Uddeshya Upadhyay

Tinkerer || Engineer || Scientist

I'm a computer scientist (and a self-proclaimed tinkerer), specializing in computer vision and machine learning. I’m designing methods and systems for data-driven solutions to real-world complex problems in healthcare, finance, etc.

Currently, my focus is on developing new methods and richer tools for various applications in healthcare (e.g., imaging, time-series, text, etc.) at Nference, where I’m a Staff Scientist. Notably, I work on making ML models reliable for critical applications using Bayesian deep learning and uncertainty quantification, and also use generative modeling to develop methods that enhance clinical workflows.

What now seems like aeons ago, I got my Ph.D. in CS (focusing on ML/CV) at International Max Planck Research School for Intelligent Systems (IMPRS-IS), Germany. Even earlier, I was an undergrad at Computer Sci. & Engg. @ Indian Institute of Technology (IIT)-Bombay.

Selected Publications (full list @ GoogleScholar)

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HypUC: Hyperfine Uncertainty Calibration with Gradient- boosted Corrections for Reliable Regression on Imbalanced Electrocardiograms

Uddeshya Upadhyay, Sairam Bade et.al., Transactions on Machine Learning Research (TMLR) - 2023

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ProbVLM: Probabilistic Adapter for Frozen Vision-Language Models

Uddeshya Upadhyay*, Shyamgopal Karthik*, et.al.,

International Conference on Computer Vision (ICCV) - 2023

[code]

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USIM-DAL: Uncertainty-aware Statistical Image Modeling-based Dense Active Learning for Super-resolution

Vikrant Rangnekar*, Uddeshya Upadhyay*, et.al.,

The Conference on Uncertainty in Artificial Intelligence (UAI) - 2023

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BayesCap: Bayesian Identity Cap for Calibrated Uncertainty in Frozen Neural Networks

Uddeshya Upadhyay*, Shyamgopal Karthik*, et.al.,

European Conference on Computer Vision (ECCV) - 2022

[code] [demo]

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Uncertainty-Guided Progressive GANs for Medical Image Translation

Uddeshya Upadhyay, Yanbei Chen, et.al.,

International Conference on Medical Image Computing and Computer Aided Diagnosis (MICCAI) - 2021

[code]

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Robustness via Uncertainty-aware Cycle Consistency

Uddeshya Upadhyay, Yanbei Chen, Zeynep Akata

Advances in Neural Information Processing Systems (NeurIPS) - 2021

[code]

Selected Projects (More @ Github)

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Neurapse is a package in python which implements some of the fundamental blocks of SNN and is written in a manner so that it can easily be extended and customized for simulation purposes. Spiking Neural Networks (SNNs) are called 3rd Gen and they attempt to simulate biological neural networks closely. Broadly the framework consists of SpikesNeuronsSynapsesNetworks

IBM launched TrueNorth chip in 2014, Intel announced Loihi in 2017 both are attempts to do neuromorphic computations efficiently on chip.

[code]

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BayesCap. This is the official PyTorch implementation of BayesCap (from ECCV 2022) that allows estimating calibrated uncertainty for pre-trained (frozen) computer vision regression models in fast and efficient manner.

[code]

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Uncertainty_Guided_Progressive-GAN. This repository provides the code for the MICCAI-2021 paper titled "Uncertainty-guided Progressive GANs for Medical Image Translation". We take inspiration from the progressive learning scheme demonstrated at MedGAN and Progressive GANs, and augment the learning with the estimation of intermediate uncertainty maps (as presented here and here), that are used as attention map to focus the image translation in poorly generated (highly uncertain) regions, progressively improving the images over multiple phases.

[code]

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Transformer Based Reinforcement Learning for Games.

This repository contains experimental models, written in PyTorch, which incorporate transformers in the Deep Q-Learning tasks, to see if they perform better than the RNN based version (DRQN) or simple DQN.

[code]

Musings