Search Results for author: Sanjay Purushotham

Found 19 papers, 6 papers with code

A Generative Approach for Image Registration of Visible-Thermal (VT) Cancer Faces

no code implementations23 Aug 2023 Catherine Ordun, Alexandra Cha, Edward Raff, Sanjay Purushotham, Karen Kwok, Mason Rule, James Gulley

Since thermal imagery offers a unique modality to investigate pain, the U. S. National Institutes of Health (NIH) has collected a large and diverse set of cancer patient facial thermograms for AI-based pain research.

Image Registration

Novel Categories Discovery Via Constraints on Empirical Prediction Statistics

1 code implementation7 Jul 2023 Zahid Hasan, Abu Zaher Md Faridee, Masud Ahmed, Sanjay Purushotham, Heesung Kwon, Hyungtae Lee, Nirmalya Roy

As an alternative to the traditional pseudo-labeling-based approaches, we leverage the connection between the data sampling and the provided multinoulli (categorical) distribution of novel classes.

Clustering Pseudo Label +2

When Visible-to-Thermal Facial GAN Beats Conditional Diffusion

no code implementations18 Feb 2023 Catherine Ordun, Edward Raff, Sanjay Purushotham

Thermal facial imagery offers valuable insight into physiological states such as inflammation and stress by detecting emitted radiation in the infrared spectrum, which is unseen in the visible spectra.

Denoising

Pseudo value-based Deep Neural Networks for Multi-state Survival Analysis

no code implementations12 Jul 2022 Md Mahmudur Rahman, Sanjay Purushotham

To address these limitations, we propose a new class of pseudo-value-based deep learning models for multi-state survival analysis, where we show that pseudo values - designed to handle censoring - can be a natural replacement for estimating the multi-state model quantities when derived from a consistent estimator.

Survival Analysis

FedPseudo: Pseudo value-based Deep Learning Models for Federated Survival Analysis

no code implementations12 Jul 2022 Md Mahmudur Rahman, Sanjay Purushotham

To overcome the challenges of existing federated survival analysis methods, we leverage the predictive accuracy of the deep learning models and the power of pseudo values to propose a first-of-its-kind, pseudo value-based deep learning model for federated survival analysis (FSA) called FedPseudo.

Federated Learning Survival Analysis

Generating Thermal Human Faces for Physiological Assessment Using Thermal Sensor Auxiliary Labels

1 code implementation15 Jun 2021 Catherine Ordun, Edward Raff, Sanjay Purushotham

These combined data are captured from similar sensors in order to bootstrap the training and transfer learning task, especially valuable because visible-thermal face datasets are limited.

SSIM Transfer Learning +1

The Use of AI for Thermal Emotion Recognition: A Review of Problems and Limitations in Standard Design and Data

no code implementations22 Sep 2020 Catherine Ordun, Edward Raff, Sanjay Purushotham

But we also propose that thermal imagery may provide a semi-anonymous modality for computer vision, over RGB, which has been plagued by misuse in facial recognition.

BIG-bench Machine Learning Facial Emotion Recognition

Exploratory Analysis of Covid-19 Tweets using Topic Modeling, UMAP, and DiGraphs

2 code implementations6 May 2020 Catherine Ordun, Sanjay Purushotham, Edward Raff

As the time to retweet increases, the density of connections also increase where in our sample, we found distinct users dominating the attention of Covid19 retweeters.

Clustering Descriptive

Neural Interaction Transparency (NIT): Disentangling Learned Interactions for Improved Interpretability

no code implementations NeurIPS 2018 Michael Tsang, Hanpeng Liu, Sanjay Purushotham, Pavankumar Murali, Yan Liu

Neural networks are known to model statistical interactions, but they entangle the interactions at intermediate hidden layers for shared representation learning.

Additive models Representation Learning

Hierarchical Deep Generative Models for Multi-Rate Multivariate Time Series

no code implementations ICML 2018 Zhengping Che, Sanjay Purushotham, Guangyu Li, Bo Jiang, Yan Liu

Multi-Rate Multivariate Time Series (MR-MTS) are the multivariate time series observations which come with various sampling rates and encode multiple temporal dependencies.

Time Series Time Series Analysis

Relational Multi-Instance Learning for Concept Annotation from Medical Time Series

no code implementations ICLR 2018 Sanjay Purushotham, Zhengping Che, Bo Jiang, Tanachat Nilanon, Yan Liu

Recent advances in computing technology and sensor design have made it easier to collect longitudinal or time series data from patients, resulting in a gigantic amount of available medical data.

Time Series Time Series Analysis

Benchmark of Deep Learning Models on Large Healthcare MIMIC Datasets

1 code implementation23 Oct 2017 Sanjay Purushotham, Chuizheng Meng, Zhengping Che, Yan Liu

Deep learning models (aka Deep Neural Networks) have revolutionized many fields including computer vision, natural language processing, speech recognition, and is being increasingly used in clinical healthcare applications.

Benchmarking BIG-bench Machine Learning +6

m-TSNE: A Framework for Visualizing High-Dimensional Multivariate Time Series

no code implementations26 Aug 2017 Minh Nguyen, Sanjay Purushotham, Hien To, Cyrus Shahabi

Multivariate time series (MTS) have become increasingly common in healthcare domains where human vital signs and laboratory results are collected for predictive diagnosis.

Time Series Time Series Analysis +1

Measuring and Predicting Tag Importance for Image Retrieval

no code implementations28 Feb 2016 Shang-Wen Li, Sanjay Purushotham, Chen Chen, Yuzhuo Ren, C. -C. Jay Kuo

Textual data such as tags, sentence descriptions are combined with visual cues to reduce the semantic gap for image retrieval applications in today's Multimodal Image Retrieval (MIR) systems.

Image Retrieval Retrieval +2

Distilling Knowledge from Deep Networks with Applications to Healthcare Domain

no code implementations11 Dec 2015 Zhengping Che, Sanjay Purushotham, Robinder Khemani, Yan Liu

Exponential growth in Electronic Healthcare Records (EHR) has resulted in new opportunities and urgent needs for discovery of meaningful data-driven representations and patterns of diseases in Computational Phenotyping research.

Computational Phenotyping Decision Making +4

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