Search Results for author: Jae Yong Lee

Found 16 papers, 4 papers with code

MonoPatchNeRF: Improving Neural Radiance Fields with Patch-based Monocular Guidance

no code implementations12 Apr 2024 Yuqun Wu, Jae Yong Lee, Chuhang Zou, Shenlong Wang, Derek Hoiem

Our experiments show 4x the performance of RegNeRF and 8x that of FreeNeRF on average F1@2cm for ETH3D MVS benchmark, suggesting a fruitful research direction to improve the geometric accuracy of NeRF-based models, and sheds light on a potential future approach to enable NeRF-based optimization to eventually outperform traditional MVS.

Novel View Synthesis SSIM

Learning time-dependent PDE via graph neural networks and deep operator network for robust accuracy on irregular grids

no code implementations13 Feb 2024 Sung Woong Cho, Jae Yong Lee, Hyung Ju Hwang

There has been growing interest in models that learn the operator from the parameters of a partial differential equation (PDE) to the corresponding solutions.

Operator learning

HyperDeepONet: learning operator with complex target function space using the limited resources via hypernetwork

no code implementations26 Dec 2023 Jae Yong Lee, Sung Woong Cho, Hyung Ju Hwang

This study proposes HyperDeepONet, which uses the expressive power of the hypernetwork to enable the learning of a complex operator with a smaller set of parameters.

Operator learning

Finite Element Operator Network for Solving Parametric PDEs

no code implementations9 Aug 2023 Jae Yong Lee, Seungchan Ko, Youngjoon Hong

Partial differential equations (PDEs) underlie our understanding and prediction of natural phenomena across numerous fields, including physics, engineering, and finance.

QFF: Quantized Fourier Features for Neural Field Representations

no code implementations2 Dec 2022 Jae Yong Lee, Yuqun Wu, Chuhang Zou, Shenlong Wang, Derek Hoiem

Instead, we propose to encode features in bins of Fourier features that are commonly used for positional encoding.

Sparse SPN: Depth Completion from Sparse Keypoints

no code implementations2 Dec 2022 Yuqun Wu, Jae Yong Lee, Derek Hoiem

Our long term goal is to use image-based depth completion to quickly create 3D models from sparse point clouds, e. g. from SfM or SLAM.

Depth Completion

Deep PatchMatch MVS with Learned Patch Coplanarity, Geometric Consistency and Adaptive Pixel Sampling

no code implementations14 Oct 2022 Jae Yong Lee, Chuhang Zou, Derek Hoiem

Recent work in multi-view stereo (MVS) combines learnable photometric scores and regularization with PatchMatch-based optimization to achieve robust pixelwise estimates of depth, normals, and visibility.

opPINN: Physics-Informed Neural Network with operator learning to approximate solutions to the Fokker-Planck-Landau equation

no code implementations5 Jul 2022 Jae Yong Lee, Juhi Jang, Hyung Ju Hwang

We propose a hybrid framework opPINN: physics-informed neural network (PINN) with operator learning for approximating the solution to the Fokker-Planck-Landau (FPL) equation.

Operator learning

Pseudo-Differential Neural Operator: Generalized Fourier Neural Operator for Learning Solution Operators of Partial Differential Equations

1 code implementation28 Jan 2022 Jin Young Shin, Jae Yong Lee, Hyung Ju Hwang

We combine the PDIO with the neural operator to develop a \textit{pseudo-differential neural operator} (PDNO) and learn the nonlinear solution operator of PDEs.

Solving PDE-constrained Control Problems Using Operator Learning

no code implementations9 Nov 2021 Rakhoon Hwang, Jae Yong Lee, Jin Young Shin, Hyung Ju Hwang

Once the surrogate model is trained in Phase 1, the optimal control can be inferred in Phase 2 without intensive computations.

Operator learning

PatchMatch-RL: Deep MVS with Pixelwise Depth, Normal, and Visibility

1 code implementation ICCV 2021 Jae Yong Lee, Joseph DeGol, Chuhang Zou, Derek Hoiem

To overcome the challenge of the non-differentiable PatchMatch optimization that involves iterative sampling and hard decisions, we use reinforcement learning to minimize expected photometric cost and maximize likelihood of ground truth depth and normals.

PatchMatch-Based Neighborhood Consensus for Semantic Correspondence

1 code implementation CVPR 2021 Jae Yong Lee, Joseph DeGol, Victor Fragoso, Sudipta N. Sinha

We address estimating dense correspondences between two images depicting different but semantically related scenes.

Semantic correspondence

The model reduction of the Vlasov-Poisson-Fokker-Planck system to the Poisson-Nernst-Planck system via the Deep Neural Network Approach

no code implementations28 Sep 2020 Jae Yong Lee, Jin Woo Jang, Hyung Ju Hwang

The model reduction of a mesoscopic kinetic dynamics to a macroscopic continuum dynamics has been one of the fundamental questions in mathematical physics since Hilbert's time.

Trend to Equilibrium for the Kinetic Fokker-Planck Equation via the Neural Network Approach

no code implementations22 Nov 2019 Hyung Ju Hwang, Jin Woo Jang, Hyeontae Jo, Jae Yong Lee

The issue of the relaxation to equilibrium has been at the core of the kinetic theory of rarefied gas dynamics.

Friction

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