Cited by 155Autonomous Vehicle Technology and SafetyAdvanced Neural Network ApplicationsAdvanced Vision and Imaging

CRN: Camera Radar Net for Accurate, Robust, Efficient 3D Perception

Open access
Kim, Youngseok, Shin, Juyeb, Kim, Sanmin, Lee, In-Jae, Choi, Jun Won, Kum, Dongsuk·2023·2023 IEEE/CVF International Conference on Computer Vision (ICCV)

Abstract

Autonomous driving requires an accurate and fast 3D perception system that includes 3D object detection, tracking, and segmentation. Although recent low-cost camera-based approaches have shown promising results, they are susceptible to poor illumination or bad weather conditions and have a large localization error. Hence, fusing camera with low-cost radar, which provides precise long-range measurement and operates reliably in all environments, is promising but has not yet been thoroughly investigated. In this paper, we propose Camera Radar Net (CRN), a novel camera-radar fusion framework that generates a semantically rich and spatially accurate bird’s-eye-view (BEV) feature map for various tasks. To overcome the lack of spatial information in an image, we transform perspective view image features to BEV with the help of sparse but accurate radar points. We further aggregate image and radar feature maps in BEV using multi-modal deformable attention designed to tackle the spatial misalignment between inputs. CRN with real-time setting operates at 20 FPS while achieving comparable performance to LiDAR detectors on nuScenes, and even outperforms at a far distance on 100m setting. Moreover, CRN with offline setting yields 62.4% NDS, 57.5% mAP on nuScenes test set and ranks first among all camera and camera-radar 3D object detectors.

Integrity signals

Registry

Crossref · 10.1109/iccv51070.2023.01615

Cites

63 of 63 references verified0 citation errors · 0 not checkable

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  • CRN uses Radar-Assisted View Transformation to align camera and radar features in BEV and applies multimodal deformable cross-attention for precise fusion.

    “CRN [101] uses Radar-Assisted View Transformation (RVT) to align camera and radar features in BEV and applies multimodal deformable cross-attention (MDCA) for precise fusion.”

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Authors
Kim, Y., Shin, J., Kim, S., Lee, I.-J., Choi, J. W., & Kum, D.
Affiliations
  • KAIST
  • Korea Advanced Institute of Science and Technology (KR)
  • Hanyang University (KR)
Venue
2023 IEEE/CVF International Conference on Computer Vision (ICCV)
Publisher
IEEE
Published
2023-10-01
Pages
17569-17580
OpenAlex
W4390872227
Cited by
155
References
62
Citations by year
2026: 45 · 2025: 64 · 2024: 37 · 2023: 9
FWCI
48.24
Type
conference paper
Language
en
Open access
Locations
  • IEEE/CVF International Conference on Computer Vision (ICCV) (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
National Research Foundation of Korea
Topics
  • Physical Sciences › Engineering › Automotive Engineering › Autonomous Vehicle Technology and Safety
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Neural Network Applications
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Advanced Vision and Imaging
Keywords
radar-camera fusion, 3D object detection, autonomous driving, low-cost radar, sparse point clouds, semantic segmentation, object tracking, real-time perception, nuScenes

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