Carmen, Nappi, Michele, Pero, Chiara, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Foresti, Gian Luca, editor, Fusiello, Andrea, editor, and Hancock, Edwin, editor

Published
2023
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18. HP2IFS: Head Pose estimation exploiting Partitioned Iterated Function Systems

Author

Bisogni, Carmen, Nappi, Michele, Pero, Chiara, and Ricciardi, Stefano

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Estimating the actual head orientation from 2D images, with regard to its three degrees of freedom, is a well known problem that is highly significant for a large number of applications involving head pose knowledge. Consequently, this topic has been tackled by a plethora of methods and algorithms the most part of which exploits neural networks. Machine learning methods, indeed, achieve accurate head rotation values yet require an adequate training stage and, to that aim, a relevant number of positive and negative examples. In this paper we take a different approach to this topic by using fractal coding theory and particularly Partitioned Iterated Function Systems to extract the fractal code from the input head image and to compare this representation to the fractal code of a reference model through Hamming distance. According to experiments conducted on both the BIWI and the AFLW2000 databases, the proposed PIFS based head pose estimation method provides accurate yaw/pitch/roll angular values, with a performance approaching that of state of the art of machine-learning based algorithms and exceeding most of non-training based approaches.

Published
2020

22. Fusion of Periocular Deep Features in a Dual-Input CNN for Biometric Recognition

Author

Abate, Andrea, Cimmino, Lucia, Nappi, Michele, Narducci, Fabio, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Sclaroff, Stan, editor, Distante, Cosimo, editor, Leo, Marco, editor, Farinella, Giovanni M., editor, and Tombari, Federico, editor

Published
2022
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36. Editor-in-Chief

Author

Abbott, Derek, primary, Aissa, Sonia, additional, Annaswamy, Anuradha, additional, Ansari, Nirwan, additional, Cai, Jun, additional, Chen, Kun-Shan, additional, Chen, Yixin, additional, Chiao, J.-C., additional, El-Baz, Ayman, additional, Fattah, Shaikh, additional, Gooi, Hoay, additional, Gokhale, Maya, additional, Ⅰ, Chih-Lin, additional, Iannaccone, Giuseppe, additional, Iwashita, Yumi, additional, Jacob, Bruce, additional, Jamalipour, Abbas, additional, Javidi, Bahram, additional, Jiang, Weihua, additional, Kaynak, Okyay, additional, Kirkici, Hulya, additional, Lambert-Torres, Germano, additional, Li, Shengtao, additional, Mrozowski, Michal, additional, Nappi, Michele, additional, Novak, Dalma, additional, Proença, Hugo, additional, Qian, Yi, additional, Qu, Zhihua, additional, Rahardja, Susanto, additional, Saif, Mehrdad, additional, Serpengüzel, Ali, additional, Siegel, Peter H., additional, Trebi-Ollennu, Ashitey, additional, Tuninetti, Daniela, additional, Wang, Ge, additional, Wear, Keith A., additional, Weisshaar, Andreas, additional, Yue, C. Patrick, additional, and Zio, Enrico, additional

Published
2024
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38. Gotcha-I: A Multiview Human Videos Dataset

Author

Barra, Paola, Bisogni, Carmen, Nappi, Michele, Freire-Obregón, David, Castrillón-Santana, Modesto, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Thampi, Sabu M., editor, Martinez Perez, Gregorio, editor, Ko, Ryan, editor, and Rawat, Danda B., editor

Published
2020
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39. Energy Awareness and Secure Communication Protocols: The Era of Green Cybersecurity

Author

Castaldo, Marco, Castiglione, Aniello, Masucci, Barbara, Nappi, Michele, Pero, Chiara, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Thampi, Sabu M., editor, Martinez Perez, Gregorio, editor, Ko, Ryan, editor, and Rawat, Danda B., editor

Published
2020
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43. Dependable Person Recognition by Means of Local Descriptors of Dynamic Facial Features

Author

Castiglione, Aniello, Grazioli, Giampiero, Iengo, Simone, Nappi, Michele, Ricciardi, Stefano, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Wang, Guojun, editor, Bhuiyan, Md Zakirul Alam, editor, De Capitani di Vimercati, Sabrina, editor, and Ren, Yizhi, editor

Published
2019
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44. Towards the Design of a Covert Channel by Using Web Tracking Technologies

Author

Castiglione, Aniello, Nappi, Michele, Pero, Chiara, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Wang, Guojun, editor, Bhuiyan, Md Zakirul Alam, editor, De Capitani di Vimercati, Sabrina, editor, and Ren, Yizhi, editor

Published
2019
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45. Gait Analysis for Gender Classification in Forensics

Author

Barra, Paola, Bisogni, Carmen, Nappi, Michele, Freire-Obregón, David, Castrillón-Santana, Modesto, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Wang, Guojun, editor, Bhuiyan, Md Zakirul Alam, editor, De Capitani di Vimercati, Sabrina, editor, and Ren, Yizhi, editor

Published
2019
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46. Transfer Learning for Facial Attributes Prediction and Clustering

Author

Anzalone, Luca, Barra, Paola, Barra, Silvio, Narducci, Fabio, Nappi, Michele, Barbosa, Simone Diniz Junqueira, Editorial Board Member, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Kotenko, Igor, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Wang, Guojun, editor, El Saddik, Abdulmotaleb, editor, Lai, Xuejia, editor, Martinez Perez, Gregorio, editor, and Choo, Kim-Kwang Raymond, editor

Published
2019
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47. MICHE Competitions: A Realistic Experience with Uncontrolled Eye Region Acquisition

Author

Barra, Silvio, De Marsico, Maria, Proença, Hugo, Nappi, Michele, Kang, Sing Bing, Series Editor, Singh, Sameer, Founding Editor, Bischof, Horst, Advisory Editor, Bowden, Richard, Advisory Editor, Dickinson, Sven, Advisory Editor, Jia, Jiaya, Advisory Editor, Lee, Kyoung Mu, Advisory Editor, Sato, Yoichi, Advisory Editor, Schiele, Bernt, Advisory Editor, Sclaroff, Stan, Advisory Editor, Rattani, Ajita, editor, Derakhshani, Reza, editor, and Ross, Arun, editor

Published
2019
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