Search Results for author: Viraj Prabhu

Found 21 papers, 9 papers with code

We're Not Using Videos Effectively: An Updated Domain Adaptive Video Segmentation Baseline

1 code implementation1 Feb 2024 Simar Kareer, Vivek Vijaykumar, Harsh Maheshwari, Prithvijit Chattopadhyay, Judy Hoffman, Viraj Prabhu

While the vast majority of prior work has studied this as a frame-level Image-DAS problem, a few Video-DAS works have sought to additionally leverage the temporal signal present in adjacent frames.

Benchmarking Semantic Segmentation +3

AUGCAL: Improving Sim2Real Adaptation by Uncertainty Calibration on Augmented Synthetic Images

no code implementations11 Dec 2023 Prithvijit Chattopadhyay, Bharat Goyal, Boglarka Ecsedi, Viraj Prabhu, Judy Hoffman

Synthetic data (SIM) drawn from simulators have emerged as a popular alternative for training models where acquiring annotated real-world images is difficult.

Unsupervised Domain Adaptation

Battle of the Backbones: A Large-Scale Comparison of Pretrained Models across Computer Vision Tasks

2 code implementations NeurIPS 2023 Micah Goldblum, Hossein Souri, Renkun Ni, Manli Shu, Viraj Prabhu, Gowthami Somepalli, Prithvijit Chattopadhyay, Mark Ibrahim, Adrien Bardes, Judy Hoffman, Rama Chellappa, Andrew Gordon Wilson, Tom Goldstein

Battle of the Backbones (BoB) makes this choice easier by benchmarking a diverse suite of pretrained models, including vision-language models, those trained via self-supervised learning, and the Stable Diffusion backbone, across a diverse set of computer vision tasks ranging from classification to object detection to OOD generalization and more.

Benchmarking object-detection +2

FACTS: First Amplify Correlations and Then Slice to Discover Bias

1 code implementation ICCV 2023 Sriram Yenamandra, Pratik Ramesh, Viraj Prabhu, Judy Hoffman

Computer vision datasets frequently contain spurious correlations between task-relevant labels and (easy to learn) latent task-irrelevant attributes (e. g. context).

ICON$^2$: Reliably Benchmarking Predictive Inequity in Object Detection

no code implementations7 Jun 2023 Sruthi Sudhakar, Viraj Prabhu, Olga Russakovsky, Judy Hoffman

As computer vision systems are being increasingly deployed at scale in high-stakes applications like autonomous driving, concerns about social bias in these systems are rising.

Attribute Autonomous Driving +5

Bridging the Sim2Real gap with CARE: Supervised Detection Adaptation with Conditional Alignment and Reweighting

no code implementations9 Feb 2023 Viraj Prabhu, David Acuna, Andrew Liao, Rafid Mahmood, Marc T. Law, Judy Hoffman, Sanja Fidler, James Lucas

Sim2Real domain adaptation (DA) research focuses on the constrained setting of adapting from a labeled synthetic source domain to an unlabeled or sparsely labeled real target domain.

Autonomous Driving Domain Adaptation +3

Mitigating Bias in Visual Transformers via Targeted Alignment

no code implementations8 Feb 2023 Sruthi Sudhakar, Viraj Prabhu, Arvindkumar Krishnakumar, Judy Hoffman

We visualize the feature space of the transformer self-attention modules and discover that a significant portion of the bias is encoded in the query matrix.

Attribute Fairness

Adapting Self-Supervised Vision Transformers by Probing Attention-Conditioned Masking Consistency

1 code implementation16 Jun 2022 Viraj Prabhu, Sriram Yenamandra, Aaditya Singh, Judy Hoffman

Inspired by the design of recent SSL approaches based on learning from partial image inputs generated via masking or cropping -- either by learning to predict the missing pixels, or learning representational invariances to such augmentations -- we propose PACMAC, a simple two-stage adaptation algorithm for self-supervised ViTs.

Domain Adaptation Object Recognition +1

Can domain adaptation make object recognition work for everyone?

no code implementations23 Apr 2022 Viraj Prabhu, Ramprasaath R. Selvaraju, Judy Hoffman, Nikhil Naik

Despite the rapid progress in deep visual recognition, modern computer vision datasets significantly overrepresent the developed world and models trained on such datasets underperform on images from unseen geographies.

Object Object Recognition +1

UDIS: Unsupervised Discovery of Bias in Deep Visual Recognition Models

1 code implementation29 Oct 2021 Arvindkumar Krishnakumar, Viraj Prabhu, Sruthi Sudhakar, Judy Hoffman

Deep learning models have been shown to learn spurious correlations from data that sometimes lead to systematic failures for certain subpopulations.

Clustering Image Classification

AUGCO: Augmentation Consistency-guided Self-training for Source-free Domain Adaptive Semantic Segmentation

no code implementations21 Jul 2021 Viraj Prabhu, Shivam Khare, Deeksha Kartik, Judy Hoffman

Most modern approaches for domain adaptive semantic segmentation rely on continued access to source data during adaptation, which may be infeasible due to computational or privacy constraints.

Segmentation Semantic Segmentation +1

SENTRY: Selective Entropy Optimization via Committee Consistency for Unsupervised Domain Adaptation

2 code implementations ICCV 2021 Viraj Prabhu, Shivam Khare, Deeksha Kartik, Judy Hoffman

Many existing approaches for unsupervised domain adaptation (UDA) focus on adapting under only data distribution shift and offer limited success under additional cross-domain label distribution shift.

Pseudo Label Unsupervised Domain Adaptation

Open Set Medical Diagnosis

no code implementations7 Oct 2019 Viraj Prabhu, Anitha Kannan, Geoffrey J. Tso, Namit Katariya, Manish Chablani, David Sontag, Xavier Amatriain

Machine-learned diagnosis models have shown promise as medical aides but are trained under a closed-set assumption, i. e. that models will only encounter conditions on which they have been trained.

Medical Diagnosis Open Set Learning

Do Explanations make VQA Models more Predictable to a Human?

no code implementations EMNLP 2018 Arjun Chandrasekaran, Viraj Prabhu, Deshraj Yadav, Prithvijit Chattopadhyay, Devi Parikh

A rich line of research attempts to make deep neural networks more transparent by generating human-interpretable 'explanations' of their decision process, especially for interactive tasks like Visual Question Answering (VQA).

Question Answering Visual Question Answering

Fabrik: An Online Collaborative Neural Network Editor

no code implementations27 Oct 2018 Utsav Garg, Viraj Prabhu, Deshraj Yadav, Ram Ramrakhya, Harsh Agrawal, Dhruv Batra

We present Fabrik, an online neural network editor that provides tools to visualize, edit, and share neural networks from within a browser.

The Promise of Premise: Harnessing Question Premises in Visual Question Answering

1 code implementation EMNLP 2017 Aroma Mahendru, Viraj Prabhu, Akrit Mohapatra, Dhruv Batra, Stefan Lee

In this paper, we make a simple observation that questions about images often contain premises - objects and relationships implied by the question - and that reasoning about premises can help Visual Question Answering (VQA) models respond more intelligently to irrelevant or previously unseen questions.

Question Answering Visual Question Answering

It Takes Two to Tango: Towards Theory of AI's Mind

no code implementations3 Apr 2017 Arjun Chandrasekaran, Deshraj Yadav, Prithvijit Chattopadhyay, Viraj Prabhu, Devi Parikh

Surprisingly, we find that having access to the model's internal states - its confidence in its top-k predictions, explicit or implicit attention maps which highlight regions in the image (and words in the question) the model is looking at (and listening to) while answering a question about an image - do not help people better predict its behavior.

Attribute Question Answering +2

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