Search Results for author: Tor Arne Johansen

Found 11 papers, 3 papers with code

Deep Learning for In-Orbit Cloud Segmentation and Classification in Hyperspectral Satellite Data

no code implementations13 Mar 2024 Daniel Kovac, Jan Mucha, Jon Alvarez Justo, Jiri Mekyska, Zoltan Galaz, Krystof Novotny, Radoslav Pitonak, Jan Knezik, Jonas Herec, Tor Arne Johansen

The performance of the latest 1D CNN (1D-Justo-LiuNet) and two recent 2D CNNs (nnU-net and 2D-Justo-UNet-Simple) for cloud segmentation and classification is assessed.

Cloud Detection Computational Efficiency

Distributed MPC for autonomous ships on inland waterways with collaborative collision avoidance

no code implementations1 Mar 2024 Hoang Anh Tran, Tor Arne Johansen, Rudy R. Negenborn

Furthermore, the proposed algorithm can safely deviate from traffic rules when necessary to increase efficiency in complex scenarios.

Collision Avoidance Model Predictive Control

Quick unsupervised hyperspectral dimensionality reduction for earth observation: a comparison

no code implementations26 Feb 2024 Daniela Lupu, Joseph L. Garrett, Tor Arne Johansen, Milica Orlandic, Ion Necoara

Dimensionality reduction can be applied to hyperspectral images so that the most useful data can be extracted and processed more quickly.

Dimensionality Reduction Earth Observation

A Comparative Study of Compressive Sensing Algorithms for Hyperspectral Imaging Reconstruction

no code implementations26 Jan 2024 Jon Alvarez Justo, Daniela Lupu, Milica Orlandic, Ion Necoara, Tor Arne Johansen

Hyperspectral Imaging comprises excessive data consequently leading to significant challenges for data processing, storage and transmission.

Compressive Sensing

The Syncline Model -- Analyzing the Impact of Time Synchronization in Sensor Fusion

no code implementations2 Sep 2022 Erling Rennemo Jellum, Torleiv Håland Bryne, Tor Arne Johansen, Milica Orlandíc

The accuracy of sensor fusion algorithms are limited by either the intrinsic sensor noise, or by the quality of time synchronization of the sensors.

Sensor Fusion

Data-Efficient Deep Reinforcement Learning for Attitude Control of Fixed-Wing UAVs: Field Experiments

1 code implementation7 Nov 2021 Eivind Bøhn, Erlend M. Coates, Dirk Reinhardt, Tor Arne Johansen

Attitude control of fixed-wing unmanned aerial vehicles (UAVs) is a difficult control problem in part due to uncertain nonlinear dynamics, actuator constraints, and coupled longitudinal and lateral motions.

Reinforcement Learning (RL)

Optimization of the Model Predictive Control Meta-Parameters Through Reinforcement Learning

no code implementations7 Nov 2021 Eivind Bøhn, Sebastien Gros, Signe Moe, Tor Arne Johansen

Its high computational complexity results in high power consumption from the control algorithm, which could account for a significant share of the energy resources in battery-powered embedded systems.

Model Predictive Control reinforcement-learning +1

Reinforcement Learning of the Prediction Horizon in Model Predictive Control

no code implementations22 Feb 2021 Eivind Bøhn, Sebastien Gros, Signe Moe, Tor Arne Johansen

Model predictive control (MPC) is a powerful trajectory optimization control technique capable of controlling complex nonlinear systems while respecting system constraints and ensuring safe operation.

Model Predictive Control reinforcement-learning +1

Optimization of the Model Predictive Control Update Interval Using Reinforcement Learning

1 code implementation26 Nov 2020 Eivind Bøhn, Sebastien Gros, Signe Moe, Tor Arne Johansen

In control applications there is often a compromise that needs to be made with regards to the complexity and performance of the controller and the computational resources that are available.

Model Predictive Control reinforcement-learning +1

Accelerating Reinforcement Learning with Suboptimal Guidance

no code implementations21 Nov 2019 Eivind Bøhn, Signe Moe, Tor Arne Johansen

Reinforcement Learning in domains with sparse rewards is a difficult problem, and a large part of the training process is often spent searching the state space in a more or less random fashion for any learning signals.

OpenAI Gym reinforcement-learning +1

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