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Prithvijit Chattopadhyay

11 accepted papers

2024

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

ICLR 2024poster

Synthetic data (Sim) drawn from simulators have emerged as a popular alternativefor training models where acquiring annotated real-world images is difficult. However, transferring models trained on synthetic images to real-world applicationscan be challenging due to appearance disparities. A commonl…

Cited by 0SourcePDFScholar
2024

SkyScenes: A Synthetic Dataset for Aerial Scene Understanding

ECCV 2024poster

"Real-world aerial scene understanding is limited by a lack of datasets that contain densely annotated images curated under a diverse set of conditions. Due to inherent challenges in obtaining such images in controlled real-world settings, we present , a synthetic dataset of densely annotated aerial…

2023

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

NeurIPS 2023poster

Neural network based computer vision systems are typically built on a backbone, a pretrained or randomly initialized feature extractor. Several years ago, the default option was an ImageNet-trained convolutional neural network. However, the recent past has seen the emergence of countless backbones…

2023

Benchmarking Low-Shot Robustness to Natural Distribution Shifts

ICCV 2023poster

Robustness to natural distribution shifts has seen remarkable progress thanks to recent pre-training strategies combined with better fine-tuning methods. However, such fine-tuning assumes access to large amounts of labelled data, and the extent to which the observations hold when the amount of train…

Cited by 3PDFcodeScholar
2023

LANCE: Stress-testing Visual Models by Generating Language-guided Counterfactual Images

NeurIPS 2023poster

We propose an automated algorithm to stress-test a trained visual model by generating language-guided counterfactual test images (LANCE). Our method leverages recent progress in large language modeling and text-based image editing to augment an IID test set with a suite of diverse, realistic, and ch…

2023

PASTA: Proportional Amplitude Spectrum Training Augmentation for Syn-to-Real Domain Generalization

ICCV 2023poster

Synthetic data offers the promise of cheap and bountiful training data for settings where labeled real-world data is scarce. However, models trained on synthetic data significantly underperform when evaluated on real-world data. In this paper, we propose Proportional Amplitude Spectrum Training Augm…

Cited by 30PDFcodeScholar
2021

RobustNav: Towards Benchmarking Robustness in Embodied Navigation

ICCV 2021poster

As an attempt towards assessing the robustness of embodied navigation agents, we propose RobustNav, a framework to quantify the performance of embodied navigation agents when exposed to a wide variety of visual-- affecting RGB inputs -- and dynamics -- affecting transition dynamics -- corruptions. M…

Cited by 60PDFcodeScholar
2020

IR-VIC: Unsupervised Discovery of Sub-goals for Transfer in RL

IJCAI 2020poster

We propose a novel framework to identify sub-goals useful for exploration in sequential decision making tasks under partial observability. We utilize the variational intrinsic control framework (Gregor et.al., 2016) which maximizes empowerment -- the ability to reliably reach a diverse set of states…

2020

Learning to Balance Specificity and Invariance for In and Out of Domain Generalization

ECCV 2020poster

We introduce Domain-specific Masks for Generalization, a model for improving both in-domain and out-of-domain generalization performance. For domain generalization, the goal is to learn from a set of source domains to produce a single model that will best generalize to an unseen target domain. As su…

2018

Choose Your Neuron: Incorporating Domain Knowledge through Neuron-Importance

ECCV 2018poster

Individual neurons in convolutional neural networks supervised for image-level classification tasks have been shown to implicitly learn semantically meaningful concepts ranging from simple textures and shapes to whole or partial objects – forming a “dictionary” of concepts acquired through the learn…

2017

Counting Everyday Objects in Everyday Scenes

CVPR 2017spotlight

We are interested in counting the number of instances of object classes in natural, everyday images. Previous counting approaches tackle the problem in restricted domains such as counting pedestrians in surveillance videos. Counts can also be estimated from outputs of other vision tasks like object…

Cited by 205PDFcodeScholar