no code implementations • 16 Jun 2023 • Paulo R. Lisboa de Almeida, Jeovane Honório Alves, Luiz S. Oliveira, Andre Gustavo Hochuli, João V. Fröhlich, Rodrigo A. Krauel
Smart-parking solutions use sensors, cameras, and data analysis to improve parking efficiency and reduce traffic congestion.
1 code implementation • 24 May 2022 • Fabrício Ceschin, Marcus Botacin, Heitor Murilo Gomes, Felipe Pinagé, Luiz S. Oliveira, André Grégio
This constant evolution of malware samples causes changes to the data distribution (i. e., concept drifts) that directly affect ML model detection rates, something not considered in the majority of the literature work.
no code implementations • 3 Nov 2020 • Marcos Monteiro, Alceu S. Britto Jr, Jean P. Barddal, Luiz S. Oliveira, Robert Sabourin
This paper describes a classifier pool generation method guided by the diversity estimated on the data complexity and classifier decisions.
no code implementations • 30 Oct 2020 • Fabrício Ceschin, Marcus Botacin, Albert Bifet, Bernhard Pfahringer, Luiz S. Oliveira, Heitor Murilo Gomes, André Grégio
Machine Learning (ML) has been widely applied to cybersecurity and is considered state-of-the-art for solving many of the open issues in that field.
no code implementations • 29 Oct 2020 • Andre G. Hochuli, Alceu S. Britto Jr, David A. Saji, Jose M. Saavedra, Robert Sabourin, Luiz S. Oliveira
Over the last decades, most approaches proposed for handwritten digit string recognition (HDSR) have resorted to digit segmentation, which is dominated by heuristics, thereby imposing substantial constraints on the final performance.
no code implementations • 13 Oct 2020 • Teruo M. Maruyama, Luiz S. Oliveira, Alceu S. Britto Jr, Robert Sabourin
The method is used to generate offline signatures in the image and the feature space and train an ASVS.
no code implementations • 13 Oct 2020 • Mariana Y. Noguti, Eduardo Vellasques, Luiz S. Oliveira
In recent years, there has been an increased interest in the application of Natural Language Processing (NLP) to legal documents.
1 code implementation • 21 Sep 2020 • Lucas O. Teixeira, Rodolfo M. Pereira, Diego Bertolini, Luiz S. Oliveira, Loris Nanni, George D. C. Cavalcanti, Yandre M. G. Costa
We assessed the impact of creating a CXR image database from different sources, and the COVID-19 generalization from one source to another.
Computed Tomography (CT) Explainable artificial intelligence +2
no code implementations • 18 May 2020 • Fabio Pinhelli, Alceu S. Britto Jr, Luiz S. Oliveira, Yandre M. G. Costa, Diego Bertolini
The writing can be used as an important biometric modality which allows to unequivocally identify an individual.
no code implementations • 21 Nov 2019 • Luiz A. Zanlorensi, Rayson Laroca, Eduardo Luz, Alceu S. Britto Jr., Luiz S. Oliveira, David Menotti
The use of the iris and periocular region as biometric traits has been extensively investigated, mainly due to the singularity of the iris features and the use of the periocular region when the image resolution is not sufficient to extract iris information.
1 code implementation • 17 Oct 2019 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
This is particularly challenging for skilled forgeries, where a forger practices imitating the user's signature, and often is able to create forgeries visually close to the original signatures.
no code implementations • 22 Jun 2019 • Kelly L. Wiggers, Alceu S. Britto Jr., Laurent Heutte, Alessandro L. Koerich, Luiz S. Oliveira
This paper presents a novel approach for image retrieval and pattern spotting in document image collections.
no code implementations • 9 Apr 2019 • Thiago J. M. Moura, George D. C. Cavalcanti, Luiz S. Oliveira
Three DRS systems were compared against individual regressor and static systems that use the Mean and the Median to combine the outputs of the regressors from the ensemble.
2 code implementations • 10 Jan 2019 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
The phenomenon of Adversarial Examples is attracting increasing interest from the Machine Learning community, due to its significant impact to the security of Machine Learning systems.
5 code implementations • 23 Nov 2018 • Jérôme Rony, Luiz G. Hafemann, Luiz S. Oliveira, Ismail Ben Ayed, Robert Sabourin, Eric Granger
Research on adversarial examples in computer vision tasks has shown that small, often imperceptible changes to an image can induce misclassification, which has security implications for a wide range of image processing systems.
no code implementations • 29 Aug 2018 • Luiz A. Zanlorensi, Eduardo Luz, Rayson Laroca, Alceu S. Britto Jr., Luiz S. Oliveira, David Menotti
The use of iris as a biometric trait is widely used because of its high level of distinction and uniqueness.
1 code implementation • 2 Apr 2018 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
Methods for learning feature representations for Offline Handwritten Signature Verification have been successfully proposed in recent literature, using Deep Convolutional Neural Networks to learn representations from signature pixels.
2 code implementations • 26 Feb 2018 • Rayson Laroca, Evair Severo, Luiz A. Zanlorensi, Luiz S. Oliveira, Gabriel Resende Gonçalves, William Robson Schwartz, David Menotti
First, in the SSIG dataset, composed of 2, 000 frames from 101 vehicle videos, our system achieved a recognition rate of 93. 53% and 47 Frames Per Second (FPS), performing better than both Sighthound and OpenALPR commercial systems (89. 80% and 93. 03%, respectively) and considerably outperforming previous results (81. 80%).
Ranked #2 on License Plate Recognition on SSIG-SegPlate
no code implementations • 12 Sep 2017 • Paulo R. Cavalin, Marcelo N. Kapp, Luiz S. Oliveira
This work focuses on cost reduction methods for forest species recognition systems.
4 code implementations • 16 May 2017 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
Verifying the identity of a person using handwritten signatures is challenging in the presence of skilled forgeries, where a forger has access to a person's signature and deliberately attempt to imitate it.
no code implementations • 15 Jul 2016 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
Research on Offline Handwritten Signature Verification explored a large variety of handcrafted feature extractors, ranging from graphology, texture descriptors to interest points.
no code implementations • 4 Apr 2016 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
Automatic Offline Handwritten Signature Verification has been researched over the last few decades from several perspectives, using insights from graphology, computer vision, signal processing, among others.
no code implementations • 28 Jul 2015 • Luiz G. Hafemann, Robert Sabourin, Luiz S. Oliveira
The area of Handwritten Signature Verification has been broadly researched in the last decades, but remains an open research problem.
no code implementations • Expert Systems with Applications 2015 • Paulo R.L. de Almeida, Luiz S. Oliveira, Alceu S. Britto Jr., Eunelson J. Silva Jr., Alessandro L. Koerich
To mitigate this difficulty, in this paper we introduce a new parking lot dataset composed of 695, 899 images captured from two parking lots with three different camera views.