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3D scene reconstruction from 2D images has been a long-standing task. Instead of estimating per-frame depth maps and fusing them in 3D, recent research leverages the neural implicit surface as a unified representation for 3D reconstruction.…

Computer Vision and Pattern Recognition · Computer Science 2023-09-19 Xinyi Yu , Liqin Lu , Jintao Rong , Guangkai Xu , Linlin Ou

Edge detection has long been an important problem in the field of computer vision. Previous works have explored category-agnostic or category-aware edge detection. In this paper, we explore edge detection in the context of object instances.…

Computer Vision and Pattern Recognition · Computer Science 2022-04-07 Xueyan Zou , Haotian Liu , Yong Jae Lee

Accurate and consistent construction of point clouds from LiDAR scanning data is fundamental for 3D modeling applications. Current solutions, such as multiview point cloud registration and LiDAR bundle adjustment, predominantly depend on…

Computer Vision and Pattern Recognition · Computer Science 2024-09-24 Jianping Li , Thien-Minh Nguyen , Shenghai Yuan , Lihua Xie

We propose a simple yet effective framework for instance and panoptic segmentation, termed CondInst (conditional convolutions for instance and panoptic segmentation). In the literature, top-performing instance segmentation methods typically…

Computer Vision and Pattern Recognition · Computer Science 2022-01-21 Zhi Tian , Bowen Zhang , Hao Chen , Chunhua Shen

Accurately perceiving and tracking instances over time is essential for the decision-making processes of autonomous agents interacting safely in dynamic environments. With this intention, we propose Mask4Former for the challenging task of…

Computer Vision and Pattern Recognition · Computer Science 2024-04-12 Kadir Yilmaz , Jonas Schult , Alexey Nekrasov , Bastian Leibe

We present a high-performance method that can achieve mask-level instance segmentation with only bounding-box annotations for training. While this setting has been studied in the literature, here we show significantly stronger performance…

Computer Vision and Pattern Recognition · Computer Science 2020-12-07 Zhi Tian , Chunhua Shen , Xinlong Wang , Hao Chen

We introduce the task of open-vocabulary 3D instance segmentation. Current approaches for 3D instance segmentation can typically only recognize object categories from a pre-defined closed set of classes that are annotated in the training…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Ayça Takmaz , Elisabetta Fedele , Robert W. Sumner , Marc Pollefeys , Federico Tombari , Francis Engelmann

Point clouds are often sparse and incomplete. Existing shape completion methods are incapable of generating details of objects or learning the complex point distributions. To this end, we propose a cascaded refinement network together with…

Computer Vision and Pattern Recognition · Computer Science 2020-06-08 Xiaogang Wang , Marcelo H Ang , Gim Hee Lee

Semantic segmentation for robotic systems can enable a wide range of applications, from self-driving cars and augmented reality systems to domestic robots. We argue that a spherical representation is a natural one for egocentric…

Robotics · Computer Science 2022-10-26 Lukas Bernreiter , Lionel Ott , Roland Siegwart , Cesar Cadena

Image saliency detection has recently witnessed rapid progress due to deep convolutional neural networks. However, none of the existing methods is able to identify object instances in the detected salient regions. In this paper, we present…

Computer Vision and Pattern Recognition · Computer Science 2017-04-13 Guanbin Li , Yuan Xie , Liang Lin , Yizhou Yu

Although semi-dense Simultaneous Localization and Mapping (SLAM) has been becoming more popular over the last few years, there is a lack of efficient methods for representing and processing their large scale point clouds. In this paper, we…

Computer Vision and Pattern Recognition · Computer Science 2018-04-30 Shida He , Xuebin Qin , Zichen Zhang , Martin Jagersand

Semantic, instance, and panoptic segmentation of 3D point clouds have been addressed using task-specific models of distinct design. Thereby, the similarity of all segmentation tasks and the implicit relationship between them have not been…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Maxim Kolodiazhnyi , Anna Vorontsova , Anton Konushin , Danila Rukhovich

Despite the progress on 3D point cloud deep learning, most prior works focus on learning features that are invariant to translation and point permutation, and very limited efforts have been devoted for rotation invariant property. Several…

Computer Vision and Pattern Recognition · Computer Science 2024-08-13 Zhiyuan Zhang , Licheng Yang , Zhiyu Xiang

We present a new, embarrassingly simple approach to instance segmentation in images. Compared to many other dense prediction tasks, e.g., semantic segmentation, it is the arbitrary number of instances that have made instance segmentation…

Computer Vision and Pattern Recognition · Computer Science 2020-07-21 Xinlong Wang , Tao Kong , Chunhua Shen , Yuning Jiang , Lei Li

Point-based interactive image segmentation can ease the burden of mask annotation in applications such as semantic segmentation and image editing. However, fully extracting the target mask with limited user inputs remains challenging. We…

Computer Vision and Pattern Recognition · Computer Science 2023-12-25 Chaowei Fang , Ziyin Zhou , Junye Chen , Hanjing Su , Qingyao Wu , Guanbin Li

Most existing self-supervised learning (SSL) approaches for 3D point clouds are dominated by generative methods based on Masked Autoencoders (MAE). However, these generative methods have been proven to struggle to capture high-level…

Computer Vision and Pattern Recognition · Computer Science 2025-12-10 Shaofeng Zhang , Xuanqi Chen , Xiangdong Zhang , Sitong Wu , Junchi Yan

Query-based 3D scene instance segmentation from point clouds has attained notable performance. However, existing methods suffer from the query initialization dilemma due to the sparse nature of point clouds and rely on computationally…

Computer Vision and Pattern Recognition · Computer Science 2026-02-12 Lei Yao , Yi Wang , Yawen Cui , Moyun Liu , Lap-Pui Chau

3D scene understanding has become an essential area of research with applications in autonomous driving, robotics, and augmented reality. Recently, 3D Gaussian Splatting (3DGS) has emerged as a powerful approach, combining explicit modeling…

Computer Vision and Pattern Recognition · Computer Science 2025-04-16 Haijie Li , Yanmin Wu , Jiarui Meng , Qiankun Gao , Zhiyao Zhang , Ronggang Wang , Jian Zhang

Conventional 3D instance segmentation methods rely on labor-intensive 3D annotations for supervised training, which limits their scalability and generalization to novel objects. Recent approaches leverage multi-view 2D masks from the…

Computer Vision and Pattern Recognition · Computer Science 2026-04-13 Yibo Zhao , Yigong Zhang , Jin Xie

We propose a simple yet effective instance segmentation framework, termed CondInst (conditional convolutions for instance segmentation). Top-performing instance segmentation methods such as Mask R-CNN rely on ROI operations (typically…

Computer Vision and Pattern Recognition · Computer Science 2020-07-28 Zhi Tian , Chunhua Shen , Hao Chen