Search Results for author: Ranganath Krishnan

Found 12 papers, 2 papers with code

Enhancing Trust in Large Language Models with Uncertainty-Aware Fine-Tuning

no code implementations3 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.

HEAL: Brain-inspired Hyperdimensional Efficient Active Learning

no code implementations17 Feb 2024 Yang Ni, Zhuowen Zou, Wenjun Huang, Hanning Chen, William Youngwoo Chung, Samuel Cho, Ranganath Krishnan, Pietro Mercati, Mohsen Imani

Drawing inspiration from the outstanding learning capability of our human brains, Hyperdimensional Computing (HDC) emerges as a novel computing paradigm, and it leverages high-dimensional vector presentation and operations for brain-like lightweight Machine Learning (ML).

Active Learning Diversity

Reliable Multimodal Trajectory Prediction via Error Aligned Uncertainty Optimization

no code implementations9 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.

Decision Making motion prediction +3

Robust Contrastive Active Learning with Feature-guided Query Strategies

no code implementations13 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.

Active Learning Image Classification +1

Mitigating Sampling Bias and Improving Robustness in Active Learning

no code implementations13 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.

Active Learning

Improving model calibration with accuracy versus uncertainty optimization

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.

Image Classification Variational Inference

Deep Probabilistic Models to Detect Data Poisoning Attacks

no code implementations3 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.

Data Poisoning Variational Inference

Specifying Weight Priors in Bayesian Deep Neural Networks with Empirical Bayes

2 code implementations12 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.

Activity Recognition Audio Classification +5

Uncertainty aware audiovisual activity recognition using deep Bayesian variational inference

no code implementations27 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.

Bayesian Inference Multimodal Activity Recognition +1

BAR: Bayesian Activity Recognition using variational inference

no code implementations8 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.

Activity Recognition Bayesian Inference +1

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