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Deep predictive models rely on human supervision in the form of labeled training data. Obtaining large amounts of annotated training data can be expensive and time consuming, and this becomes a critical bottleneck while building such models…

Machine Learning · Statistics 2020-10-01 Bindya Venkatesh , Jayaraman J. Thiagarajan

Manually annotating 3D point clouds is laborious and costly, limiting the training data preparation for deep learning in real-world object detection. While a few previous studies tried to automatically generate 3D bounding boxes from weak…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Chang Liu , Xiaoyan Qian , Xiaojuan Qi , Edmund Y. Lam , Siew-Chong Tan , Ngai Wong

Active learning (AL) is a learning paradigm where an active learner has to train a model (e.g., a classifier) which is in principal trained in a supervised way, but in AL it has to be done by means of a data set with initially unlabeled…

Machine Learning · Computer Science 2015-12-23 Adrian Calma , Tobias Reitmaier , Bernhard Sick , Paul Lukowicz , Mark Embrechts

Active learning (AL) algorithms may achieve better performance with fewer data because the model guides the data selection process. While many algorithms have been proposed, there is little study on what the optimal AL algorithm looks like,…

Machine Learning · Computer Science 2021-02-23 Yilun Zhou , Adithya Renduchintala , Xian Li , Sida Wang , Yashar Mehdad , Asish Ghoshal

The multi-line LiDAR is widely used in autonomous vehicles, so point cloud-based 3D detectors are essential for autonomous driving. Extracting rich multi-scale features is crucial for point cloud-based 3D detectors in autonomous driving due…

Computer Vision and Pattern Recognition · Computer Science 2024-11-14 Xusheng Li , Chengliang Wang , Shumao Wang , Zhuo Zeng , Ji Liu

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

Machine learning models are increasingly being utilized across various fields and tasks due to their outstanding performance and strong generalization capabilities. Nonetheless, their success hinges on the availability of large volumes of…

Machine Learning · Computer Science 2024-11-26 Shreen Gul , Mohamed Elmahallawy , Sanjay Madria , Ardhendu Tripathy

We address the problem of real-time 3D object detection from point clouds in the context of autonomous driving. Computation speed is critical as detection is a necessary component for safety. Existing approaches are, however, expensive in…

Computer Vision and Pattern Recognition · Computer Science 2019-03-05 Bin Yang , Wenjie Luo , Raquel Urtasun

We propose a real-time dynamic LiDAR odometry pipeline for mobile robots in Urban Search and Rescue (USAR) scenarios. Existing approaches to dynamic object detection often rely on pretrained learned networks or computationally expensive…

Robotics · Computer Science 2024-11-28 Jonathan Lichtenfeld , Kevin Daun , Oskar von Stryk

3D object detection is a core perceptual challenge for robotics and autonomous driving. However, the class-taxonomies in modern autonomous driving datasets are significantly smaller than many influential 2D detection datasets. In this work,…

Computer Vision and Pattern Recognition · Computer Science 2020-08-25 Benjamin Wilson , Zsolt Kira , James Hays

Using deep learning, we now have the ability to create exceptionally good semantic segmentation systems; however, collecting the prerequisite pixel-wise annotations for training images remains expensive and time-consuming. Therefore, it…

Computer Vision and Pattern Recognition · Computer Science 2022-10-19 Aneesh Rangnekar , Christopher Kanan , Matthew Hoffman

Given a limited labeling budget, active learning (AL) aims to sample the most informative instances from an unlabeled pool to acquire labels for subsequent model training. To achieve this, AL typically measures the informativeness of…

Machine Learning · Computer Science 2023-07-07 Cheng Chen , Yong Wang , Lizi Liao , Yueguo Chen , Xiaoyong Du

Dense regression is a widely used approach in computer vision for tasks such as image super-resolution, enhancement, depth estimation, etc. However, the high cost of annotation and labeling makes it challenging to achieve accurate results.…

Computer Vision and Pattern Recognition · Computer Science 2023-05-30 Vikrant Rangnekar , Uddeshya Upadhyay , Zeynep Akata , Biplab Banerjee

Curating an informative and representative dataset is essential for enhancing the performance of 2D object detectors. We present a novel active learning sampling strategy that addresses both the informativeness and diversity of the…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Aral Hekimoglu , Adrian Brucker , Alper Kagan Kayali , Michael Schmidt , Alvaro Marcos-Ramiro

The image annotation stage is a critical and often the most time-consuming part required for training and evaluating object detection and semantic segmentation models. Deployment of the existing models in novel environments often requires…

Computer Vision and Pattern Recognition · Computer Science 2023-11-21 Yimeng Li , Navid Rajabi , Sulabh Shrestha , Md Alimoor Reza , Jana Kosecka

Active learning (AL) aims to enhance model performance by selectively collecting highly informative data, thereby minimizing annotation costs. However, in practical scenarios, unlabeled data may contain out-of-distribution (OOD) samples,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Jaehyuk Heo , Pilsung Kang

Labeling data can be an expensive task as it is usually performed manually by domain experts. This is cumbersome for deep learning, as it is dependent on large labeled datasets. Active learning (AL) is a paradigm that aims to reduce…

Computation and Language · Computer Science 2021-11-05 Pieter Floris Jacobs , Gideon Maillette de Buy Wenniger , Marco Wiering , Lambert Schomaker

In machine learning, the term active learning regroups techniques that aim at selecting the most useful data to label from a large pool of unlabelled examples. While supervised deep learning techniques have shown to be increasingly…

Computer Vision and Pattern Recognition · Computer Science 2021-01-08 Alex Goupilleau , Tugdual Ceillier , Marie-Caroline Corbineau

We propose a fully automatic annotation scheme that takes a raw 3D point cloud with a set of fitted CAD models as input and outputs convincing point-wise labels that can be used as cheap training data for point cloud segmentation. Compared…

Computer Vision and Pattern Recognition · Computer Science 2023-07-26 Galadrielle Humblot-Renaux , Simon Buus Jensen , Andreas Møgelmose

Roadside perception datasets are typically constructed via cooperative labeling between synchronized vehicle and roadside frame pairs. However, real deployment often requires annotation of roadside-only data due to hardware and privacy…

Computer Vision and Pattern Recognition · Computer Science 2026-01-06 Ruiyu Mao , Baoming Zhang , Nicholas Ruozzi , Yunhui Guo