no code implementations • 6 Apr 2025 • Michal Tešnar, Bilal Wehbe, Matias Valdenegro-Toro
We also conducted detailed analyses on the impact of model parameters and storage size on the performance of the models, as well as a comparison of three different uncertainty estimation methods.
no code implementations • 4 Apr 2025 • Mirko Borszukovszki, Ivo Pascal de Jong, Matias Valdenegro-Toro
To leverage the full potential of Large Language Models (LLMs) it is crucial to have some information on their answers' uncertainty.
no code implementations • 28 Mar 2025 • Matias Valdenegro-Toro, Deepan Chakravarthi Padmanabhan, Deepak Singh, Bilal Wehbe, Yvan Petillot
Sonar sensing is fundamental for underwater robotics, but limited by capabilities of AI systems, which need large training datasets.
1 code implementation • 21 Jan 2025 • Josh Bruegger, Diana Ioana Catana, Vanja Macovaz, Matias Valdenegro-Toro, Matthia Sabatelli, Marco Zullich
The attribution of the author of an art piece is typically a laborious manual process, usually relying on subjective evaluations of expert figures.
no code implementations • 14 Jan 2025 • Matias Valdenegro-Toro, Marco Zullich
Inputs to machine learning models can have associated noise or uncertainties, but they are often ignored and not modelled.
no code implementations • 19 Dec 2024 • Eric Brouwer, Jan Erik van Woerden, Gertjan Burghouts, Matias Valdenegro-Toro, Marco Zullich
Few-shot, fine-grained classification in computer vision poses significant challenges due to the need to differentiate subtle class distinctions with limited data.
no code implementations • 19 Dec 2024 • Maniraj Sai Adapa, Marco Zullich, Matias Valdenegro-Toro
Deep Learning-based image super-resolution (SR) has been gaining traction with the aid of Generative Adversarial Networks.
no code implementations • 3 Oct 2024 • Valentijn Oldenburg, Juan Cardenas-Cartagena, Matias Valdenegro-Toro
In this proof-of-concept study, we conduct multivariate timeseries forecasting for the concentrations of nitrogen dioxide (NO2), ozone (O3), and (fine) particulate matter (PM10 & PM2. 5) with meteorological covariates between two locations using various deep learning models, with a focus on long short-term memory (LSTM) and gated recurrent unit (GRU) architectures.
no code implementations • 22 Aug 2024 • Ivo Pascal de Jong, Andreea Ioana Sburlea, Matias Valdenegro-Toro
This work proposes a set of experiments to evaluate disentanglement of aleatoric and epistemic uncertainty, and uses these methods to compare two competing formulations for disentanglement (the Information Theoretic approach, and the Gaussian Logits approach).
no code implementations • 20 Aug 2024 • Matias Valdenegro-Toro, Radina Stoykova
The AI act is the European Union-wide regulation of AI systems.
no code implementations • 3 Jul 2024 • Mariela De Lucas Álvarez, Jichen Guo, Raul Domínguez, Matias Valdenegro-Toro
Terrain Classification is an essential task in space exploration, where unpredictable environments are difficult to observe using only exteroceptive sensors such as vision.
no code implementations • 26 Jun 2024 • Matias Valdenegro-Toro, Ivo Pascal de Jong, Marco Zullich
Modelling uncertainty in Machine Learning models is essential for achieving safe and reliable predictions.
no code implementations • 5 May 2024 • Tobias Groot, Matias Valdenegro-Toro
Language and Vision-Language Models (LLMs/VLMs) have revolutionized the field of AI by their ability to generate human-like text and understand images, but ensuring their reliability is crucial.
no code implementations • 8 Apr 2024 • Ahmed Faisal Abdelrahman, Matias Valdenegro-Toro, Maren Bennewitz, Paul G. Plöger
To investigate the utility of brain-inspired sensing and data processing, we developed a neuromorphic approach to obstacle avoidance on a camera-equipped manipulator.
no code implementations • 25 Mar 2024 • Matias Valdenegro-Toro, Mihir Mulye
Explanations for machine learning models can be hard to interpret or be wrong.
no code implementations • 25 Mar 2024 • Mihir Mulye, Matias Valdenegro-Toro
By computing the coefficient of variation of these distributions, we evaluate the confidence in the explanation and determine that the explanations generated using Guided Backpropagation have low uncertainty associated with them.
1 code implementation • 14 Mar 2024 • Prithviraj Manivannan, Ivo Pascal de Jong, Matias Valdenegro-Toro, Andreea Ioana Sburlea
We applied a variety of Uncertainty Quantification methods to predict misclassifications for a Motor Imagery Brain Computer Interface.
no code implementations • 14 Mar 2024 • Ivo Pascal de Jong, Lüke Luna van den Wittenboer, Matias Valdenegro-Toro, Andreea Ioana Sburlea
We demonstrate a new paradigm containing a standard calibration session and a novel BCI control session based on EMG.
1 code implementation • 12 Jan 2024 • Tsegaye Misikir Tashu, Eduard-Raul Kontos, Matthia Sabatelli, Matias Valdenegro-Toro
Recommendation systems, for documents, have become tools to find relevant content on the Web.
no code implementations • 10 Nov 2023 • Martino Pelucchi, Matias Valdenegro-Toro
This paper aims to join the growing literature regarding ChatGPT's abilities by focusing on its performance in high-resource languages and on its capacity to predict its answers' accuracy by giving a confidence level.
no code implementations • 4 Jun 2023 • Deepan Chakravarthi Padmanabhan, Paul G. Plöger, Octavio Arriaga, Matias Valdenegro-Toro
Adebayo et al.'s work on evaluating saliency methods for classification models illustrate certain explanation methods fail the model and data randomization tests.
1 code implementation • 21 Dec 2022 • Deepan Chakravarthi Padmanabhan, Paul G. Plöger, Octavio Arriaga, Matias Valdenegro-Toro
State-of-the-art object detectors are treated as black boxes due to their highly non-linear internal computations.
no code implementations • 11 Nov 2022 • Levente Foldesi, Matias Valdenegro-Toro
Increasingly high-stakes decisions are made using neural networks in order to make predictions.
no code implementations • 11 Nov 2022 • Kumud Lakara, Matias Valdenegro-Toro
Trusting the predictions of deep learning models in safety critical settings such as the medical domain is still not a viable option.
no code implementations • 11 Nov 2022 • Lokesh Veeramacheneni, Matias Valdenegro-Toro
We observed that Deep Ensembles out perform Flipout model in OOD detection with greater AUROC scores for both datasets.
no code implementations • 7 Sep 2022 • Matias Valdenegro-Toro, Matthia Sabatelli
Overfitting and generalization is an important concept in Machine Learning as only models that generalize are interesting for general applications.
1 code implementation • 20 Apr 2022 • Alan Preciado-Grijalva, Bilal Wehbe, Miguel Bande Firvida, Matias Valdenegro-Toro
Self-supervised learning has proved to be a powerful approach to learn image representations without the need of large labeled datasets.
no code implementations • 20 Apr 2022 • Matias Valdenegro-Toro, Daniel Saromo
Uncertainty quantification is required for many applications, and disentangled aleatoric and epistemic uncertainties are best.
no code implementations • 6 Dec 2021 • Matias Valdenegro-Toro, Daniel Harnack, Hendrik Wöhrle
Modeling trajectories generated by robot joints is complex and required for high level activities like trajectory generation, clustering, and classification.
no code implementations • 5 Dec 2021 • Aaqib Parvez Mohammed, Matias Valdenegro-Toro
Out of distribution detection for RL is generally not well covered in the literature, and there is a lack of benchmarks for this task.
Deep Reinforcement Learning
Out-of-Distribution Detection
+3
1 code implementation • NeurIPS Workshop LatinX_in_AI 2021 • Matias Valdenegro-Toro
Uncertainty quantification in neural network promises to increase safety of AI systems, but it is not clear how performance might vary with the training set size.
no code implementations • 28 Sep 2021 • Adrian Lubitz, Matias Valdenegro-Toro, Frank Kirchner
With a Convolutional Neural Network Long Short Term Memory (CNN LSTM) on facial images an accuracy of 92% was reached on the test set.
no code implementations • 19 Aug 2021 • Matias Valdenegro-Toro
Uncertainty in machine learning is not generally taught as general knowledge in Machine Learning course curricula.
1 code implementation • 15 Aug 2021 • Deepak Singh, Matias Valdenegro-Toro
This paper presents a novel dataset for marine debris segmentation collected using a Forward Looking Sonar (FLS).
no code implementations • 5 Aug 2021 • Mihir Patil, Bilal Wehbe, Matias Valdenegro-Toro
Docking control of an autonomous underwater vehicle (AUV) is a task that is integral to achieving persistent long term autonomy.
1 code implementation • 2 Aug 2021 • Matias Valdenegro-Toro, Alan Preciado-Grijalva, Bilal Wehbe
Machine learning and neural networks are now ubiquitous in sonar perception, but it lags behind the computer vision field due to the lack of data and pre-trained models specifically for sonar images.
no code implementations • 2 Aug 2021 • Arka Mallick, Paul Plöger, Matias Valdenegro-Toro
Application of underwater robots are on the rise, most of them are dependent on sonar for underwater vision, but the lack of strong perception capabilities limits them in this task.
no code implementations • 16 Apr 2021 • Matias Valdenegro-Toro
Neural networks are used for many real world applications, but often they have problems estimating their own confidence.
no code implementations • NeurIPS Workshop ICBINB 2020 • Matthias Rosynski, Frank Kirchner, Matias Valdenegro-Toro
It is being proven to what extent the algorithms can be used in the area of Reinforcement learning.
no code implementations • 23 Nov 2020 • Lauren Michelle Pfeifer, Matias Valdenegro-Toro
Around the globe, ticks are the culprit of transmitting a variety of bacterial, viral and parasitic diseases.
no code implementations • 23 Nov 2020 • Octavio Arriaga, Matias Valdenegro-Toro
Evaluating difficulty and biases in machine learning models has become of extreme importance as current models are now being applied in real-world situations.
no code implementations • 29 Oct 2020 • Mohandass Muthuraja, Octavio Arriaga, Paul Plöger, Frank Kirchner, Matias Valdenegro-Toro
In this work, we propose the use of Black-box optimization methods to tune the prior/default box scales in Faster R-CNN and SSD, using Bayesian Optimization, SMAC, and CMA-ES.
1 code implementation • 27 Oct 2020 • Octavio Arriaga, Matias Valdenegro-Toro, Mohandass Muthuraja, Sushma Devaramani, Frank Kirchner
In this paper we introduce the Perception for Autonomous Systems (PAZ) software library.
no code implementations • NeurIPS Workshop ICBINB 2020 • Akshatha Kamath, Dwaraknath Gnaneshwar, Matias Valdenegro-Toro
Through our experiments, we show a significant reduction in the GFLOPS required to model uncertainty, compared to Monte Carlo DropConnect, with marginal trade-off in performance.
no code implementations • 27 Oct 2020 • Aaqib Parvez Mohammed, Matias Valdenegro-Toro
There are multiple algorithms that solve the task in a physics engine based environment but there is no work done so far to understand if the RL algorithms can generalize across physics engines.
no code implementations • 17 Aug 2020 • Maryam Matin, Matias Valdenegro-Toro
In this paper we show that Bayesian Neural Networks, as approximated using MC-Dropout, MC-DropConnect, or an Ensemble, are able to model the aleatoric uncertainty in facial emotion recognition, and produce output probabilities that are closer to what a human expects.
no code implementations • 3 Jul 2020 • Swaroop Bhandary K, Nico Hochgeschwender, Paul Plöger, Frank Kirchner, Matias Valdenegro-Toro
Deep learning models are extensively used in various safety critical applications.
no code implementations • 29 Oct 2019 • Matias Valdenegro-Toro, Mariela De Lucas Alvarez, Mariia Dmitrieva, Bilal Wehbe, Georgios Salavasidis, Shahab Heshmati-Alamdari, Juan F. Fuentes-Pérez, Veronika Yordanova, Klemen Istenič, Thomas Guerneve
Marine and Underwater resources are important part of the economy of many countries.
2 code implementations • 17 Oct 2019 • Matias Valdenegro-Toro
Fast estimates of model uncertainty are required for many robust robotics applications.
no code implementations • 17 Jul 2019 • Nour Soufi, Matias Valdenegro-Toro
SqueezeNet is a good candidate for efficient image classification of traffic signs, but in our experiments it does not reach high accuracy, and we believe this is due to lack of data, requiring data augmentation.
no code implementations • 1 Jul 2019 • Matias Valdenegro-Toro
Detecting novel objects without class information is not trivial, as it is difficult to generalize from a small training set.
no code implementations • 13 May 2019 • Matias Valdenegro-Toro
Proper waste disposal and recycling is a must in any sustainable community, and in many coastal areas there is significant water pollution in the form of floating or submerged garbage.
1 code implementation • 28 Mar 2019 • Matias Valdenegro-Toro, Hector Pincheira
We propose a modification to Perlin noise which use computable hash functions instead of textures as lookup tables.
Graphics
no code implementations • 11 Jul 2018 • Samy Nascimento, Matias Valdenegro-Toro
Noncritical soft-faults and model deviations are a challenge for Fault Detection and Diagnosis (FDD) of resident Autonomous Underwater Vehicles (AUVs).
no code implementations • 12 May 2018 • Diego Vergara, Sergio Hernández, Matias Valdenegro-Toro, Felipe Jorquera
Estimating predictive uncertainty is crucial for many computer vision tasks, from image classification to autonomous driving systems.
no code implementations • 7 Nov 2017 • Octavio Arriaga, Paul Plöger, Matias Valdenegro-Toro
Current robot platforms are being employed to collaborate with humans in a wide range of domestic and industrial tasks.
18 code implementations • 20 Oct 2017 • Octavio Arriaga, Matias Valdenegro-Toro, Paul Plöger
In this paper we propose an implement a general convolutional neural network (CNN) building framework for designing real-time CNNs.
no code implementations • 8 Sep 2017 • Matias Valdenegro-Toro
In this work we develop a Convolutional Neural Network that can reliably score objectness of image windows in forward-looking sonar images and by thresholding objectness, we generate detection proposals.
no code implementations • 8 Sep 2017 • Matias Valdenegro-Toro
In this work, we evaluate three common decisions that need to be made by a CNN designer, namely the performance of transfer learning, the effect of object/image size and the relation between training set size.
no code implementations • 7 Sep 2017 • Matias Valdenegro-Toro
Matching sonar images with high accuracy has been a problem for a long time, as sonar images are inherently hard to model due to reflections, noise and viewpoint dependence.
no code implementations • 7 Sep 2017 • Matias Valdenegro-Toro
Deep Neural Networks have impressive classification performance, but this comes at the expense of significant computational resources at inference time.