← Search

Nathaniel Merrill

8 accepted papers

2023

Incremental Dense Reconstruction From Monocular Video With Guided Sparse Feature Volume Fusion

RA-L 2023

Incrementally recovering 3D dense structures from monocular videos is of paramount importance since it enables various robotics and AR applications. Feature volumes have recently been shown to enable efficient and accurate incremental dense reconstruction without the need to first estimate depth, bu

Cited by 12SourceScholar
2022

Symmetry and Uncertainty-Aware Object SLAM for 6DoF Object Pose Estimation

CVPR 2022poster

We propose a keypoint-based object-level SLAM framework that can provide globally consistent 6DoF pose estimates for symmetric and asymmetric objects alike. To the best of our knowledge, our system is among the first to utilize the camera pose information from SLAM to provide prior knowledge for tra…

Cited by 51PDFcodeScholar
2021

CodeVIO: Visual-Inertial Odometry with Learned Optimizable Dense Depth

ICRA 2021poster

In this work, we present a lightweight, tightly-coupled deep depth network and visual-inertial odometry (VIO) system, which can provide accurate state estimates and dense depth maps of the immediate surroundings. Leveraging the proposed lightweight Conditional Variational Autoencoder (CVAE) for dept…

Cited by 52SourceScholar
2021

Robust Monocular Visual-Inertial Depth Completion for Embedded Systems

ICRA 2021poster

In this work we augment our prior state-of-the-art visual-inertial odometry (VIO) system, OpenVINS [1], to produce accurate dense depth by filling in sparse depth estimates (depth completion) from VIO with image guidance – all while focusing on enabling real-time performance of the full VIO+depth sy…

Cited by 18SourceScholar
2020

Schmidt-EKF-based Visual-Inertial Moving Object Tracking

ICRA 2020poster

In this paper we investigate the effect of tightly-coupled estimation on the performance of visual-inertial localization and dynamic object pose tracking. In particular, we show that while a joint estimation system outperforms its decoupled counterpart when given a "proper" model for the target's mo…

Cited by 15SourceScholar
2020

Versatile 3D Multi-Sensor Fusion for Lightweight 2D Localization

IROS 2020poster

Aiming for a lightweight and robust localization solution for low-cost, low-power autonomous robot platforms, such as educational or industrial ground vehicles, under challenging conditions (e.g., poor sensor calibration, low lighting and dynamic objects), we propose a two-stage localization system…

Cited by 11SourceScholar
2019

CALC2.0: Combining Appearance, Semantic and Geometric Information for Robust and Efficient Visual Loop Closure

IROS 2019poster

Traditional attempts for loop closure detection typically use hand-crafted features, relying on geometric and visual information only, whereas more modern approaches tend to use semantic, appearance or geometric features extracted from deep convolutional neural networks (CNNs). While these approache…

Cited by 43SourcecodeScholar