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We propose an interactive approach for 3D instance segmentation, where users can iteratively collaborate with a deep learning model to segment objects in a 3D point cloud directly. Current methods for 3D instance segmentation are generally…

Computer Vision and Pattern Recognition · Computer Science 2023-01-24 Theodora Kontogianni , Ekin Celikkan , Siyu Tang , Konrad Schindler

Unsupervised instance segmentation aims to segment distinct object instances in an image without relying on human-labeled data. This field has recently seen significant advancements, partly due to the strong local correspondences afforded…

Computer Vision and Pattern Recognition · Computer Science 2024-09-30 Dylan Li , Gyungin Shin

Despite its importance, unsupervised domain adaptation (UDA) on LiDAR semantic segmentation is a task that has not received much attention from the research community. Only recently, a completion-based 3D method has been proposed to tackle…

Computer Vision and Pattern Recognition · Computer Science 2022-05-24 Eojindl Yi , Juyoung Yang , Junmo Kim

We focus on the problem of class-agnostic instance segmentation of LiDAR point clouds. We propose an approach that combines graph-theoretic search with data-driven learning: it searches over a set of candidate segmentations and returns one…

Robotics · Computer Science 2019-12-12 Peiyun Hu , David Held , Deva Ramanan

Due to the wide existence and large morphological variances of nuclei, accurate nuclei instance segmentation is still one of the most challenging tasks in computational pathology. The annotating of nuclei instances, requiring experienced…

Computer Vision and Pattern Recognition · Computer Science 2020-07-23 Xinpeng Xie , Jiawei Chen , Yuexiang Li , Linlin Shen , Kai Ma , Yefeng Zheng

LiDAR data of urban scenarios poses unique challenges, such as heterogeneous characteristics and inherent class imbalance. Therefore, large-scale datasets are necessary to apply deep learning methods. Instance augmentation has emerged as an…

Computer Vision and Pattern Recognition · Computer Science 2024-08-28 Laurenz Reichardt , Luca Uhr , Oliver Wasenmüller

We present Adaptive Instance Selection network architecture for class-agnostic instance segmentation. Given an input image and a point $(x, y)$, it generates a mask for the object located at $(x, y)$. The network adapts to the input point…

Computer Vision and Pattern Recognition · Computer Science 2019-09-18 Konstantin Sofiiuk , Olga Barinova , Anton Konushin

Data annotation is crucial for developing machine learning solutions. The current paradigm is to hire ordinary human annotators to annotate data instructed by expert-crafted guidelines. As this paradigm is laborious, tedious, and costly, we…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Yechi Ma , Wei Hua , Shu Kong

The rapid progress in 3D scene understanding has come with growing demand for data; however, collecting and annotating 3D scenes (e.g. point clouds) are notoriously hard. For example, the number of scenes (e.g. indoor rooms) that can be…

Computer Vision and Pattern Recognition · Computer Science 2021-06-29 Ji Hou , Benjamin Graham , Matthias Nießner , Saining Xie

Instance segmentation is crucial for autonomous driving, but is hindered by the lack of annotated real-world data due to expensive labeling costs. Unsupervised Domain Adaptation (UDA) offers a solution by transferring knowledge from labeled…

Computer Vision and Pattern Recognition · Computer Science 2025-06-23 Yachan Guo , Yi Xiao , Danna Xue , Jose L. Gomez , Antonio M. Lopez

This article presents a complete semantic scene understanding workflow using only a single 2D lidar. This fills the gap in 2D lidar semantic segmentation, thereby enabling the rethinking and enhancement of existing 2D lidar-based algorithms…

Robotics · Computer Science 2026-01-27 Zhanteng Xie , Yipeng Pan , Yinqiang Zhang , Jia Pan , Philip Dames

3D scene understanding, e.g., point cloud semantic and instance segmentation, often requires large-scale annotated training data, but clearly, point-wise labels are too tedious to prepare. While some recent methods propose to train a 3D…

Computer Vision and Pattern Recognition · Computer Science 2023-09-13 Zhengzhe Liu , Xiaojuan Qi , Chi-Wing Fu

Understanding the surrounding environment is fundamental in autonomous driving and robotic perception. Distinguishing between known classes and previously unseen objects is crucial in real-world environments, as done in Anomaly…

Computer Vision and Pattern Recognition · Computer Science 2026-04-28 Simone Mosco , Daniel Fusaro , Alberto Pretto

Object detection and semantic segmentation with the 3D lidar point cloud data require expensive annotation. We propose a data augmentation method that takes advantage of already annotated data multiple times. We propose an augmentation…

Computer Vision and Pattern Recognition · Computer Science 2023-02-28 Petr Šebek , Šimon Pokorný , Patrik Vacek , Tomáš Svoboda

Inspired by recent advances of deep learning in instance segmentation and object tracking, we introduce video object segmentation problem as a concept of guided instance segmentation. Our model proceeds on a per-frame basis, guided by the…

Computer Vision and Pattern Recognition · Computer Science 2019-02-05 Anna Khoreva , Federico Perazzi , Rodrigo Benenson , Bernt Schiele , Alexander Sorkine-Hornung

Bounding box supervision has gained considerable attention in weakly supervised 3D instance segmentation. While this approach alleviates the need for extensive point-level annotations, obtaining accurate bounding boxes in practical…

Computer Vision and Pattern Recognition · Computer Science 2025-05-23 Qian Deng , Le Hui , Jin Xie , Jian Yang

Accurate prediction of 3D semantic occupancy from 2D visual images is vital in enabling autonomous agents to comprehend their surroundings for planning and navigation. State-of-the-art methods typically employ fully supervised approaches,…

Computer Vision and Pattern Recognition · Computer Science 2025-01-10 Duc-Hai Pham , Duc-Dung Nguyen , Anh Pham , Tuan Ho , Phong Nguyen , Khoi Nguyen , Rang Nguyen

Instance segmentation is an active topic in computer vision that is usually solved by using supervised learning approaches over very large datasets composed of object level masks. Obtaining such a dataset for any new domain can be very…

Computer Vision and Pattern Recognition · Computer Science 2021-04-06 Zhenzhen Weng , Mehmet Giray Ogut , Shai Limonchik , Serena Yeung

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

Active learning generally involves querying the most representative samples for human labeling, which has been widely studied in many fields such as image classification and object detection. However, its potential has not been explored in…

Computer Vision and Pattern Recognition · Computer Science 2020-12-10 Jun Wang , Shaoguo Wen , Kaixing Chen , Jianghua Yu , Xin Zhou , Peng Gao , Changsheng Li , Guotong Xie
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