no code implementations • 29 Jun 2024 • David F. Ramirez, Deep Pujara, Cihan Tepedelenlioglu, Devarajan Srinivasan, Andreas Spanias
We demonstrate our infrared thermography data collection approach, the PV thermal imagery benchmark dataset, and the measured performance of image processing transformations, including the Hough Transform for PV segmentation.
1 code implementation • 1 Aug 2023 • Grace Billingsley, Julia Dietlmeier, Vivek Narayanaswamy, Andreas Spanias, Noel E. OConnor
We compare our results against the state-of-the-art on this dataset and show that by integrating l2-normalized spatial attention into a baseline network we achieve a performance gain of 1. 79 percentage points.
no code implementations • 21 Nov 2022 • David Ramirez, Suren Jayasuriya, Andreas Spanias
3D reconstruction algorithms should utilize the low cost and pervasiveness of video camera sensors, from both overhead and soldier-level perspectives.
no code implementations • 12 Jul 2022 • Vivek Narayanaswamy, Yamen Mubarka, Rushil Anirudh, Deepta Rajan, Andreas Spanias, Jayaraman J. Thiagarajan
We focus on the problem of producing well-calibrated out-of-distribution (OOD) detectors, in order to enable safe deployment of medical image classifiers.
no code implementations • 17 Dec 2021 • Odrika Iqbal, Victor Isaac Torres Muro, Sameeksha Katoch, Andreas Spanias, Suren Jayasuriya
Our adaptive subsampling algorithms comprise an object detector and an ROI predictor (Kalman filter) which operate in conjunction to optimize the energy efficiency of the vision pipeline with the end task being object tracking.
no code implementations • NeurIPS 2021 • Jayaraman J. Thiagarajan, Vivek Narayanaswamy, Deepta Rajan, Jason Liang, Akshay Chaudhari, Andreas Spanias
Explanation techniques that synthesize small, interpretable changes to a given image while producing desired changes in the model prediction have become popular for introspecting black-box models.
1 code implementation • 14 Apr 2021 • Vivek Sivaraman Narayanaswamy, Jayaraman J. Thiagarajan, Andreas Spanias
Unsupervised deep learning methods for solving audio restoration problems extensively rely on carefully tailored neural architectures that carry strong inductive biases for defining priors in the time or spectral domain.
no code implementations • 5 Mar 2021 • Vivek Narayanaswamy, Jayaraman J. Thiagarajan, Deepta Rajan, Andreas Spanias
With increased interest in adopting AI methods for clinical diagnosis, a vital step towards safe deployment of such tools is to ensure that the models not only produce accurate predictions but also do not generalize to data regimes where the training data provide no meaningful evidence.
no code implementations • 22 Oct 2020 • Vivek Narayanaswamy, Jayaraman J. Thiagarajan, Andreas Spanias
Through the use of carefully tailored convolutional neural network architectures, a deep image prior (DIP) can be used to obtain pre-images from latent representation encodings.
no code implementations • 30 Sep 2020 • Uday Shankar Shanthamallu, Jayaraman J. Thiagarajan, Andreas Spanias
In this work, we propose Uncertainty Matching GNN (UM-GNN), that is aimed at improving the robustness of GNN models, particularly against poisoning attacks to the graph structure, by leveraging epistemic uncertainties from the message passing framework.
no code implementations • 30 Sep 2020 • Jayaraman J. Thiagarajan, Vivek Narayanaswamy, Rushil Anirudh, Peer-Timo Bremer, Andreas Spanias
With increasing reliance on the outcomes of black-box models in critical applications, post-hoc explainability tools that do not require access to the model internals are often used to enable humans understand and trust these models.
1 code implementation • 28 May 2020 • Vivek Narayanaswamy, Jayaraman J. Thiagarajan, Rushil Anirudh, Andreas Spanias
State-of-the-art under-determined audio source separation systems rely on supervised end-end training of carefully tailored neural network architectures operating either in the time or the spectral domain.
no code implementations • 24 Nov 2019 • Sameeksha Katoch, Kowshik Thopalli, Jayaraman J. Thiagarajan, Pavan Turaga, Andreas Spanias
Exploiting known semantic relationships between fine-grained tasks is critical to the success of recent model agnostic approaches.
no code implementations • 8 Apr 2019 • Vivek Sivaraman Narayanaswamy, Sameeksha Katoch, Jayaraman J. Thiagarajan, Huan Song, Andreas Spanias
We also investigate the impact of dense connections on the extraction process that encourage feature reuse and better gradient flow.
no code implementations • 1 Nov 2018 • Vivek Sivaraman Narayanaswamy, Jayaraman J. Thiagarajan, Huan Song, Andreas Spanias
State-of-the-art speaker diarization systems utilize knowledge from external data, in the form of a pre-trained distance metric, to effectively determine relative speaker identities to unseen data.
no code implementations • 1 Nov 2018 • Uday Shankar Shanthamallu, Jayaraman J. Thiagarajan, Andreas Spanias
Machine learning models that can exploit the inherent structure in data have gained prominence.
no code implementations • 2 Oct 2018 • Uday Shankar Shanthamallu, Jayaraman J. Thiagarajan, Huan Song, Andreas Spanias
Though deep network embeddings, e. g. DeepWalk, are widely adopted for community discovery, we argue that feature learning with random node attributes, using graph neural networks, can be more effective.
1 code implementation • 5 Sep 2018 • Gowtham Muniraju, Bhavya Kailkhura, Jayaraman J. Thiagarajan, Peer-Timo Bremer, Cihan Tepedelenlioglu, Andreas Spanias
Sampling one or more effective solutions from large search spaces is a recurring idea in machine learning, and sequential optimization has become a popular solution.
no code implementations • 4 Aug 2018 • Huan Song, Megan Willi, Jayaraman J. Thiagarajan, Visar Berisha, Andreas Spanias
In automatic speech processing systems, speaker diarization is a crucial front-end component to separate segments from different speakers.
no code implementations • 15 Nov 2017 • Huan Song, Jayaraman J. Thiagarajan, Prasanna Sattigeri, Andreas Spanias
To this end, we develop the DKMO (Deep Kernel Machine Optimization) framework, that creates an ensemble of dense embeddings using Nystrom kernel approximations and utilizes deep learning to generate task-specific representations through the fusion of the embeddings.
no code implementations • 10 Nov 2017 • Huan Song, Deepta Rajan, Jayaraman J. Thiagarajan, Andreas Spanias
With widespread adoption of electronic health records, there is an increased emphasis for predictive models that can effectively deal with clinical time-series data.
no code implementations • 21 Feb 2017 • Alan Wisler, Visar Berisha, Andreas Spanias, Alfred O. Hero
Typically, estimating these quantities requires complete knowledge of the underlying distribution followed by multi-dimensional integration.
no code implementations • 28 Dec 2016 • Huan Song, Jayaraman J. Thiagarajan, Prasanna Sattigeri, Karthikeyan Natesan Ramamurthy, Andreas Spanias
Kernel fusion is a popular and effective approach for combining multiple features that characterize different aspects of data.
no code implementations • 19 Dec 2014 • Visar Berisha, Alan Wisler, Alfred O. Hero, Andreas Spanias
Information divergence functions play a critical role in statistics and information theory.
no code implementations • 12 Mar 2013 • Karthikeyan Natesan Ramamurthy, Jayaraman J. Thiagarajan, Andreas Spanias
For case (c), we propose the combined orthogonal matching pursuit algorithm for coefficient recovery and derive the deterministic sparsity threshold under which recovery of the unique, sparsest coefficient vector is possible.
no code implementations • 3 Mar 2013 • Jayaraman J. Thiagarajan, Karthikeyan Natesan Ramamurthy, Andreas Spanias
Algorithmic stability and generalization are desirable characteristics for dictionary learning algorithms that aim to build global dictionaries which can efficiently model any test data similar to the training samples.
no code implementations • 3 Mar 2013 • Jayaraman J. Thiagarajan, Karthikeyan Natesan Ramamurthy, Andreas Spanias
Descriptors that have diverse forms can be fused into a unified feature space in a principled manner using kernel methods.