Search Results for author: Sabyasachi Chatterjee

Found 5 papers, 0 papers with code

A Cross Validation Framework for Signal Denoising with Applications to Trend Filtering, Dyadic CART and Beyond

no code implementations7 Jan 2022 Anamitra Chaudhuri, Sabyasachi Chatterjee

The general framework is then applied to nonparametric regression methods such as Trend Filtering and Dyadic CART.

Denoising

Adaptive Estimation of Multivariate Piecewise Polynomials and Bounded Variation Functions by Optimal Decision Trees

no code implementations26 Nov 2019 Sabyasachi Chatterjee, Subhajit Goswami

We prove oracle inequalities for the finite sample risk of Dyadic CART and ORT which imply tight risk bounds for several function classes of interest.

Denoising

New Risk Bounds for 2D Total Variation Denoising

no code implementations4 Feb 2019 Sabyasachi Chatterjee, Subhajit Goswami

2D Total Variation Denoising (TVD) is a widely used technique for image denoising.

Image Denoising

Local Minimax Complexity of Stochastic Convex Optimization

no code implementations NeurIPS 2016 Yuancheng Zhu, Sabyasachi Chatterjee, John Duchi, John Lafferty

The bounds are expressed in terms of a localized and computational analogue of the modulus of continuity that is central to statistical minimax analysis.

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