Search Results for author: Jingbo Liu

Found 11 papers, 1 papers with code

Minimax Optimality of Score-based Diffusion Models: Beyond the Density Lower Bound Assumptions

no code implementations23 Feb 2024 Kaihong Zhang, Heqi Yin, Feng Liang, Jingbo Liu

As a consequence, this yields an $\widetilde{O}\left(n^{-1/2} t^{-\frac{d}{4}}\right)$ upper bound for the total variation error of the distribution of the sample generated by the diffusion model under a mere sub-Gaussian assumption.

$L^1$ Estimation: On the Optimality of Linear Estimators

no code implementations17 Sep 2023 Leighton P. Barnes, Alex Dytso, Jingbo Liu, H. Vincent Poor

Consider the problem of estimating a random variable $X$ from noisy observations $Y = X+ Z$, where $Z$ is standard normal, under the $L^1$ fidelity criterion.

NeILF++: Inter-Reflectable Light Fields for Geometry and Material Estimation

no code implementations ICCV 2023 Jingyang Zhang, Yao Yao, Shiwei Li, Jingbo Liu, Tian Fang, David McKinnon, Yanghai Tsin, Long Quan

We present a novel differentiable rendering framework for joint geometry, material, and lighting estimation from multi-view images.

Lighting Estimation

NeILF: Neural Incident Light Field for Physically-based Material Estimation

1 code implementation14 Mar 2022 Yao Yao, Jingyang Zhang, Jingbo Liu, Yihang Qu, Tian Fang, David McKinnon, Yanghai Tsin, Long Quan

We present a differentiable rendering framework for material and lighting estimation from multi-view images and a reconstructed geometry.

Lighting Estimation

On the Value of Interaction and Function Approximation in Imitation Learning

no code implementations NeurIPS 2021 Nived Rajaraman, Yanjun Han, Lin Yang, Jingbo Liu, Jiantao Jiao, Kannan Ramchandran

In contrast, when the MDP transition structure is known to the learner such as in the case of simulators, we demonstrate fundamental differences compared to the tabular setting in terms of the performance of an optimal algorithm, Mimic-MD (Rajaraman et al. (2020)) when extended to the function approximation setting.

Imitation Learning Multi-class Classification

Efficient Interpolation of Density Estimators

no code implementations10 Nov 2020 Paxton Turner, Jingbo Liu, Philippe Rigollet

We study the problem of space and time efficient evaluation of a nonparametric estimator that approximates an unknown density.

A Statistical Perspective on Coreset Density Estimation

no code implementations10 Nov 2020 Paxton Turner, Jingbo Liu, Philippe Rigollet

Coresets have emerged as a powerful tool to summarize data by selecting a small subset of the original observations while retaining most of its information.

Density Estimation

Power analysis of knockoff filters for correlated designs

no code implementations NeurIPS 2019 Jingbo Liu, Philippe Rigollet

We introduce a simple functional called effective signal deficiency (ESD) of the covariance matrix $\Sigma$ that predicts consistency of various variable selection methods.

Variable Selection

Accuracy-Memory Tradeoffs and Phase Transitions in Belief Propagation

no code implementations24 May 2019 Vishesh Jain, Frederic Koehler, Jingbo Liu, Elchanan Mossel

The analysis of Belief Propagation and other algorithms for the {\em reconstruction problem} plays a key role in the analysis of community detection in inference on graphs, phylogenetic reconstruction in bioinformatics, and the cavity method in statistical physics.

Community Detection

Communication Complexity of Estimating Correlations

no code implementations25 Jan 2019 Uri Hadar, Jingbo Liu, Yury Polyanskiy, Ofer Shayevitz

Our results also imply an $\Omega(n)$ lower bound on the information complexity of the Gap-Hamming problem, for which we show a direct information-theoretic proof.

Higher-Order CRF Structural Segmentation of 3D Reconstructed Surfaces

no code implementations ICCV 2015 Jingbo Liu, Jinglu Wang, Tian Fang, Chiew-Lan Tai, Long Quan

In this paper, we propose a structural segmentation algorithm to partition multi-view stereo reconstructed surfaces of large-scale urban environments into structural segments.

Segmentation

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