2 code implementations • 6 Aug 2022 • David Macêdo
This thesis tackles the defiant out-of-distribution detection task by proposing novel loss functions and detection scores.
1 code implementation • 12 May 2022 • David Macêdo, Cleber Zanchettin, Teresa Ludermir
In this paper, we propose training deterministic neural networks using our DisMax loss, which works as a drop-in replacement for the usual SoftMax loss (i. e., the combination of the linear output layer, the SoftMax activation, and the cross-entropy loss).
no code implementations • 3 Nov 2021 • Willams Costa, David Macêdo, Cleber Zanchettin, Lucas S. Figueiredo, Veronica Teichrieb
Expressing and identifying emotions through facial and physical expressions is a significant part of social interaction.
1 code implementation • 30 May 2021 • David Macêdo, Teresa Ludermir
The IsoMax loss works as a drop-in replacement of the SoftMax loss (i. e., the combination of the output linear layer, the SoftMax activation, and the cross-entropy loss) because swapping the SoftMax loss with the IsoMax loss requires no changes in the model's architecture or training procedures/hyperparameters.
no code implementations • NeurIPS 2021 • David Macêdo, Teresa Ludermir
The entropic out-of-distribution detection solution comprises the IsoMax loss for training and the entropic score for out-of-distribution detection.
no code implementations • 17 Feb 2021 • David Macêdo, Pedro Dreyer, Teresa Ludermir, Cleber Zanchettin
We compared the proposed approach with commonly used adaptive learning rate schedules such as Adam, RMSProp, and Adagrad.
1 code implementation • 18 Sep 2020 • Paulo Freitas de Araujo-Filho, Georges Kaddoum, Divanilson R. Campelo, Aline Gondim Santos, David Macêdo, and Cleber Zanchettin
In this paper, we propose FID-GAN, a novel fog-based, unsupervised intrusion detection system (IDS) for CPSs using GANs.
1 code implementation • 16 Aug 2020 • Angel Ayala, Bruno Fernandes, Francisco Cruz, David Macêdo, Adriano L. I. Oliveira, Cleber Zanchettin
The experiments show that our model keeps high accuracy while substantially reducing the number of parameters and flops.
2 code implementations • 7 Jun 2020 • David Macêdo, Tsang Ing Ren, Cleber Zanchettin, Adriano L. I. Oliveira, Teresa Ludermir
In this paper, we argue that the unsatisfactory out-of-distribution (OOD) detection performance of neural networks is mainly due to the SoftMax loss anisotropy and propensity to produce low entropy probability distributions in disagreement with the principle of maximum entropy.
1 code implementation • 29 Apr 2020 • Johny Moreira, Chaina Oliveira, David Macêdo, Cleber Zanchettin, Luciano Barbosa
Considering that this method outperformed state-of-the-art baselines, in this paper, we propose a related approach to RESIDE also using additional side information, but simplifying the sentence encoding with BERT embeddings.
1 code implementation • 3 Apr 2020 • Ricardo Batista das Neves Junior, Luiz Felipe Verçosa, David Macêdo, Byron Leite Dantas Bezerra, Cleber Zanchettin
In this context, we investigated a method based on U-Net to detect the document edges and text regions in ID images.
3 code implementations • 31 Mar 2020 • João Antônio Chagas Nunes, David Macêdo, Cleber Zanchettin
To address this demand, we propose a portable model called Additive Margin MobileNet1D (AM-MobileNet1D) to Speaker Identification on mobile devices.
2 code implementations • 30 Mar 2020 • Heitor Felix, Walber M. Rodrigues, David Macêdo, Francisco Simões, Adriano L. I. Oliveira, Veronica Teichrieb, Cleber Zanchettin
We used the LINEMOD dataset to evaluate the proposed method, and the experimental results show that the proposed method reduces the memory requirement by almost 99\% in comparison to the original architecture with the cost of reducing half the accuracy in one of the metrics.
1 code implementation • 15 Aug 2019 • David Macêdo, Tsang Ing Ren, Cleber Zanchettin, Adriano L. I. Oliveira, Teresa Ludermir
Consequently, we propose IsoMax, a loss that is isotropic (distance-based) and produces high entropy (low confidence) posterior probability distributions despite still relying on cross-entropy minimization.
no code implementations • 31 Jan 2019 • Cleison Correia de Amorim, David Macêdo, Cleber Zanchettin
The recognition of sign language is a challenging task with an important role in society to facilitate the communication of deaf persons.
1 code implementation • 28 Jan 2019 • Andréa B. Duque, Luã Lázaro J. Santos, David Macêdo, Cleber Zanchettin
Most of the research in convolutional neural networks has focused on increasing network depth to improve accuracy, resulting in a massive number of parameters which restricts the trained network to platforms with memory and processing constraints.
Ranked #17 on
Sentiment Analysis
on Yelp Fine-grained classification
1 code implementation • 28 Jan 2019 • Jefferson L. P. Lima, David Macêdo, Cleber Zanchettin
As in most health problems, the imbalance between examples and classes is predominant in this problem and affects the performance of the automated solution.
1 code implementation • 28 Jan 2019 • João Antônio Chagas Nunes, David Macêdo, Cleber Zanchettin
The Softmax loss function is a widely used function in deep learning methods, but it is not the best choice for all kind of problems.
2 code implementations • 20 Jan 2019 • Jader Abreu, Luis Fred, David Macêdo, Cleber Zanchettin
Document classification is a challenging task with important applications.
Ranked #1 on
Text Classification
on Yelp-5
no code implementations • ICLR 2018 • David Macêdo, Cleber Zanchettin, Adriano L. I. Oliveira, Teresa Ludermir
Besides, statistical significant performance assessments (p<0. 05) showed DReLU enhanced the test accuracy presented by ReLU in all scenarios.
no code implementations • ICLR 2018 • David Macêdo, Cleber Zanchettin, Teresa Ludermir
The quality of the features used in visual recognition is of fundamental importance for the overall system.