Search Results for author: Kaiwen Zheng

Found 9 papers, 6 papers with code

Schrodinger Bridges Beat Diffusion Models on Text-to-Speech Synthesis

no code implementations6 Dec 2023 Zehua Chen, Guande He, Kaiwen Zheng, Xu Tan, Jun Zhu

Specifically, we leverage the latent representation obtained from text input as our prior, and build a fully tractable Schrodinger bridge between it and the ground-truth mel-spectrogram, leading to a data-to-data process.

Speech Synthesis Text-To-Speech Synthesis

InstructPix2NeRF: Instructed 3D Portrait Editing from a Single Image

1 code implementation6 Nov 2023 Jianhui Li, Shilong Liu, Zidong Liu, Yikai Wang, Kaiwen Zheng, Jinghui Xu, Jianmin Li, Jun Zhu

With the success of Neural Radiance Field (NeRF) in 3D-aware portrait editing, a variety of works have achieved promising results regarding both quality and 3D consistency.

DPM-Solver-v3: Improved Diffusion ODE Solver with Empirical Model Statistics

1 code implementation NeurIPS 2023 Kaiwen Zheng, Cheng Lu, Jianfei Chen, Jun Zhu

In this work, we propose a novel formulation towards the optimal parameterization during sampling that minimizes the first-order discretization error of the ODE solution.

Image Generation

High-quality Image Dehazing with Diffusion Model

1 code implementation23 Aug 2023 Hu Yu, Jie Huang, Kaiwen Zheng, Feng Zhao

The latter stage exploits the strong generation ability of DDPM to compensate for the haze-induced huge information loss, by working in conjunction with the physical modelling.

Denoising Image Dehazing

Precheck Sequence Based False Base Station Detection During Handover: A Physical Layer Security Scheme

no code implementations3 Jul 2023 Xiangyu Li, Kaiwen Zheng, Sidong Guo, Xiaoli Ma

The source BS compares the uploaded signal power and shifts UE to another BS that can provide the strongest signal.

Improved Techniques for Maximum Likelihood Estimation for Diffusion ODEs

1 code implementation6 May 2023 Kaiwen Zheng, Cheng Lu, Jianfei Chen, Jun Zhu

The probability flow ordinary differential equation (ODE) of diffusion models (i. e., diffusion ODEs) is a particular case of continuous normalizing flows (CNFs), which enables deterministic inference and exact likelihood evaluation.

 Ranked #1 on Image Generation on ImageNet 32x32 (bpd metric)

Image Generation

PREIM3D: 3D Consistent Precise Image Attribute Editing from a Single Image

1 code implementation CVPR 2023 Jianhui Li, Jianmin Li, Haoji Zhang, Shilong Liu, Zhengyi Wang, Zihao Xiao, Kaiwen Zheng, Jun Zhu

As for imprecise image editing, we attribute the problem to the gap between the latent space of real images and that of generated images.

Attribute

Learning Sample Relationship for Exposure Correction

no code implementations CVPR 2023 Jie Huang, Feng Zhao, Man Zhou, Jie Xiao, Naishan Zheng, Kaiwen Zheng, Zhiwei Xiong

Exposure correction task aims to correct the underexposure and its adverse overexposure images to the normal exposure in a single network.

Task 2

Maximum Likelihood Training for Score-Based Diffusion ODEs by High-Order Denoising Score Matching

1 code implementation16 Jun 2022 Cheng Lu, Kaiwen Zheng, Fan Bao, Jianfei Chen, Chongxuan Li, Jun Zhu

To fill up this gap, we show that the negative likelihood of the ODE can be bounded by controlling the first, second, and third-order score matching errors; and we further present a novel high-order denoising score matching method to enable maximum likelihood training of score-based diffusion ODEs.

Denoising

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