1 code implementation • ICLR 2019 • Julio Cesar Zamora, Jesus Adan Cruz Vargas, Omesh Tickoo
The quest for increased visual recognition performance has led to the development of highly complex neural networks with very deep topologies.
no code implementations • 21 Dec 2024 • Amanda S. Rios, Ibrahima J. Ndiour, Parual Datta, Jaroslaw Sydir, Omesh Tickoo, Nilesh Ahuja
We rigorously apply and evaluate COUQ on key sub-tasks in the Continual Open-World: continual novelty detection, uncertainty guided active learning, and uncertainty guided pseudo-labeling for semi-supervised CL.
no code implementations • 13 Dec 2024 • Amanda Rios, Ibrahima Ndiour, Parual Datta, Omesh Tickoo, Nilesh Ahuja
In the field of continual learning, relying on so-called oracles for novelty detection is commonplace albeit unrealistic.
no code implementations • 12 Dec 2024 • Amanda Rios, Ibrahima Ndiour, Parual Datta, Jerry Sydir, Omesh Tickoo, Nilesh Ahuja
Here, we consider a challenging, under-explored and realistic continual adaptation problem: a deployed AI agent is continuously provided with unlabeled data that may contain not only unseen samples of known classes but also samples from novel (unknown) classes.
no code implementations • 3 Dec 2024 • Ranganath Krishnan, Piyush Khanna, Omesh Tickoo
Through rigorous evaluation on multiple free-form question-answering datasets and models, we demonstrate that our uncertainty-aware fine-tuning approach yields better calibrated uncertainty estimates in natural language generation tasks than fine-tuning with the standard causal language modeling loss.
no code implementations • 26 May 2023 • Alon Harell, Yalda Foroutan, Nilesh Ahuja, Parual Datta, Bhavya Kanzariya, V. Srinivasa Somayaulu, Omesh Tickoo, Anderson de Andrade, Ivan V. Bajic
To meet this growing demand, several methods have been developed for image and video coding for machines.
1 code implementation • CVPR 2023 • Nilesh Ahuja, Parual Datta, Bhavya Kanzariya, V. Srinivasa Somayazulu, Omesh Tickoo
Optimizing the pipeline for both compression and task-performance requires high-quality estimates of the information-theoretic rate of the intermediate features.
no code implementations • 9 Dec 2022 • Neslihan Kose, Ranganath Krishnan, Akash Dhamasia, Omesh Tickoo, Michael Paulitsch
Reliable uncertainty quantification in deep neural networks is very crucial in safety-critical applications such as automated driving for trustworthy and informed decision-making.
no code implementations • 23 Nov 2022 • Ibrahima Ndiour, Nilesh Ahuja, Utku Genc, Omesh Tickoo
This paper presents a fast and principled approach for solving the visual anomaly detection and segmentation problem.
no code implementations • 24 Aug 2022 • Parual Datta, Nilesh Ahuja, V. Srinivasa Somayazulu, Omesh Tickoo
Split computing has emerged as a recent paradigm for implementation of DNN-based AI workloads, wherein a DNN model is split into two parts, one of which is executed on a mobile/client device and the other on an edge-server (or cloud).
no code implementations • 20 Mar 2022 • Ibrahima J. Ndiour, Nilesh A. Ahuja, Omesh Tickoo
This paper presents a fast, principled approach for detecting anomalous and out-of-distribution (OOD) samples in deep neural networks (DNN).
no code implementations • 13 Sep 2021 • Ranganath Krishnan, Nilesh Ahuja, Alok Sinha, Mahesh Subedar, Omesh Tickoo, Ravi Iyer
We introduce supervised contrastive active learning (SCAL) and propose efficient query strategies in active learning based on the feature similarity (featuresim) and principal component analysis based feature-reconstruction error (fre) to select informative data samples with diverse feature representations.
no code implementations • 13 Sep 2021 • Ranganath Krishnan, Alok Sinha, Nilesh Ahuja, Mahesh Subedar, Omesh Tickoo, Ravi Iyer
This paper presents simple and efficient methods to mitigate sampling bias in active learning while achieving state-of-the-art accuracy and model robustness.
no code implementations • 10 Sep 2021 • Shashank Bujimalla, Mahesh Subedar, Omesh Tickoo
PS-NOC is agnostic to model architecture, and primarily focuses on the training approach that uses existing fully paired image-caption data and the images with only the novel object detection labels (partially paired data).
no code implementations • 10 Jun 2021 • Shashank Bujimalla, Mahesh Subedar, Omesh Tickoo
In this paper, we study the impact of motion blur, a common quality flaw in real world images, on a state-of-the-art two-stage image captioning solution, and notice a degradation in solution performance as blur intensity increases.
no code implementations • ICLR Workshop EBM 2021 • Ergin Utku Genc, Nilesh Ahuja, Ibrahima J Ndiour, Omesh Tickoo
This brief sketches initial progress towards a unified energy-based solution for the semi-supervised visual anomaly detection and localization problem.
1 code implementation • NeurIPS 2020 • Ranganath Krishnan, Omesh Tickoo
Obtaining reliable and accurate quantification of uncertainty estimates from deep neural networks is important in safety-critical applications.
no code implementations • 8 Dec 2020 • Ibrahima Ndiour, Nilesh Ahuja, Omesh Tickoo
We also show that the feature reconstruction error, which is the $L_2$-norm of the difference between the original feature and the pre-image of its embedding, is highly effective for OOD detection and in some cases superior to the log-likelihood scores.
no code implementations • 15 Nov 2020 • Umang Bhatt, Javier Antorán, Yunfeng Zhang, Q. Vera Liao, Prasanna Sattigeri, Riccardo Fogliato, Gabrielle Gauthier Melançon, Ranganath Krishnan, Jason Stanley, Omesh Tickoo, Lama Nachman, Rumi Chunara, Madhulika Srikumar, Adrian Weller, Alice Xiang
Explainability attempts to provide reasons for a machine learning model's behavior to stakeholders.
no code implementations • 6 Apr 2020 • Shashank Bujimalla, Mahesh Subedar, Omesh Tickoo
The "baseline" for the policy-gradients in B-SCST is generated by averaging predictive quality metrics (CIDEr-D) of the captions drawn from the distribution obtained using a Bayesian DNN model.
no code implementations • 18 Dec 2019 • Javier Felip, Nilesh Ahuja, Omesh Tickoo
After each new sample operation, a set of tree leaves are subdivided for improving the approximation of the proposal distribution to the target density.
no code implementations • 3 Dec 2019 • Mahesh Subedar, Nilesh Ahuja, Ranganath Krishnan, Ibrahima J. Ndiour, Omesh Tickoo
In the second approach, we use Bayesian deep neural networks trained with mean-field variational inference to estimate model uncertainty associated with the predictions.
no code implementations • 25 Sep 2019 • Nilesh A. Ahuja, Ibrahima Ndiour, Trushant Kalyanpur, Omesh Tickoo
We present a principled approach for detecting out-of-distribution (OOD) and adversarial samples in deep neural networks.
2 code implementations • 12 Jun 2019 • Ranganath Krishnan, Mahesh Subedar, Omesh Tickoo
We propose MOdel Priors with Empirical Bayes using DNN (MOPED) method to choose informed weight priors in Bayesian neural networks.
no code implementations • 22 May 2019 • Javier Felip, Nilesh Ahuja, David Gómez-Gutiérrez, Omesh Tickoo, Vikash Mansinghka
The underlying generative models are built from realistic simulation software, wrapped in a Bayesian error model for the gap between simulation outputs and real data.
no code implementations • 27 Nov 2018 • Mahesh Subedar, Ranganath Krishnan, Paulo Lopez Meyer, Omesh Tickoo, Jonathan Huang
In the multimodal setting, the proposed framework improved precision-recall AUC by 10. 2% on the subset of MiT dataset as compared to non-Bayesian baseline.
no code implementations • 8 Nov 2018 • Ranganath Krishnan, Mahesh Subedar, Omesh Tickoo
We show that the Bayesian inference applied to DNNs provide reliable confidence measures for visual activity recognition task as compared to conventional DNNs.
no code implementations • 30 Aug 2017 • Srenivas Varadarajan, Parual Datta, Omesh Tickoo
We propose a greedy part assignment algorithm that exploits the inherent structure of the human body to achieve a lower complexity, compared to any of the prior published works.