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Lucas Nunes

17 accepted papers

2026

Vision-Based Panoptic Occupancy Prediction in Urban Environments

ICRA 2026poster

Abstract— Understanding the surrounding scene geometrically and semantically is a key requirement for autonomously navigating systems. Vision-based 3D panoptic occupancy prediction aims to provide a 3D representation of the surroundingsincluding semantic meaning and identifying individual objectssuc…

Cited by 0Scholar
2025

SfmOcc: Vision-Based 3D Semantic Occupancy Prediction in Urban Environments

RA-L 2025

Semantic scene understanding is crucial for autonomous systems and 3D semantic occupancy prediction is a key task since it provides geometric and possibly semantic information of the vehicle's surroundings. Most existing vision-based approaches to occupancy estimation rely on 3D voxel labels or segm

Cited by 7SourceScholar
2025

Tree Skeletonization from 3D Point Clouds by Denoising Diffusion

ICCV 2025poster

The natural world presents complex organic structures, such as tree canopies, that humans can interpret even when only partially visible.Understanding tree structures is key for forest monitoring, orchard management, and automated harvesting applications.However, reconstructing tree topologies from…

2025

Zero-Shot Semantic Segmentation for Robots in Agriculture

IROS 2025

Conventional crop production, which is essential for providing food, feed, fuel, and fiber for our society, relies heavily on harmful herbicides to control weeds. Instead, agricultural robots could remove weeds more sustainably. However, these robots require a generalizable perception system that ca

Cited by 3SourceScholar
2024

Joint Intrinsic and Extrinsic Calibration of Perception Systems Utilizing a Calibration Environment

RA-L 2024

Basically all multi-sensor systems must calibrate their sensors to exploit their full potential for state estimation such as mapping and localization. In this letter, we investigate the problem of extrinsic and intrinsic calibration of perception systems. Traditionally, targets in the form of checke

Cited by 6SourceScholar
2024

Open-World Semantic Segmentation Including Class Similarity

CVPR 2024poster

Interpreting camera data is key for autonomously acting systems such as autonomous vehicles. Vision systems that operate in real-world environments must be able to understand their surroundings and need the ability to deal with novel situations. This paper tackles open-world semantic segmentation i.…

2024

Scaling Diffusion Models to Real-World 3D LiDAR Scene Completion

CVPR 2024poster

Computer vision techniques play a central role in the perception stack of autonomous vehicles. Such methods are employed to perceive the vehicle surroundings given sensor data. 3D LiDAR sensors are commonly used to collect sparse 3D point clouds from the scene. However compared to human perception s…

2023

ERASOR2: Instance-Aware Robust 3D Mapping of the Static World in Dynamic Scenes

RSS 2023poster

A map of the environment is an essential component for robotic navigation. In the majority of cases, a map of the static part of the world is the basis for localization, planning, and navigation. However, dynamic objects that are presented in the scenes during mapping leave undesirable traces in the…

2023

KPPR: Exploiting Momentum Contrast for Point Cloud-Based Place Recognition

RA-L 2023

Place recognition plays an important role in robot localization and SLAM. Being able to retrieve the current position in a given map allows, for instance, localizing without relying on GPS reception. In this letter, we address the problem of point cloud-based place recognition, we especially focus o

Cited by 14SourceScholar
2023

Mask-Based Panoptic LiDAR Segmentation for Autonomous Driving

RA-L 2023

Autonomous vehicles need to understand their surroundings geometrically and semantically to plan and act appropriately in the real world. Panoptic segmentation of LiDAR scans provides a description of the surroundings by unifying semantic and instance segmentation. It is usually solved in a bottom-u

Cited by 66SourceScholar
2023

Mask4D: End-to-End Mask-Based 4D Panoptic Segmentation for LiDAR Sequences

RA-L 2023

Scene understanding is crucial for autonomous systems to reliably navigate in the real world. Panoptic segmentation of 3D LiDAR scans allows us to semantically describe a vehicle's environment by predicting semantic classes for each 3D point and to identify individual instances through different ins

Cited by 21SourceScholar
2023

Temporal Consistent 3D LiDAR Representation Learning for Semantic Perception in Autonomous Driving

CVPR 2023poster

Semantic perception is a core building block in autonomous driving, since it provides information about the drivable space and location of other traffic participants. For learning-based perception, often a large amount of diverse training data is necessary to achieve high performance. Data labeling…

2022

Automatic Labeling to Generate Training Data for Online LiDAR-Based Moving Object Segmentation

RA-L 2022

Understanding the scene is key for autonomously navigating vehicles, and the ability to segment the surroundings online into moving and non-moving objects is a central ingredient of this task. Often, deep learning-based methods are used to perform moving object segmentation (MOS). The performance of

Cited by 95SourceScholar
2022

Contrastive Instance Association for 4D Panoptic Segmentation Using Sequences of 3D LiDAR Scans

RA-L 2022

Scene understanding is critical for autonomous navigation in dynamic environments. Perception tasks in this domain like segmentation and tracking are usually tackled individually. In this letter, we address the problem of 4D panoptic segmentation using LiDAR scans, which requires to assign to each 3

Cited by 22SourcecodeScholar
2022

Receding Moving Object Segmentation in 3D LiDAR Data Using Sparse 4D Convolutions

RA-L 2022

A key challenge for autonomous vehicles is to navigate in unseen dynamic environments. Separating moving objects from static ones is essential for navigation, pose estimation, and understanding how other traffic participants are likely to move in the near future. In this work, we tackle the problem

Cited by 105SourcecodeScholar
2022

SegContrast: 3D Point Cloud Feature Representation Learning Through Self-Supervised Segment Discrimination

RA-L 2022

Semantic scene interpretation is essential for autonomous systems to operate in complex scenarios. While deep learning-based methods excel at this task, they rely on vast amounts of labeled data that is tedious to generate and might not cover all relevant classes sufficiently. Self-supervised repres

Cited by 92SourceScholar
2022

Unsupervised Class-Agnostic Instance Segmentation of 3D LiDAR Data for Autonomous Vehicles

RA-L 2022

Fine-grained scene understanding is essential for autonomous driving. The context around a vehicle can change drastically while navigating, making it hard to identify and understand the different objects that may appear. Although recent efforts on semantic and panoptic segmentation pushed the field

Cited by 26SourceScholar