Search Results for author: Ramya Korlakai Vinayak

Found 12 papers, 6 papers with code

Taming False Positives in Out-of-Distribution Detection with Human Feedback

1 code implementation25 Apr 2024 Harit Vishwakarma, Heguang Lin, Ramya Korlakai Vinayak

Empirical evaluation of our system on synthetic and benchmark OOD datasets shows that our method can maintain FPR at most $5\%$ while maximizing TPR.

Medical Diagnosis Out-of-Distribution Detection +1

Pearls from Pebbles: Improved Confidence Functions for Auto-labeling

no code implementations24 Apr 2024 Harit Vishwakarma, Reid, Chen, Sui Jiet Tay, Satya Sai Srinath Namburi, Frederic Sala, Ramya Korlakai Vinayak

We develop a tractable version of the framework to obtain \texttt{Colander} (Confidence functions for Efficient and Reliable Auto-labeling), a new post-hoc method specifically designed to maximize performance in TBAL systems.

Metric Learning from Limited Pairwise Preference Comparisons

1 code implementation28 Mar 2024 Zhi Wang, Geelon So, Ramya Korlakai Vinayak

We study whether the metric can still be recovered, even though it is known that learning individual ideal items is now no longer possible.

Metric Learning

Limitations of Face Image Generation

1 code implementation13 Sep 2023 Harrison Rosenberg, Shimaa Ahmed, Guruprasad V Ramesh, Ramya Korlakai Vinayak, Kassem Fawaz

In particular, their ability to synthesize and modify human faces has spurred research into using generated face images in both training data augmentation and model performance assessments.

Data Augmentation Face Generation

Promises and Pitfalls of Threshold-based Auto-labeling

2 code implementations NeurIPS 2023 Harit Vishwakarma, Heguang Lin, Frederic Sala, Ramya Korlakai Vinayak

Given the long shelf-life and diverse usage of the resulting datasets, understanding when the data obtained by such auto-labeling systems can be relied on is crucial.

Fisher-Pitman permutation tests based on nonparametric Poisson mixtures with application to single cell genomics

no code implementations6 Jun 2021 Zhen Miao, Weihao Kong, Ramya Korlakai Vinayak, Wei Sun, Fang Han

This paper investigates the theoretical and empirical performance of Fisher-Pitman-type permutation tests for assessing the equality of unknown Poisson mixture distributions.

Estimating the number and effect sizes of non-null hypotheses

1 code implementation ICML 2020 Jennifer Brennan, Ramya Korlakai Vinayak, Kevin Jamieson

We study the problem of estimating the distribution of effect sizes (the mean of the test statistic under the alternate hypothesis) in a multiple testing setting.

Experimental Design

Optimal Estimation of Change in a Population of Parameters

no code implementations28 Nov 2019 Ramya Korlakai Vinayak, Weihao Kong, Sham M. Kakade

Provided these paired observations, $\{(X_i, Y_i) \}_{i=1}^N$, our goal is to accurately estimate the \emph{distribution of the change in parameters}, $\delta_i := q_i - p_i$, over the population and properties of interest like the \emph{$\ell_1$-magnitude of the change} with sparse observations ($t\ll N$).

Epidemiology

Maximum Likelihood Estimation for Learning Populations of Parameters

no code implementations12 Feb 2019 Ramya Korlakai Vinayak, Weihao Kong, Gregory Valiant, Sham M. Kakade

Precisely, for sufficiently large $N$, the MLE achieves the information theoretic optimal error bound of $\mathcal{O}(\frac{1}{t})$ for $t < c\log{N}$, with regards to the earth mover's distance (between the estimated and true distributions).

Crowdsourced Clustering: Querying Edges vs Triangles

no code implementations NeurIPS 2016 Ramya Korlakai Vinayak, Babak Hassibi

When a generative model for the data is available (and we consider a few of these) we determine the cost of a query by its entropy; when such models do not exist we use the average response time per query of the workers as a surrogate for the cost.

Clustering

Cannot find the paper you are looking for? You can Submit a new open access paper.