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Weakly-supervised instance segmentation (WSIS) has been considered as a more challenging task than weakly-supervised semantic segmentation (WSSS). Compared to WSSS, WSIS requires instance-wise localization, which is difficult to extract…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Beomyoung Kim , Youngjoon Yoo , Chaeeun Rhee , Junmo Kim

As camera and LiDAR sensors capture complementary information used in autonomous driving, great efforts have been made to develop semantic segmentation algorithms through multi-modality data fusion. However, fusion-based approaches require…

Computer Vision and Pattern Recognition · Computer Science 2022-10-17 Xu Yan , Jiantao Gao , Chaoda Zheng , Chao Zheng , Ruimao Zhang , Shenghui Cui , Zhen Li

Accurate object segmentation is a crucial task in the context of robotic manipulation. However, creating sufficient annotated training data for neural networks is particularly time consuming and often requires manual labeling. To this end,…

Computer Vision and Pattern Recognition · Computer Science 2020-11-09 Wout Boerdijk , Martin Sundermeyer , Maximilian Durner , Rudolph Triebel

To autonomously navigate and plan interactions in real-world environments, robots require the ability to robustly perceive and map complex, unstructured surrounding scenes. Besides building an internal representation of the observed scene…

We present a weakly supervised instance segmentation algorithm based on deep community learning with multiple tasks. This task is formulated as a combination of weakly supervised object detection and semantic segmentation, where individual…

Computer Vision and Pattern Recognition · Computer Science 2020-11-19 Jaedong Hwang , Seohyun Kim , Jeany Son , Bohyung Han

We present two practical improvement techniques for unsupervised segmentation learning. These techniques address limitations in the resolution and accuracy of predicted segmentation maps of recent state-of-the-art methods. Firstly, we…

Computer Vision and Pattern Recognition · Computer Science 2024-12-02 Alp Eren Sari , Francesco Locatello , Paolo Favaro

Weakly supervised nuclei segmentation is a critical problem for pathological image analysis and greatly benefits the community due to the significant reduction of labeling cost. Adopting point annotations, previous methods mostly rely on…

Image and Video Processing · Electrical Eng. & Systems 2022-02-14 Weizhen Liu , Qian He , Xuming He

Unsupervised point cloud segmentation is critical for embodied artificial intelligence and autonomous driving, as it mitigates the prohibitive cost of dense point-level annotations required by fully supervised methods. While integrating 2D…

Computer Vision and Pattern Recognition · Computer Science 2026-05-13 Yixiao Song , Qingyong Li , Wen Wang , Zhicheng Yan

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

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

Segmenting medical images is critical to facilitating both patient diagnoses and quantitative research. A major limiting factor is the lack of labeled data, as obtaining expert annotations for each new set of imaging data and task can be…

Computer Vision and Pattern Recognition · Computer Science 2024-06-27 Chen Liu , Matthew Amodio , Liangbo L. Shen , Feng Gao , Arman Avesta , Sanjay Aneja , Jay C. Wang , Lucian V. Del Priore , Smita Krishnaswamy

An instance with a bad mask might make a composite image that uses it look fake. This encourages us to learn segmentation by generating realistic composite images. To achieve this, we propose a novel framework that exploits a new proposed…

Computer Vision and Pattern Recognition · Computer Science 2018-11-14 Songmin Dai , Xiaoqiang Li , Lu Wang , Pin Wu , Weiqin Tong , Yimin Chen

Instance segmentation of surgical instruments is a long-standing research problem, crucial for the development of many applications for computer-assisted surgery. This problem is commonly tackled via fully-supervised training of deep…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Luca Sestini , Benoit Rosa , Elena De Momi , Giancarlo Ferrigno , Nicolas Padoy

Segmenting unknown or anomalous object instances is a critical task in autonomous driving applications, and it is approached traditionally as a per-pixel classification problem. However, reasoning individually about each pixel without…

Computer Vision and Pattern Recognition · Computer Science 2023-09-14 Shyam Nandan Rai , Fabio Cermelli , Barbara Caputo , Carlo Masone

This paper presents a novel approach to learn and detect distinctive regions on 3D shapes. Unlike previous works, which require labeled data, our method is unsupervised. We conduct the analysis on point sets sampled from 3D shapes, then…

Graphics · Computer Science 2020-04-22 Xianzhi Li , Lequan Yu , Chi-Wing Fu , Daniel Cohen-Or , Pheng-Ann Heng

Self-supervised learning (SSL) can be used to solve complex visual tasks without human labels. Self-supervised representations encode useful semantic information about images, and as a result, they have already been used for tasks such as…

Computer Vision and Pattern Recognition · Computer Science 2023-11-27 Paul Engstler , Luke Melas-Kyriazi , Christian Rupprecht , Iro Laina

Self-supervised learning has transformed 2D computer vision by enabling models trained on large, unannotated datasets to provide versatile off-the-shelf features that perform similarly to models trained with labels. However, in 3D scene…

Computer Vision and Pattern Recognition · Computer Science 2025-04-10 Pedro Hermosilla , Christian Stippel , Leon Sick

In recent years, the state-of-the-art in unsupervised video instance segmentation has heavily relied on synthetic video data, generated from object-centric image datasets such as ImageNet. However, video synthesis by artificially shifting…

Computer Vision and Pattern Recognition · Computer Science 2025-12-17 Leon Sick , Lukas Hoyer , Dominik Engel , Pedro Hermosilla , Timo Ropinski

We propose a novel method for instance label segmentation of dense 3D voxel grids. We target volumetric scene representations, which have been acquired with depth sensors or multi-view stereo methods and which have been processed with…

Computer Vision and Pattern Recognition · Computer Science 2019-11-04 Jean Lahoud , Bernard Ghanem , Marc Pollefeys , Martin R. Oswald

We propose Cut-and-LEaRn (CutLER), a simple approach for training unsupervised object detection and segmentation models. We leverage the property of self-supervised models to 'discover' objects without supervision and amplify it to train a…

Computer Vision and Pattern Recognition · Computer Science 2023-01-27 Xudong Wang , Rohit Girdhar , Stella X. Yu , Ishan Misra