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We propose a mechanism to reconstruct part annotated 3D point clouds of objects given just a single input image. We demonstrate that jointly training for both reconstruction and segmentation leads to improved performance in both the tasks,…

Computer Vision and Pattern Recognition · Computer Science 2018-10-02 Priyanka Mandikal , Navaneet K L , R. Venkatesh Babu

Weakly supervised point cloud semantic segmentation methods that require 1\% or fewer labels, hoping to realize almost the same performance as fully supervised approaches, which recently, have attracted extensive research attention. A…

Computer Vision and Pattern Recognition · Computer Science 2022-09-19 Tianfang Sun , Zhizhong Zhang , Xin Tan , Yanyun Qu , Yuan Xie , Lizhuang Ma

Referring 3D Segmentation is a visual-language task that segments all points of the specified object from a 3D point cloud described by a sentence of query. Previous works perform a two-stage paradigm, first conducting language-agnostic…

Computer Vision and Pattern Recognition · Computer Science 2024-10-29 Xuexun Liu , Xiaoxu Xu , Jinlong Li , Qiudan Zhang , Xu Wang , Nicu Sebe , Lin Ma

Deep learning within the context of point clouds has gained much research interest in recent years mostly due to the promising results that have been achieved on a number of challenging benchmarks, such as 3D shape recognition and scene…

Computer Vision and Pattern Recognition · Computer Science 2018-12-06 Ye Zhu , Sven Ewan Shepstone , Pablo Martínez-Nuevo , Miklas Strøm Kristoffersen , Fabien Moutarde , Zhuang Fu

3D instance segmentation for laser scanning (LiDAR) point clouds remains a challenge in many remote sensing-related domains. Successful solutions typically rely on supervised deep learning and manual annotations, and consequently focus on…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Tomislav Medic , Liangliang Nan

4D LiDAR semantic segmentation, also referred to as multi-scan semantic segmentation, plays a crucial role in enhancing the environmental understanding capabilities of autonomous vehicles or robots. It classifies the semantic category of…

Computer Vision and Pattern Recognition · Computer Science 2024-12-04 Neng Wang , Ruibin Guo , Chenghao Shi , Ziyue Wang , Hui Zhang , Huimin Lu , Zhiqiang Zheng , Xieyuanli Chen

The process of segmenting point cloud data into several homogeneous areas with points in the same region having the same attributes is known as 3D segmentation. Segmentation is challenging with point cloud data due to substantial…

Computer Vision and Pattern Recognition · Computer Science 2025-04-24 Siddiqui Muhammad Yasir , Hyunsik Ahn

Point-cloud semantic segmentation underpins a wide range of critical applications. Although recent deep architectures and large-scale datasets have driven impressive closed-set performance, these models struggle to recognize or properly…

Computer Vision and Pattern Recognition · Computer Science 2025-05-20 Wang Fang , Shirin Rahimi , Olivia Bennett , Sophie Carter , Mitra Hassani , Xu Lan , Omid Javadi , Lucas Mitchell

Understanding objects at the level of their constituent parts is fundamental to advancing computer vision, graphics, and robotics. While datasets like PartNet have driven progress in 3D part understanding, their reliance on untextured…

Computer Vision and Pattern Recognition · Computer Science 2026-04-01 Penghao Wang , Yiyang He , Xin Lv , Yukai Zhou , Lan Xu , Jingyi Yu , Jiayuan Gu

We revisit Semantic Scene Completion (SSC), a useful task to predict the semantic and occupancy representation of 3D scenes, in this paper. A number of methods for this task are always based on voxelized scene representations for keeping…

Computer Vision and Pattern Recognition · Computer Science 2023-03-21 Xiaokang Chen , Jiaxiang Tang , Jingbo Wang , Gang Zeng

3D semantic segmentation on multi-scan large-scale point clouds plays an important role in autonomous systems. Unlike the single-scan-based semantic segmentation task, this task requires distinguishing the motion states of points in…

Computer Vision and Pattern Recognition · Computer Science 2023-07-19 Jiahui Liu , Chirui Chang , Jianhui Liu , Xiaoyang Wu , Lan Ma , Xiaojuan Qi

Recently, weakly-supervised image segmentation using weak annotations like scribbles has gained great attention in computer vision and medical image analysis, since such annotations are much easier to obtain compared to time-consuming and…

Computer Vision and Pattern Recognition · Computer Science 2023-10-13 Qiuhui Chen , Haiying Lyu , Xinyue Hu , Yong Lu , Yi Hong

Reliable 3D instance segmentation is fundamental to language-grounded robotic manipulation. Its critical application lies in cluttered environments, where occlusions, limited viewpoints, and noisy masks degrade perception. To address these…

Computer Vision and Pattern Recognition · Computer Science 2026-02-13 Jeongho Noh , Tai Hyoung Rhee , Eunho Lee , Jeongyun Kim , Sunwoo Lee , Ayoung Kim

Deep learning-based methods are gaining traction in digital pathology, with an increasing number of publications and challenges that aim at easing the work of systematically and exhaustively analyzing tissue slides. These methods often…

Image and Video Processing · Electrical Eng. & Systems 2020-06-25 Ting-An Yen , Hung-Chun Hsu , Pushpak Pati , Maria Gabrani , Antonio Foncubierta-Rodríguez , Pau-Choo Chung

3D scene understanding has been transformed by open-vocabulary language models that enable interaction via natural language. However, at present the evaluation of these representations is limited to datasets with closed-set semantics that…

Computer Vision and Pattern Recognition · Computer Science 2025-10-15 Christina Kassab , Sacha Morin , Martin Büchner , Matías Mattamala , Kumaraditya Gupta , Abhinav Valada , Liam Paull , Maurice Fallon

Semantic segmentation of city-scale point clouds is a critical technology for Unmanned Aerial Vehicle (UAV) perception systems, enabling the classification of 3D points without relying on any visual information to achieve comprehensive 3D…

Computer Vision and Pattern Recognition · Computer Science 2025-08-14 Jialei Xu , Zizhuang Wei , Weikang You , Linyun Li , Weijian Sun

In recent years, deep learning (DL) methods have become powerful tools for biomedical image segmentation. However, high annotation efforts and costs are commonly needed to acquire sufficient biomedical training data for DL models. To…

Computer Vision and Pattern Recognition · Computer Science 2018-06-05 Lin Yang , Yizhe Zhang , Zhuo Zhao , Hao Zheng , Peixian Liang , Michael T. C. Ying , Anil T. Ahuja , Danny Z. Chen

Interactive 3D point cloud segmentation enables efficient annotation of complex 3D scenes through user-guided prompts. However, current approaches are typically restricted in scope to a single domain (indoor or outdoor), and to a single…

Computer Vision and Pattern Recognition · Computer Science 2026-02-11 Aniket Gupta , Hanhui Wang , Charles Saunders , Aruni RoyChowdhury , Hanumant Singh , Huaizu Jiang

We study the task of weakly-supervised point cloud semantic segmentation with sparse annotations (e.g., less than 0.1% points are labeled), aiming to reduce the expensive cost of dense annotations. Unfortunately, with extremely sparse…

Computer Vision and Pattern Recognition · Computer Science 2023-07-21 Lizhao Liu , Zhuangwei Zhuang , Shangxin Huang , Xunlong Xiao , Tianhang Xiang , Cen Chen , Jingdong Wang , Mingkui Tan

Semantic segmentation is an import task in the medical field to identify the exact extent and orientation of significant structures like organs and pathology. Deep neural networks can perform this task well by leveraging the information…

Computer Vision and Pattern Recognition · Computer Science 2019-09-18 Abhijeet Parida , Arianne Tran , Nassir Navab , Shadi Albarqouni