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Weakly supervised 3D instance segmentation is essential for 3D scene understanding, especially as the growing scale of data and high annotation costs associated with fully supervised approaches. Existing methods primarily rely on two forms…

Computer Vision and Pattern Recognition · Computer Science 2025-11-26 Xuexun Liu , Xiaoxu Xu , Qiudan Zhang , Lin Ma , Xu Wang

Consistent surgical instrument segmentation is critical for automation in robot-assisted surgery. Yet, existing methods only treat instrument-level instance segmentation (IIS) or part-level semantic segmentation (PSS) separately, without…

Computer Vision and Pattern Recognition · Computer Science 2025-07-29 Meng Wei , Charlie Budd , Oluwatosin Alabi , Miaojing Shi , Tom Vercauteren

Semantic segmentation of point cloud usually relies on dense annotation that is exhausting and costly, so it attracts wide attention to investigate solutions for the weakly supervised scheme with only sparse points annotated. Existing works…

Computer Vision and Pattern Recognition · Computer Science 2023-12-11 Yushuang Wu , Zizheng Yan , Shengcai Cai , Guanbin Li , Yizhou Yu , Xiaoguang Han , Shuguang Cui

Both limited annotation and domain shift are prevalent challenges in medical image segmentation. Traditional semi-supervised segmentation and unsupervised domain adaptation methods address one of these issues separately. However, the…

Computer Vision and Pattern Recognition · Computer Science 2024-08-19 Qinghe Ma , Jian Zhang , Lei Qi , Qian Yu , Yinghuan Shi , Yang Gao

Semantic segmentation of 3D LiDAR point clouds, essential for autonomous driving and infrastructure management, is best achieved by supervised learning, which demands extensive annotated datasets and faces the problem of domain shifts. We…

Computer Vision and Pattern Recognition · Computer Science 2025-05-07 Andrew Caunes , Thierry Chateau , Vincent Frémont

Though image-level weakly supervised semantic segmentation (WSSS) has achieved great progress with Class Activation Maps (CAMs) as the cornerstone, the large supervision gap between classification and segmentation still hampers the model to…

Computer Vision and Pattern Recognition · Computer Science 2022-03-15 Ye Du , Zehua Fu , Qingjie Liu , Yunhong Wang

A main bottleneck of learning-based robotic scene understanding methods is the heavy reliance on extensive annotated training data, which often limits their generalization ability. In LiDAR panoptic segmentation, this challenge becomes even…

Computer Vision and Pattern Recognition · Computer Science 2025-07-10 Ahmet Selim Çanakçı , Niclas Vödisch , Kürsat Petek , Wolfram Burgard , Abhinav Valada

In this paper, we propose a conceptually novel, efficient, and fully convolutional framework for real-time instance segmentation. Previously, most instance segmentation methods heavily rely on object detection and perform mask prediction…

Computer Vision and Pattern Recognition · Computer Science 2022-03-25 Tianheng Cheng , Xinggang Wang , Shaoyu Chen , Wenqiang Zhang , Qian Zhang , Chang Huang , Zhaoxiang Zhang , Wenyu Liu

We present a lightweight post-processing method to refine the semantic segmentation results of point cloud sequences. Most existing methods usually segment frame by frame and encounter the inherent ambiguity of the problem: based on a…

Computer Vision and Pattern Recognition · Computer Science 2022-12-02 Yutaka Momma , Weimin Wang , Edgar Simo-Serra , Satoshi Iizuka , Ryosuke Nakamura , Hiroshi Ishikawa

Current 3D segmentation methods heavily rely on large-scale point-cloud datasets, which are notoriously laborious to annotate. Few attempts have been made to circumvent the need for dense per-point annotations. In this work, we look at…

Computer Vision and Pattern Recognition · Computer Science 2023-11-01 Julian Chibane , Francis Engelmann , Tuan Anh Tran , Gerard Pons-Moll

The task of unsupervised semantic segmentation aims to cluster pixels into semantically meaningful groups. Specifically, pixels assigned to the same cluster should share high-level semantic properties like their object or part category.…

Computer Vision and Pattern Recognition · Computer Science 2022-06-14 Wouter Van Gansbeke , Simon Vandenhende , Luc Van Gool

Recent advances in self-supervised learning (SSL) have shown tremendous potential for learning 3D point cloud representations without human annotations. However, SSL for 3D point clouds still faces critical challenges due to irregular…

Computer Vision and Pattern Recognition · Computer Science 2025-12-15 Mohamed Abdelsamad , Michael Ulrich , Bin Yang , Miao Zhang , Yakov Miron , Abhinav Valada

Recently, sparsely-supervised 3D object detection has gained great attention, achieving performance close to fully-supervised 3D objectors while requiring only a few annotated instances. Nevertheless, these methods suffer challenges when…

Computer Vision and Pattern Recognition · Computer Science 2025-03-11 Shijia Zhao , Qiming Xia , Xusheng Guo , Pufan Zou , Maoji Zheng , Hai Wu , Chenglu Wen , Cheng Wang

In this paper, we introduce a novel learning scheme named weakly semi-supervised instance segmentation (WSSIS) with point labels for budget-efficient and high-performance instance segmentation. Namely, we consider a dataset setting…

Computer Vision and Pattern Recognition · Computer Science 2023-03-28 Beomyoung Kim , Joonhyun Jeong , Dongyoon Han , Sung Ju Hwang

Referring image segmentation (RIS) aims to segment a particular region based on a language expression prompt. Existing methods incorporate linguistic features into visual features and obtain multi-modal features for mask decoding. However,…

Computer Vision and Pattern Recognition · Computer Science 2024-05-22 Mengxi Zhang , Yiming Liu , Xiangjun Yin , Huanjing Yue , Jingyu Yang

In unsupervised domain adaptive (UDA) semantic segmentation, the distillation based methods are currently dominant in performance. However, the distillation technique requires complicate multi-stage process and many training tricks. In this…

Computer Vision and Pattern Recognition · Computer Science 2022-08-15 Junjie Li , Zilei Wang , Yuan Gao , Xiaoming Hu

Segment Anything Model (SAM) is an advanced foundational model for image segmentation, which is gradually being applied to remote sensing images (RSIs). Due to the domain gap between RSIs and natural images, traditional methods typically…

Computer Vision and Pattern Recognition · Computer Science 2025-01-14 Nanqing Liu , Xun Xu , Yongyi Su , Haojie Zhang , Heng-Chao Li

Semantic Scene Completion (SSC) constitutes a pivotal element in autonomous driving perception systems, tasked with inferring the 3D semantic occupancy of a scene from sensory data. To improve accuracy, prior research has implemented…

Computer Vision and Pattern Recognition · Computer Science 2025-03-18 Ruoyu Wang , Yukai Ma , Yi Yao , Sheng Tao , Haoang Li , Zongzhi Zhu , Yong Liu , Xingxing Zuo

We introduce Medal S, a medical segmentation foundation model that supports native-resolution spatial and textual prompts within an end-to-end trainable framework. Unlike text-only methods lacking spatial awareness, Medal S achieves…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Pengcheng Shi , Jiawei Chen , Jiaqi Liu , Xinglin Zhang , Tao Chen , Lei Li

Segment Anything Model (SAM) has demonstrated powerful zero-shot segmentation performance in natural scenes. The recently released Segment Anything Model 2 (SAM2) has further heightened researchers' expectations towards image segmentation…

Computer Vision and Pattern Recognition · Computer Science 2024-10-03 Jialun Pei , Zhangjun Zhou , Tiantian Zhang
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