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This paper addresses the critical challenges of sparsity and occlusion in LiDAR-based 3D object detection. Current methods often rely on supplementary modules or specific architectural designs, potentially limiting their applicability to…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Alexander Gambashidze , Aleksandr Dadukin , Maksim Golyadkin , Maria Razzhivina , Ilya Makarov

Reconstructing 3D objects from extremely sparse views is a long-standing and challenging problem. While recent techniques employ image diffusion models for generating plausible images at novel viewpoints or for distilling pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2023-12-21 Zi-Xin Zou , Weihao Cheng , Yan-Pei Cao , Shi-Sheng Huang , Ying Shan , Song-Hai Zhang

3D pedestrian detection is a challenging task in automated driving because pedestrians are relatively small, frequently occluded and easily confused with narrow vertical objects. LiDAR and camera are two commonly used sensor modalities for…

Robotics · Computer Science 2021-03-30 Juncong Fei , Wenbo Chen , Philipp Heidenreich , Sascha Wirges , Christoph Stiller

In this paper, we propose an efficient feature pruning strategy for 3D small object detection. Conventional 3D object detection methods struggle on small objects due to the weak geometric information from a small number of points. Although…

Computer Vision and Pattern Recognition · Computer Science 2024-07-16 Xiuwei Xu , Zhihao Sun , Ziwei Wang , Hongmin Liu , Jie Zhou , Jiwen Lu

Three-dimensional (3D) medical image enhancement, including denoising and super-resolution, is critical for clinical diagnosis in CT, PET, and MRI. Although diffusion models have shown remarkable success in 2D medical imaging, scaling them…

Computer Vision and Pattern Recognition · Computer Science 2026-04-21 Hongxu Jiang , Fei Li , Boxiao Yu , Ying Zhang , Kaleb Smith , Kuang Gong , Wei Shao

3D occupancy, an advanced perception technology for driving scenarios, represents the entire scene without distinguishing between foreground and background by quantifying the physical space into a grid map. The widely adopted…

Computer Vision and Pattern Recognition · Computer Science 2024-07-15 Jinke Li , Xiao He , Chonghua Zhou , Xiaoqiang Cheng , Yang Wen , Dan Zhang

Transformers are a popular choice for classification tasks and as backbones for object detection tasks. However, their high latency brings challenges in their adaptation to lightweight object detection systems. We present an approximation…

Computer Vision and Pattern Recognition · Computer Science 2022-10-11 Dharma KC , Venkata Ravi Kiran Dayana , Meng-Lin Wu , Venkateswara Rao Cherukuri , Hau Hwang

Transformers have proven superior performance for a wide variety of tasks since they were introduced. In recent years, they have drawn attention from the vision community in tasks such as image classification and object detection. Despite…

Computer Vision and Pattern Recognition · Computer Science 2022-10-03 Yihong Xu , Yutong Ban , Guillaume Delorme , Chuang Gan , Daniela Rus , Xavier Alameda-Pineda

Recent advances in point cloud object detection have increasingly adopted Transformer-based and State Space Models (SSMs) to capture long-range dependencies. However, these serialized frameworks strictly maintain the consistency of input…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Qifeng Liu , Dawei Zhao , Yabo Dong , Linzhi Shang , Liang Xiao , Juan Wang , Kunkong Zhao , Dongming Lu , Qi Zhu

Transformer architecture has been showing its great strength in visual object tracking, for its effective attention mechanism. Existing transformer-based approaches adopt the pixel-to-pixel attention strategy on flattened image features and…

Computer Vision and Pattern Recognition · Computer Science 2022-05-10 Zikai Song , Junqing Yu , Yi-Ping Phoebe Chen , Wei Yang

The rise of autonomous vehicles has significantly increased the demand for robust 3D object detection systems. While cameras and LiDAR sensors each offer unique advantages--cameras provide rich texture information and LiDAR offers precise…

Computer Vision and Pattern Recognition · Computer Science 2025-07-04 Zitian Wang , Zehao Huang , Yulu Gao , Naiyan Wang , Si Liu

We present 3DiffTection, a state-of-the-art method for 3D object detection from single images, leveraging features from a 3D-aware diffusion model. Annotating large-scale image data for 3D detection is resource-intensive and time-consuming.…

Computer Vision and Pattern Recognition · Computer Science 2023-11-09 Chenfeng Xu , Huan Ling , Sanja Fidler , Or Litany

In this work, we present a conceptually simple yet effective framework for cross-modality 3D object detection, named voxel field fusion. The proposed approach aims to maintain cross-modality consistency by representing and fusing augmented…

Computer Vision and Pattern Recognition · Computer Science 2022-06-01 Yanwei Li , Xiaojuan Qi , Yukang Chen , Liwei Wang , Zeming Li , Jian Sun , Jiaya Jia

Scene flow estimation aims to generate the 3D motion field of points between two consecutive frames of point clouds, which has wide applications in various fields. Existing point-based methods ignore the irregularity of point clouds and…

Computer Vision and Pattern Recognition · Computer Science 2025-01-22 Xuezhi Xiang , Xi Wang , Lei Zhang , Denis Ombati , Himaloy Himu , Xiantong Zhen

Good 3D object detection performance from LiDAR-Camera sensors demands seamless feature alignment and fusion strategies. We propose the 3DifFusionDet framework in this paper, which structures 3D object detection as a denoising diffusion…

Computer Vision and Pattern Recognition · Computer Science 2023-11-08 Xinhao Xiang , Simon Dräger , Jiawei Zhang

3D multi-object tracking (MOT) is vital for many applications including autonomous driving vehicles and service robots. With the commonly used tracking-by-detection paradigm, 3D MOT has made important progress in recent years. However,…

Computer Vision and Pattern Recognition · Computer Science 2023-08-21 Xuesong Chen , Shaoshuai Shi , Chao Zhang , Benjin Zhu , Qiang Wang , Ka Chun Cheung , Simon See , Hongsheng Li

We propose a novel point cloud U-Net diffusion architecture for 3D generative modeling capable of generating high-quality and diverse 3D shapes while maintaining fast generation times. Our network employs a dual-branch architecture,…

Computer Vision and Pattern Recognition · Computer Science 2024-08-13 Ioannis Romanelis , Vlassios Fotis , Athanasios Kalogeras , Christos Alexakos , Konstantinos Moustakas , Adrian Munteanu

Small objects detection is a challenging task in computer vision due to its limited resolution and information. In order to solve this problem, the majority of existing methods sacrifice speed for improvement in accuracy. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2018-11-28 Guimei Cao , Xuemei Xie , Wenzhe Yang , Quan Liao , Guangming Shi , Jinjian Wu

Very recently, Window-based Transformers, which computed self-attention within non-overlapping local windows, demonstrated promising results on image classification, semantic segmentation, and object detection. However, less study has been…

Computer Vision and Pattern Recognition · Computer Science 2021-06-08 Zilong Huang , Youcheng Ben , Guozhong Luo , Pei Cheng , Gang Yu , Bin Fu

Object detection in point cloud data is one of the key components in computer vision systems, especially for autonomous driving applications. In this work, we present Voxel-FPN, a novel one-stage 3D object detector that utilizes raw data…

Computer Vision and Pattern Recognition · Computer Science 2019-07-17 Bei Wang , Jianping An , Jiayan Cao