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Accurate 3D object detection is vital for automated driving. While lidar sensors are well suited for this task, they are expensive and have limitations in adverse weather conditions. 3+1D imaging radar sensors offer a cost-effective, robust…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Patrick Palmer , Martin Krüger , Stefan Schütte , Richard Altendorfer , Ganesh Adam , Torsten Bertram

With the recent growth of urban mapping and autonomous driving efforts, there has been an explosion of raw 3D data collected from terrestrial platforms with lidar scanners and color cameras. However, due to high labeling costs, ground-truth…

Computer Vision and Pattern Recognition · Computer Science 2021-10-22 Kyle Genova , Xiaoqi Yin , Abhijit Kundu , Caroline Pantofaru , Forrester Cole , Avneesh Sud , Brian Brewington , Brian Shucker , Thomas Funkhouser

In autonomous driving, 3D object detection provides more precise information for downstream tasks, including path planning and motion estimation, compared to 2D object detection. In this paper, we propose SeSame: a method aimed at enhancing…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Hayeon O , Chanuk Yang , Kunsoo Huh

Monocular 3D object detection is a low-cost but challenging task, as it requires generating accurate 3D localization solely from a single image input. Recent developed depth-assisted methods show promising results by using explicit depth…

Computer Vision and Pattern Recognition · Computer Science 2023-07-04 Zizhang Wu , Yunzhe Wu , Jian Pu , Xianzhi Li , Xiaoquan Wang

Annotating large-scale LiDAR point clouds for 3D semantic segmentation is costly and time-consuming, which motivates the use of semi-supervised learning (SemiSL). Standard LiDAR SemiSL methods typically adopt a two-step training paradigm,…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Bin Yang , Alexandru Paul Condurache

3D object detection is an essential task in autonomous driving. Recent techniques excel with highly accurate detection rates, provided the 3D input data is obtained from precise but expensive LiDAR technology. Approaches based on cheaper…

Computer Vision and Pattern Recognition · Computer Science 2020-02-25 Yan Wang , Wei-Lun Chao , Divyansh Garg , Bharath Hariharan , Mark Campbell , Kilian Q. Weinberger

Knowledge Distillation (KD) has been used in image classification for model compression. However, rare studies apply this technology on single-stage object detectors. Focal loss shows that the accumulated errors of easily-classified samples…

Computer Vision and Pattern Recognition · Computer Science 2019-01-15 Shitao Tang , Litong Feng , Wenqi Shao , Zhanghui Kuang , Wei Zhang , Yimin Chen

Computer vision tasks are traditionally defined and evaluated using semantic categories. However, it is known to the field that semantic classes do not necessarily correspond to a unique visual class (e.g. inside and outside of a car).…

Computer Vision and Pattern Recognition · Computer Science 2014-05-27 Hossein Azizpour , Stefan Carlsson

In this paper, we introduces a new type of line-shaped image representation, named semantic line segment (Sem-LS) and focus on solving its detection problem. Sem-LS contains high-level semantics and is a compact scene representation where…

Computer Vision and Pattern Recognition · Computer Science 2020-01-01 Yi Sun , Xushen Han , Kai Sun , Boren Li , Yongjiang Chen , Mingyang Li

LiDAR is used in autonomous driving to provide 3D spatial information and enable accurate perception in off-road environments, aiding in obstacle detection, mapping, and path planning. Learning-based LiDAR semantic segmentation utilizes…

Computer Vision and Pattern Recognition · Computer Science 2024-09-02 Kasi Viswanath , Peng Jiang , Sujit PB , Srikanth Saripalli

Monocular 3D detection (M3D) aims for precise 3D object localization from a single-view image which usually involves labor-intensive annotation of 3D detection boxes. Weakly supervised M3D has recently been studied to obviate the 3D…

Computer Vision and Pattern Recognition · Computer Science 2024-03-01 Xueying Jiang , Sheng Jin , Lewei Lu , Xiaoqin Zhang , Shijian Lu

LIDAR semantic segmentation, which assigns a semantic label to each 3D point measured by the LIDAR, is becoming an essential task for many robotic applications such as autonomous driving. Fast and efficient semantic segmentation methods are…

Computer Vision and Pattern Recognition · Computer Science 2021-04-28 Iñigo Alonso , Luis Riazuelo , Luis Montesano , Ana C. Murillo

Semantic segmentation of LiDAR point clouds is an important task in autonomous driving. However, training deep models via conventional supervised methods requires large datasets which are costly to label. It is critical to have…

Computer Vision and Pattern Recognition · Computer Science 2022-10-18 Minghua Liu , Yin Zhou , Charles R. Qi , Boqing Gong , Hao Su , Dragomir Anguelov

Score Distillation Sampling (SDS) enables high-quality text-to-3D generation by supervising 3D models through the denoising of multi-view 2D renderings, using a pretrained text-to-image diffusion model to align with the input prompt and…

Computer Vision and Pattern Recognition · Computer Science 2025-09-22 Weimin Bai , Yubo Li , Weijian Luo , Wenzheng Chen , He Sun

3D point cloud semantic segmentation is one of the fundamental tasks for environmental understanding. Although significant progress has been made in recent years, the performance of classes with few examples or few points is still far from…

Computer Vision and Pattern Recognition · Computer Science 2023-05-01 Shoumeng Qiu , Feng Jiang , Haiqiang Zhang , Xiangyang Xue , Jian Pu

LiDAR odometry estimation and 3D semantic segmentation are crucial for autonomous driving, which has achieved remarkable advances recently. However, these tasks are challenging due to the imbalance of points in different semantic categories…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Guanqun Ding , Nevrez Imamoglu , Ali Caglayan , Masahiro Murakawa , Ryosuke Nakamura

Object segmentation in three-dimensional (3-D) point clouds is a critical task for robots capable of 3-D perception. Despite the impressive performance of deep learning-based approaches on object segmentation in 2-D images, deep learning…

Image and Video Processing · Electrical Eng. & Systems 2019-10-31 Brian H. Wang , Wei-Lun Chao , Yan Wang , Bharath Hariharan , Kilian Q. Weinberger , Mark Campbell

Diverse decoding of large language models is crucial for applications requiring multiple semantically distinct responses, yet existing methods primarily achieve lexical rather than semantic diversity. This limitation significantly…

Computation and Language · Computer Science 2025-09-30 Weijie Shi , Yue Cui , Yaguang Wu , Jingzhi Fang , Shibo Zhang , Mengze Li , Sirui Han , Jia Zhu , Jiajie Xu , Xiaofang Zhou

Monocular 3D lane detection is challenging due to the difficulty in capturing depth information from single-camera images. A common strategy involves transforming front-view (FV) images into bird's-eye-view (BEV) space through inverse…

Computer Vision and Pattern Recognition · Computer Science 2025-09-03 Dongxin Lyu , Han Huang , Cheng Tan , Zimu Li

Recent advances in automotive four-dimensional (4D) Radar have enabled access to raw 4D Radar Tensor (4DRT), offering richer spatial and Doppler information than conventional point clouds. While most existing methods rely on heavily…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Seung-Hyun Song , Dong-Hee Paek , Minh-Quan Dao , Ezio Malis , Seung-Hyun Kong