Ola Ringdahl

Senior research engineer at Department of Computing Science

ola.ringdahl@umu.se

+46 90 786 57 22

Plan 2, MIT-huset, C241 Umeå universitet, 901 87 Umeå

Senior lecturer (associate professor) at Department of Computing Science

ola.ringdahl@umu.se

+46 90 786 57 22

Plan 2, MIT-huset, C241 Umeå universitet, 901 87 Umeå

Latest publications

2019

Detection and classification of Root and Butt-Rot (RBR) in Stumps of Norway Spruce Using RGB Images and Machine Learning

Sensors, MDPI 2019, Vol. 19, (7)

Ostovar, Ahmad; Talbot, Bruce; Puliti, Stefano; et al.

2019

Evaluation of approach strategies for harvesting robots: Case study of sweet pepper harvesting

Journal of Intelligent and Robotic Systems, Springer Netherlands 2019, Vol. 95, (1) : 149-164

Ringdahl, Ola; Kurtser, Polina; Edan, Yael

2019

Using RGB images and machine learning to detect and classify Root and Butt-Rot (RBR) in stumps of Norway spruce

Forest Operations in Response to Environmental Challenges

Ringdahl, Ola; Ostovar, Ahmad; Talbot, Bruce; et al.

2018

Adaptive Image Thresholding of Yellow Peppers for a Harvesting Robot

Robotics, MDPI 2018, Vol. 7, (1)

Ostovar, Ahmad; Ringdahl, Ola; Hellström, Thomas

2017

Strategies for selecting best approach direction for a sweet-pepper harvesting robot

Towards Autonomous Robotic Systems: 18th Annual Conference, TAROS 2017, Guildford, UK, July 19–21, 2017, Proceedings, Cham: Springer 2017 : 516-525

Ringdahl, Ola; Kurtser, Polina; Edan, Yael

2016

Human Detection Based on Infrared Images in Forestry Environments

Image Analysis and Recognition (ICIAR 2016): 13th International Conference, ICIAR 2016, in Memory of Mohamed Kamel, Póvoa de Varzim, Portugal, July 13-15, 2016, Proceedings : 175-182

Ostovar, Ahmad; Hellström, Thomas; Ringdahl, Ola

2016

Operational flow of an autonomous sweetpepper harvesting robot

The 5th Israeli Conference on Robotics 2016, 13-14 April 2016, Air Force Conference Center Hertzilya, Israel

Ringdahl, Ola; Kurtser, Polina; Barth, Ruud; et al.

2015

CROPS: Clever Robots for Crops

Engineering & Technology Reference, Vol. 1, (1)

Bontsema, Jan; Hemming, Jochen; Pekkeriet, Erik; et al.

2015

Estimating the position of the harvester head: a key step towards the precision forestry of the future?

Croatian Journal of Forest Engineering, Zagreb, Croatia: Croatian Journal of Forest Engineering 2015, Vol. 36, (2) : 147-164

Lindroos, Ola; Ringdahl, Ola; Pedro, La Hera; et al.

2014

CROPS: high tech agricultural robots

The European Society of Agricultural Engineers 2014

Bontsema, J.; Hemming, J.; Pekkeriet, E.; et al.

2014

Using ROS for agricultural robotics: design considerations and experiences

RHEA-2014 : 509-518

Barth, Ruud; Baur, Jörg; Buschmann, Thomas; et al.

2013

A software framework for agricultural and forestry robots

Industrial robot, Emerald Group Publishing Limited 2013, Vol. 40, (1) : 20-26

Hellström, Thomas; Ringdahl, Ola

2013

Enhanced Algorithms for Estimating Tree Trunk Diameter Using 2D Laser Scanner

Remote Sensing, Basel: MDPI 2013, Vol. 5, (10) : 4839-4856

Ringdahl, Ola; Hohnloser, Peter; Hellström, Thomas; et al.

2012

A software framework for agricultural and forestry robotics

Proceedings of the ﬁrst International Conference on Robotics and associated High-technologies and Equipment for agriculture: Applications of automated systems and robotics for crop protection in sustainable precision agriculture, Pisa: Pisa University Press 2012 : 171-176

Hellström, Thomas; Ringdahl, Ola

2012

Estimating wheel slip for a forest machine using RTK-DGPS

Journal of terramechanics, Vol. 49, (5) : 271-279

Ringdahl, Ola; Hellström, Thomas; Wästerlund, Iwan; et al.

2012

Potentials of possible machine systems for directly loading logs in cut-to-length harvesting

Canadian Journal of Forest Research, Canadian Science Publishing 2012, Vol. 42, (5) : 970-985

Ringdahl, Ola; Hellström, Thomas; Lindroos, Ola

2012

Tree diameter estimation using laser scanner

Report / UMINF, 12.20

Hellström, Thomas; Hohnloser, Peter; Ringdahl, Ola

2011

Automation in forestry: development of unmanned forwarders

Report / UMINF, 11.03

Ringdahl, Ola

2011

Path tracking in forest terrain by an autonomous forwarder

Scandinavian Journal of Forest Research, Taylor & Francis 2011, Vol. 26, (4) : 350-359

Ringdahl, Ola; Lindroos, Ola; Hellström, Thomas; et al.

2010

Path tracking for autonomous forwarders in forest terrain

Precision Forestry Symposium: developments in Precision Forestry since 2006 : 42-43

Athanassiadis, Dimitris; Bergström, Dan; Hellström, Thomas; et al.

2009

Autonomous forest vehicles: historic, envisioned, and state-of-the-art

International Journal of Forest Engineering, Vol. 20, (1) : 33-38

Hellström, Thomas; Lärkeryd, Per; Nordfjell, Tomas; et al.

2009

Real-time path planning using a simulator-in-the-loop

International Journal Vehicle Autonomous Systems, Inderscience 2009, Vol. 7, (1/2) : 56-72

Hellström, Thomas; Ringdahl, Ola

2008

A Java-based middleware for control and sensing in mobile robotics

International Conference on Intelligent Automation and Robotics 2008 : 649-654

Hellström, Thomas; Johansson, Thomas; Ringdahl, Ola

2008

A simulator driven path planner for autonomous off-road vehicles – initial results

Proceedings of the Israel Conference on Robotics (ICR08)

Hellström, Thomas; Ringdahl, Ola

2008

Autonomous forest machines: Past present and future

Report / UMINF, 08.06

Hellström, Thomas; Lärkeryd, Pär; Nordfjell, Thomas; et al.

2008

Autonomous Forest Machines: Techniques and Algorithms for Unmanned Vehicles

VDM Verlag Dr. Müller Aktiengesellschaft & Co. KG 2008

Ringdahl, Ola; Hellström, Thomas

2008

Path planning for off-road vehicles with a simulator-in-the-loop

Report / UMINF, 08.07

Hellström, Thomas; Ringdahl, Ola

2007

A Software Framework for Control and Sensing in Mobile Robotics

Report / UMINF, 07.05

Hellström, Thomas; Johansson, Thomas; Ringdahl, Ola

2007

Techniques and Algorithms for Autonomous Vehicles in Forest Environment

Report / UMINF, 07.17

Ringdahl, Ola

2006

Autonomous Navigation in Forest Environment

Proceedings from the 23rd Anual workshop of the Swedish Artificial Intelligence Society (SAIS06), : -

Ringdahl, Ola; Hellström, Thomas

2006

Development of an Autonomous Forest Machine for Path Tracking

Field and Service Robotics: Results of the 5th International Conference, New York: Springer 2006 : 603-614

Hellström, Thomas; Johansson, Thomas; Ringdahl, Ola

2006

Follow the Past: a Path Tracking Algorithm for Autonomous Vehicles

International Journal of Vehicle Autonomous Systems, Inderscience 2006, Vol. 4, (2/3/4) : 216-224

Hellström, Thomas; Ringdahl, Ola

2006

Path tracking and localization techniques for forest environment.

Proceedings of the Israel Conference on Robotics (ICR06)

Hellström, Thomas; Ringdahl, Ola; Siddiqui, Arsalan

2005

Autonomous Path Tracking Using Recorded Orientation and Steering Commands

Proceedings of Towards Autonomous Robotic Systems 2005 (TAROS05)

Hellström, Thomas; Ringdahl, Ola

2005

Development of an Autonomous Path Tracking Forest Machine: a status report

Report / UMINF, 05.08

Georgsson, Fredrik; Hellström, Thomas; Johansson, Thomas; et al.

2005

Follow the Past - A Path Tracking Method Using Recorded Orientation and Steering Commands.

Proceedings of The Third Swedish Workshop on Autonomous Robotics (SWAR05) : -

Ringdahl, Ola; Hellström, Thomas

2004

Follow The Past: a Path Tracking Algorithm for Autonomous Forest Vehicles

Report / UMINF, 11

Hellström, Thomas; Ringdahl, Ola

2003

Path Tracking and Obstacle Avoidance for Forest Machines

UMNAD, 454/03

Ringdahl, Ola

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Ola Ringdahl

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