Ji Hou (侯骥)
I am a Research Scientist at Meta GenAI , working on foundation models. Previously, I was a Research Scientist at XR Tech in Meta Reality Labs working on 3D Scene Understanding. Prior to joining Meta, I did my Ph.D. at TUM Visual Computing Group headed by Prof. Matthias Niessner, where I work on Computer Vision and 3D Scene Understanding.
During my Ph.D., I did an internship at Facebook AI Research (FAIR) with Prof. Saining Xie and Dr. Benjamin Graham on 3D representation and data-efficient learning.
Before that, I obtained my master at RWTH Computer Vision Group headed by Prof. Bastian Leibe, where I studied on Computer Vision and Machine Learning.
I am interested in research and applications on Generative Models on Image/Video/3D, as well as 3D Computer Vision, e.g. 3D Reconstruction, VR/AR, Robotics and Autonomous Driving etc.
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ControlRoom3D: Room Generation using Semantic Proxy Rooms
Jonas Schult,
Sam Tsai,
Lukas Höllein,
Bichen Wu,
Jialiang Wang,
Chih-Yao Ma,
Kunpeng Li,
Xiaofang Wang,
Felix Wimbauer,
Zijian He,
Peizhao Zhang,
Bastian Leibe,
Peter Vajda,
Ji Hou
Computer Vision and Pattern Recognition (CVPR), 2024
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Given a textual description of the overall room style and a rough 3D room layout based on 3D semantic bounding boxes, our method called ControlRoom3D creates diverse and globally plausible 3D room meshes which align well with the room layout.
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Cache Me if You Can: Accelerating Diffusion Models through Block Caching
Felix Wimbauer,
Bichen Wu,
Edgar Schoenfeld,
Xiaoliang Dai,
Ji Hou,
Zijian He,
Artsiom Sanakoyeu,
Peizhao Zhang,
Sam Tsai,
Jonas Kohler,
Christian Rupprecht,
Daniel Cremers,
Peter Vajda,
Jialiang Wang
Computer Vision and Pattern Recognition (CVPR), 2024
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Our block caching technique allows us to avoid these unnecessary computations, therefore speeding up inference by a factor of 1.5x-1.8x while maintaining image quality.
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RIGA: Rotation-Invariant and Globally-Aware Descriptors for Point Cloud Registration
Hao Yu,
Ji Hou,
Zheng Qin,
Mahdi Saleh,
Ivan Shugurov,
Kai Wang,
Benjamin Busam,
Slobodan Ilic
IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), 2024
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Successful point cloud registration relies on accurate correspondences established upon powerful descriptors. However, existing neural descriptors either leverage a rotation-variant backbone whose performance declines under large rotations, or encode local geometry that is less distinctive. To address this issue, we introduce RIGA to learn descriptors that are Rotation-Invariant by design and Globally-Aware.
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NeRF-Det: Learning Geometry-Aware Volumetric Representation for Multi-View 3D Object Detection
Chenfeng Xu,
Bichen Wu,
Ji Hou *,
Sam Tsai,
Ruilong Li,
Jialiang Wang,
Wei Zhan
Zijian He,
Peter Vajda,
Kurt Keutzer,
Masayoshi Tomizuka
International Conference on Computer Vision (ICCV), 2023
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* Corresponding author.
NeRF-Det is a novel method for 3D detection with posed RGB images as input. Our method makes novel use of NeRF in an end-to-end manner to explicitly estimate 3D geometry, thereby improving 3D detection performance.
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Rotation-Invariant Transformer for Point Cloud Matching
Hao Yu,
Zheng Qin,
Ji Hou,
Mahdi Saleh,
Dongsheng Li,
Benjamin Busam,
Slobodan Ilic
Computer Vision and Pattern Recognition (CVPR), 2023
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We introduce RoITr, a Rotation-Invariant Transformer to cope with the pose variations in the point cloud matching task. On the challenging 3DLoMatch benchmark, RoITr surpasses the existing methods by at least 13 and 5 percentage points in terms of the Inlier Ratio and the Registration Recall, respectively
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Mask3D: Pre-training 2D Vision Transformers by Learning Masked 3D Priors
Ji Hou,
Xiaoliang Dai,
Zijian He,
Angela Dai,
Matthias Nießner
Computer Vision and Pattern Recognition (CVPR), 2023
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We demonstrate the Mask3D is particularly effective in embedding 3D priors into the powerful 2D ViT backbone, enabling improved representation learning for various scene understanding tasks, such as semantic segmentation, instance segmentation and object detection.
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PCR-CG: Point Cloud Registration via Deep Explicit Color and Geometry
Yu Zhang,
Junle Yu,
Xiaolin Huang,
Wenhui Zhou,
Ji Hou
European Conference on Computer Vision (ECCV), 2022
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We introduce PCR-CG: a novel 3D point cloud registration module explicitly embedding the color signals into geometry representation. With our designed 2D-3D projection module, the pixel features in a square region centered at correspondences perceived from images are effectively correlated with point cloud representations.
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Pri3D: Can 3D Priors Help 2D Representation Learning?
Ji Hou,
Saining Xie,
Benjamin Graham,
Angela Dai,
Matthias Nießner
International Conference on Computer Vision (ICCV), 2021
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Recent advances in 3D perception have shown impressive progress in understanding geometric structures of 3D shapes and even scenes. Inspired by these advances in geometric understanding, we aim to imbue image-based perception with representations learned under geometric constraints.
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Panoptic 3D Scene Reconstruction From a Single RGB Image
Manuel Dahnert,
Ji Hou,
Matthias Nießner
Angela Dai
Advances in Neural Information Processing System (NeurIPS), 2021
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Inspired by 2D panoptic segmentation, we propose to unify the tasks of geometric reconstruction, 3D semantic segmentation, and 3D instance segmentation into the task of panoptic 3D scene reconstruction -- from a single RGB image, predicting the complete geometric reconstruction of the scene in the camera frustum of the image, along with semantic and instance segmentations.
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Exploring Data-Efficient 3D Scene Understanding with Contrastive Scene Contexts
Ji Hou,
Benjamin Graham,
Matthias Nießner,
Saining Xie
Computer Vision and Pattern Recognition (CVPR), 2021
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Our study reveals that exhaustive labelling of 3D point clouds might be unnecessary; and remarkably, on ScanNet, even using 0.1% of point labels, we still achieve 89% (instance segmentation) and 96% (semantic segmentation) of the baseline performance that uses full annotations.
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RfD-Net: Point Scene Understanding by Semantic Instance Reconstruction
Yinyu Nie,
Ji Hou,
Xiaoguang Han,
Matthias Nießner
Computer Vision and Pattern Recognition (CVPR), 2021
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In this work, we introduce RfD-Net that jointly detects and reconstructs dense object surfaces directly from raw point clouds. Instead of representing scenes with regular grids, our method leverages the sparsity of point cloud data and focuses on predicting shapes that are recognized with high objectness.
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RevealNet: Seeing Behind Objects in RGB-D Scans
Ji Hou,
Angela Dai,
Matthias Nießner
Computer Vision and Pattern Recognition (CVPR), 2020
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This paper introduces the task of semantic instance completion: from an incomplete,
RGB-D scan of a scene, we detect the individual object instances comprising the scene and jointly infer their complete object geometry.
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3D-SIS: 3D Semantic Instance Segmentation of RGB-D Scans
Ji Hou,
Angela Dai,
Matthias Nießner
Computer Vision and Pattern Recognition (CVPR), 2019
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We introduce 3D-SIS, a novel neural network architecture for 3D semantic instance segmentation in commodity RGB-D scans. The core idea of our method is to jointly learn from both geometric and color signal, thus enabling accurate instance predictions.
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IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI)
ACM Transactions on Multimedia Computing Communications and Applications (TOMM)
International Journal of Computer Vision (IJCV)
ISPRS Journal of Photogrammetry and Remote Sensing
IEEE Robotics and Automation Letters (RA-L)
IEEE Transactions on Image Processing (TIP)
Pattern Recognition Letters
Neurocomputing
Computers & Graphics
Special Interest Group on Computer Graphics and Interactive Techniques (SIGGRAPH)
Conference on Computer Vision and Pattern Recognition (CVPR)
International Conference on Computer Vision (ICCV)
European Conference on Computer Vision (ECCV)
International Conference on Machine Learning (ICML)
Neural Information Processing Systems (NeurIPS)
International Conference on Learning Representations (ICLR)
International Conference on Robotics and Automation (ICRA)
Association for the Advancement of Artificial Intelligence (AAAI)
International Joint Conference on Artificial Intelligence (IJCAI)
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