Search Results for author: Kostas Alexis

Found 10 papers, 2 papers with code

RMS: Redundancy-Minimizing Point Cloud Sampling for Real-Time Pose Estimation

1 code implementation12 Dec 2023 Pavel Petracek, Kostas Alexis, Martin Saska

The typical point cloud sampling methods used in state estimation for mobile robots preserve a high level of point redundancy.

Motion Estimation Pose Estimation

Task-driven Compression for Collision Encoding based on Depth Images

no code implementations11 Sep 2023 Mihir Kulkarni, Kostas Alexis

This paper contributes a novel learning-based method for aggressive task-driven compression of depth images and their encoding as images tailored to collision prediction for robotic systems.

Visual-Thermal Camera Dataset Release and Multi-Modal Alignment without Calibration Information

no code implementations29 Dec 2020 Frank Mascarich, Kostas Alexis

This report accompanies a dataset release on visual and thermal camera data and details a procedure followed to align such multi-modal camera frames in order to provide pixel-level correspondence between the two without using intrinsic or extrinsic calibration information.

Anomalous Motion Detection on Highway Using Deep Learning

1 code implementation15 Jun 2020 Harpreet Singh, Emily M. Hand, Kostas Alexis

The advent of self-driving cars provides an opportunity to apply visual anomaly detection in a more dynamic application yet no dataset exists in this type of environment.

Anomaly Detection Motion Detection +1

Are State-of-the-art Visual Place Recognition Techniques any Good for Aerial Robotics?

no code implementations16 Apr 2019 Mubariz Zaffar, Ahmad Khaliq, Shoaib Ehsan, Michael Milford, Kostas Alexis, Klaus McDonald-Maier

Visual Place Recognition (VPR) has seen significant advances at the frontiers of matching performance and computational superiority over the past few years.

Visual Place Recognition

Vision-Depth Landmarks and Inertial Fusion for Navigation in Degraded Visual Environments

no code implementations5 Mar 2019 Shehryar Khattak, Christos Papachristos, Kostas Alexis

This paper proposes a method for tight fusion of visual, depth and inertial data in order to extend robotic capabilities for navigation in GPS-denied, poorly illuminated, and texture-less environments.

Keyframe-based Direct Thermal-Inertial Odometry

no code implementations3 Mar 2019 Shehryar Khattak, Christos Papachristos, Kostas Alexis

This paper proposes an approach for fusing direct radiometric data from a thermal camera with inertial measurements to extend the robotic capabilities of aerial robots for navigation in GPS-denied and visually degraded environments in the conditions of darkness and in the presence of airborne obscurants such as dust, fog and smoke.

Marker based Thermal-Inertial Localization for Aerial Robots in Obscurant Filled Environments

no code implementations2 Mar 2019 Shehryar Khattak, Christos Papachristos, Kostas Alexis

For robotic inspection tasks in known environments fiducial markers provide a reliable and low-cost solution for robot localization.

Navigate Pose Estimation

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