Search Results for author: Yiyi Liao

Found 34 papers, 17 papers with code

Learning 3D-Aware GANs from Unposed Images with Template Feature Field

no code implementations8 Apr 2024 Xinya Chen, Hanlei Guo, Yanrui Bin, Shangzhan Zhang, Yuanbo Yang, Yue Wang, Yujun Shen, Yiyi Liao

Collecting accurate camera poses of training images has been shown to well serve the learning of 3D-aware generative adversarial networks (GANs) yet can be quite expensive in practice.

Pose Estimation

REFRAME: Reflective Surface Real-Time Rendering for Mobile Devices

no code implementations25 Mar 2024 Chaojie Ji, Yufeng Li, Yiyi Liao

This work tackles the challenging task of achieving real-time novel view synthesis on various scenes, including highly reflective objects and unbounded outdoor scenes.

Novel View Synthesis

Recent Trends in 3D Reconstruction of General Non-Rigid Scenes

no code implementations22 Mar 2024 Raza Yunus, Jan Eric Lenssen, Michael Niemeyer, Yiyi Liao, Christian Rupprecht, Christian Theobalt, Gerard Pons-Moll, Jia-Bin Huang, Vladislav Golyanik, Eddy Ilg

Reconstructing models of the real world, including 3D geometry, appearance, and motion of real scenes, is essential for computer graphics and computer vision.

3D Reconstruction Navigate

PanopticNeRF-360: Panoramic 3D-to-2D Label Transfer in Urban Scenes

1 code implementation19 Sep 2023 Xiao Fu, Shangzhan Zhang, Tianrun Chen, Yichong Lu, Xiaowei Zhou, Andreas Geiger, Yiyi Liao

Moreover, PanopticNeRF-360 enables omnidirectional rendering of high-fidelity, multi-view and spatiotemporally consistent appearance, semantic and instance labels.

Self-Driving Cars

UrbanGIRAFFE: Representing Urban Scenes as Compositional Generative Neural Feature Fields

no code implementations ICCV 2023 Yuanbo Yang, Yifei Yang, Hanlei Guo, Rong Xiong, Yue Wang, Yiyi Liao

Generating photorealistic images with controllable camera pose and scene contents is essential for many applications including AR/VR and simulation.

3D-Aware Image Synthesis Object

Painting 3D Nature in 2D: View Synthesis of Natural Scenes from a Single Semantic Mask

no code implementations CVPR 2023 Shangzhan Zhang, Sida Peng, Tianrun Chen, Linzhan Mou, Haotong Lin, Kaicheng Yu, Yiyi Liao, Xiaowei Zhou

We introduce a novel approach that takes a single semantic mask as input to synthesize multi-view consistent color images of natural scenes, trained with a collection of single images from the Internet.

3D-Aware Image Synthesis

Learning 3D-aware Image Synthesis with Unknown Pose Distribution

no code implementations CVPR 2023 Zifan Shi, Yujun Shen, Yinghao Xu, Sida Peng, Yiyi Liao, Sheng Guo, Qifeng Chen, Dit-yan Yeung

Existing methods for 3D-aware image synthesis largely depend on the 3D pose distribution pre-estimated on the training set.

3D-Aware Image Synthesis

SteerNeRF: Accelerating NeRF Rendering via Smooth Viewpoint Trajectory

no code implementations CVPR 2023 Sicheng Li, Hao Li, Yue Wang, Yiyi Liao, Lu Yu

Neural Radiance Fields (NeRF) have demonstrated superior novel view synthesis performance but are slow at rendering.

Novel View Synthesis

Deep Generative Models on 3D Representations: A Survey

1 code implementation27 Oct 2022 Zifan Shi, Sida Peng, Yinghao Xu, Andreas Geiger, Yiyi Liao, Yujun Shen

In this survey, we thoroughly review the ongoing developments of 3D generative models, including methods that employ 2D and 3D supervision.

3D-Aware Image Synthesis 3D Shape Generation

RING++: Roto-translation Invariant Gram for Global Localization on a Sparse Scan Map

1 code implementation12 Oct 2022 Xuecheng Xu, Sha Lu, Jun Wu, Haojian Lu, Qiuguo Zhu, Yiyi Liao, Rong Xiong, Yue Wang

In addition, we derive sufficient conditions of feature extractors for the representation preserving the roto-translation invariance, making RING++ a framework applicable to generic multi-channel features.

Translation

VoxGRAF: Fast 3D-Aware Image Synthesis with Sparse Voxel Grids

1 code implementation15 Jun 2022 Katja Schwarz, Axel Sauer, Michael Niemeyer, Yiyi Liao, Andreas Geiger

State-of-the-art 3D-aware generative models rely on coordinate-based MLPs to parameterize 3D radiance fields.

3D-Aware Image Synthesis Neural Rendering +1

DPCN++: Differentiable Phase Correlation Network for Versatile Pose Registration

no code implementations12 Jun 2022 Zexi Chen, Yiyi Liao, Haozhe Du, Haodong Zhang, Xuecheng Xu, Haojian Lu, Rong Xiong, Yue Wang

Next, the rotation, scale, and translation are independently and efficiently estimated in the spectrum step-by-step using the DPC solver.

Translation

Panoptic NeRF: 3D-to-2D Label Transfer for Panoptic Urban Scene Segmentation

1 code implementation29 Mar 2022 Xiao Fu, Shangzhan Zhang, Tianrun Chen, Yichong Lu, Lanyun Zhu, Xiaowei Zhou, Andreas Geiger, Yiyi Liao

In this work, we present a novel 3D-to-2D label transfer method, Panoptic NeRF, which aims for obtaining per-pixel 2D semantic and instance labels from easy-to-obtain coarse 3D bounding primitives.

Instance Segmentation Scene Segmentation

A Visual Navigation Perspective for Category-Level Object Pose Estimation

1 code implementation25 Mar 2022 Jiaxin Guo, Fangxun Zhong, Rong Xiong, Yunhui Liu, Yue Wang, Yiyi Liao

In this paper, we take a deeper look at the inference of analysis-by-synthesis from the perspective of visual navigation, and investigate what is a good navigation policy for this specific task.

Imitation Learning Pose Estimation +1

On the Frequency Bias of Generative Models

1 code implementation NeurIPS 2021 Katja Schwarz, Yiyi Liao, Andreas Geiger

2) Checkerboard artifacts introduced by upsampling cannot explain the spectral discrepancies alone as the generator is able to compensate for these artifacts.

Attribute

KITTI-360: A Novel Dataset and Benchmarks for Urban Scene Understanding in 2D and 3D

2 code implementations28 Sep 2021 Yiyi Liao, Jun Xie, Andreas Geiger

For the last few decades, several major subfields of artificial intelligence including computer vision, graphics, and robotics have progressed largely independently from each other.

Novel View Synthesis Scene Understanding +2

Learning Interpretable BEV Based VIO without Deep Neural Networks

no code implementations25 Sep 2021 Zexi Chen, Haozhe Du, Xuecheng Xu, Rong Xiong, Yiyi Liao, Yue Wang

Specifically, we first adopt Unscented Kalman Filter as a differentiable layer to predict the pitch and roll, where the covariance matrices of noise are learned to filter out the noise of the IMU raw data.

Autonomous Driving Pose Estimation

Shape As Points: A Differentiable Poisson Solver

1 code implementation NeurIPS 2021 Songyou Peng, Chiyu "Max" Jiang, Yiyi Liao, Michael Niemeyer, Marc Pollefeys, Andreas Geiger

However, the implicit nature of neural implicit representations results in slow inference time and requires careful initialization.

3D Reconstruction Surface Reconstruction

SMD-Nets: Stereo Mixture Density Networks

2 code implementations CVPR 2021 Fabio Tosi, Yiyi Liao, Carolin Schmitt, Andreas Geiger

Despite stereo matching accuracy has greatly improved by deep learning in the last few years, recovering sharp boundaries and high-resolution outputs efficiently remains challenging.

Disparity Estimation Stereo Matching

KiloNeRF: Speeding up Neural Radiance Fields with Thousands of Tiny MLPs

4 code implementations ICCV 2021 Christian Reiser, Songyou Peng, Yiyi Liao, Andreas Geiger

NeRF synthesizes novel views of a scene with unprecedented quality by fitting a neural radiance field to RGB images.

GRAF: Generative Radiance Fields for 3D-Aware Image Synthesis

1 code implementation NeurIPS 2020 Katja Schwarz, Yiyi Liao, Michael Niemeyer, Andreas Geiger

In contrast to voxel-based representations, radiance fields are not confined to a coarse discretization of the 3D space, yet allow for disentangling camera and scene properties while degrading gracefully in the presence of reconstruction ambiguity.

3D-Aware Image Synthesis Novel View Synthesis +1

Towards Unsupervised Learning of Generative Models for 3D Controllable Image Synthesis

1 code implementation CVPR 2020 Yiyi Liao, Katja Schwarz, Lars Mescheder, Andreas Geiger

We define the new task of 3D controllable image synthesis and propose an approach for solving it by reasoning both in 3D space and in the 2D image domain.

Image Generation Object

Deep Marching Cubes: Learning Explicit Surface Representations

1 code implementation CVPR 2018 Yiyi Liao, Simon Donné, Andreas Geiger

Existing learning based solutions to 3D surface prediction cannot be trained end-to-end as they operate on intermediate representations (e. g., TSDF) from which 3D surface meshes must be extracted in a post-processing step (e. g., via the marching cubes algorithm).

On the Integration of Optical Flow and Action Recognition

no code implementations22 Dec 2017 Laura Sevilla-Lara, Yiyi Liao, Fatma Guney, Varun Jampani, Andreas Geiger, Michael J. Black

Here we take a deeper look at the combination of flow and action recognition, and investigate why optical flow is helpful, what makes a flow method good for action recognition, and how we can make it better.

Action Recognition Optical Flow Estimation +1

Parse Geometry from a Line: Monocular Depth Estimation with Partial Laser Observation

4 code implementations17 Oct 2016 Yiyi Liao, Lichao Huang, Yue Wang, Sarath Kodagoda, Yinan Yu, Yong liu

Many standard robotic platforms are equipped with at least a fixed 2D laser range finder and a monocular camera.

Depth Completion

Understand Scene Categories by Objects: A Semantic Regularized Scene Classifier Using Convolutional Neural Networks

no code implementations22 Sep 2015 Yiyi Liao, Sarath Kodagoda, Yue Wang, Lei Shi, Yong liu

As scene images have larger diversity than the iconic object images, it is more challenging for deep learning methods to automatically learn features from scene images with less samples.

Classification General Classification +4

Place classification with a graph regularized deep neural network model

no code implementations12 Jun 2015 Yiyi Liao, Sarath Kodagoda, Yue Wang, Lei Shi, Yong liu

Furthermore, results show that the features automatically learned from the raw input range data can achieve competitive results to the features constructed based on statistical and geometrical information.

Classification General Classification

Image Representation Learning Using Graph Regularized Auto-Encoders

no code implementations3 Dec 2013 Yiyi Liao, Yue Wang, Yong liu

We consider the problem of image representation for the tasks of unsupervised learning and semi-supervised learning.

Clustering Image Clustering +1

Cannot find the paper you are looking for? You can Submit a new open access paper.