Search Results for author: Xuanchi Ren

Found 17 papers, 14 papers with code

Cosmos-Drive-Dreams: Scalable Synthetic Driving Data Generation with World Foundation Models

1 code implementation10 Jun 2025 Xuanchi Ren, Yifan Lu, Tianshi Cao, Ruiyuan Gao, Shengyu Huang, Amirmojtaba Sabour, Tianchang Shen, Tobias Pfaff, Jay Zhangjie Wu, Runjian Chen, Seung Wook Kim, Jun Gao, Laura Leal-Taixe, Mike Chen, Sanja Fidler, Huan Ling

To address this challenge, we introduce the Cosmos-Drive-Dreams - a synthetic data generation (SDG) pipeline that aims to generate challenging scenarios to facilitate downstream tasks such as perception and driving policy training.

3D Lane Detection 3D Object Detection +3

GEN3C: 3D-Informed World-Consistent Video Generation with Precise Camera Control

1 code implementation CVPR 2025 Xuanchi Ren, Tianchang Shen, Jiahui Huang, Huan Ling, Yifan Lu, Merlin Nimier-David, Thomas Müller, Alexander Keller, Sanja Fidler, Jun Gao

Our results demonstrate more precise camera control than prior work, as well as state-of-the-art results in sparse-view novel view synthesis, even in challenging settings such as driving scenes and monocular dynamic video.

Novel View Synthesis Video Generation

Difix3D+: Improving 3D Reconstructions with Single-Step Diffusion Models

no code implementations CVPR 2025 Jay Zhangjie Wu, Yuxuan Zhang, Haithem Turki, Xuanchi Ren, Jun Gao, Mike Zheng Shou, Sanja Fidler, Zan Gojcic, Huan Ling

At the core of our approach is Difix, a single-step image diffusion model trained to enhance and remove artifacts in rendered novel views caused by underconstrained regions of the 3D representation.

3DGS 3D Reconstruction +2

SCube: Instant Large-Scale Scene Reconstruction using VoxSplats

no code implementations26 Oct 2024 Xuanchi Ren, Yifan Lu, Hanxue Liang, Zhangjie Wu, Huan Ling, Mike Chen, Sanja Fidler, Francis Williams, Jiahui Huang

We present SCube, a novel method for reconstructing large-scale 3D scenes (geometry, appearance, and semantics) from a sparse set of posed images.

3D Reconstruction Scene Generation

XCube: Large-Scale 3D Generative Modeling using Sparse Voxel Hierarchies

1 code implementation CVPR 2024 Xuanchi Ren, Jiahui Huang, Xiaohui Zeng, Ken Museth, Sanja Fidler, Francis Williams

We present XCube (abbreviated as $\mathcal{X}^3$), a novel generative model for high-resolution sparse 3D voxel grids with arbitrary attributes.

3D Shape Generation Scene Generation +1

Blind Video Deflickering by Neural Filtering with a Flawed Atlas

1 code implementation CVPR 2023 Chenyang Lei, Xuanchi Ren, Zhaoxiang Zhang, Qifeng Chen

Prior work usually requires specific guidance such as the flickering frequency, manual annotations, or extra consistent videos to remove the flicker.

Video Generation Video Temporal Consistency

Look Outside the Room: Synthesizing A Consistent Long-Term 3D Scene Video from A Single Image

1 code implementation CVPR 2022 Xuanchi Ren, Xiaolong Wang

Novel view synthesis from a single image has recently attracted a lot of attention, and it has been primarily advanced by 3D deep learning and rendering techniques.

Novel View Synthesis

Retriever: Learning Content-Style Representation as a Token-Level Bipartite Graph

2 code implementations ICLR 2022 Dacheng Yin, Xuanchi Ren, Chong Luo, Yuwang Wang, Zhiwei Xiong, Wenjun Zeng

Last, an innovative link attention module serves as the decoder to reconstruct data from the decomposed content and style, with the help of the linking keys.

Decoder Quantization +2

Learning Disentangled Representation by Exploiting Pretrained Generative Models: A Contrastive Learning View

2 code implementations ICLR 2022 Xuanchi Ren, Tao Yang, Yuwang Wang, Wenjun Zeng

Based on this observation, we argue that it is possible to mitigate the trade-off by $(i)$ leveraging the pretrained generative models with high generation quality, $(ii)$ focusing on discovering the traversal directions as factors for disentangled representation learning.

Contrastive Learning Disentanglement

Rethinking Content and Style: Exploring Bias for Unsupervised Disentanglement

1 code implementation21 Feb 2021 Xuanchi Ren, Tao Yang, Yuwang Wang, Wenjun Zeng

From the unsupervised disentanglement perspective, we rethink content and style and propose a formulation for unsupervised C-S disentanglement based on our assumption that different factors are of different importance and popularity for image reconstruction, which serves as a data bias.

3D Reconstruction Disentanglement +4

Towards Building A Group-based Unsupervised Representation Disentanglement Framework

1 code implementation ICLR 2022 Tao Yang, Xuanchi Ren, Yuwang Wang, Wenjun Zeng, Nanning Zheng

We then propose a model, based on existing VAE-based methods, to tackle the unsupervised learning problem of the framework.

Disentanglement

Video Deblurring by Fitting to Test Data

1 code implementation9 Dec 2020 Xuanchi Ren, Zian Qian, Qifeng Chen

Our key observation is that some frames in a video with motion blur are much sharper than others, and thus we can transfer the texture information in those sharp frames to blurry frames.

Autonomous Vehicles Deblurring +1

Music-oriented Dance Video Synthesis with Pose Perceptual Loss

1 code implementation13 Dec 2019 Xuanchi Ren, Haoran Li, Zijian Huang, Qifeng Chen

We present a learning-based approach with pose perceptual loss for automatic music video generation.

Video Generation

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