Works by Hakala, Teemu

Results: 45

Integration of a Mobile Laser Scanning System with a Forest Harvester for Accurate Localization and Tree Stem Measurements.

Published in:

Remote Sensing, 2024, v. 16, n. 17, p. 3292, doi. 10.3390/rs16173292

By:

Faitli, Tamás;
Hyyppä, Eric;
Hyyti, Heikki;
Hakala, Teemu;
Kaartinen, Harri;
Kukko, Antero;
Muhojoki, Jesse;
Hyyppä, Juha

Publication type:

Article

Benchmarking Under- and Above-Canopy Laser Scanning Solutions for Deriving Stem Curve and Volume in Easy and Difficult Boreal Forest Conditions.

Published in:

Remote Sensing, 2024, v. 16, n. 10, p. 1721, doi. 10.3390/rs16101721

By:

Muhojoki, Jesse;
Tavi, Daniella;
Hyyppä, Eric;
Lehtomäki, Matti;
Faitli, Tamás;
Kaartinen, Harri;
Kukko, Antero;
Hakala, Teemu;
Hyyppä, Juha

Publication type:

Article

Comparison of Deep Neural Networks in the Classification of Bark Beetle-Induced Spruce Damage Using UAS Images †.

Published in:

Remote Sensing, 2023, v. 15, n. 20, p. 4928, doi. 10.3390/rs15204928

By:

Turkulainen, Emma;
Honkavaara, Eija;
Näsi, Roope;
Oliveira, Raquel A.;
Hakala, Teemu;
Junttila, Samuli;
Karila, Kirsi;
Koivumäki, Niko;
Pelto-Arvo, Mikko;
Tuviala, Johanna;
Östersund, Madeleine;
Pölönen, Ilkka;
Lyytikäinen-Saarenmaa, Päivi

Publication type:

Article

Investigating Foliar Macro- and Micronutrient Variation with Chlorophyll Fluorescence and Reflectance Measurements at the Leaf and Canopy Scales in Potato.

Published in:

Remote Sensing, 2023, v. 15, n. 10, p. 2498, doi. 10.3390/rs15102498

By:

Oivukkamäki, Jaakko;
Atherton, Jon;
Xu, Shan;
Riikonen, Anu;
Zhang, Chao;
Hakala, Teemu;
Honkavaara, Eija;
Porcar-Castell, Albert

Publication type:

Article

Evaluating Factors Impacting Fallen Tree Detection from Airborne Laser Scanning Point Clouds.

Published in:

Remote Sensing, 2023, v. 15, n. 2, p. 382, doi. 10.3390/rs15020382

By:

Heinaro, Einari;
Tanhuanpää, Topi;
Vastaranta, Mikko;
Yrttimaa, Tuomas;
Kukko, Antero;
Hakala, Teemu;
Mattsson, Teppo;
Holopainen, Markus

Publication type:

Article

The Penetration Analysis of Airborne Ku-Band Radar Versus Satellite Infrared Lidar Based on the Height and Energy Percentiles in the Boreal Forest.

Published in:

Remote Sensing, 2021, v. 13, n. 9, p. 1650, doi. 10.3390/rs13091650

By:

Zhou, Hui;
Chen, Yuwei;
Hakala, Teemu;
Feng, Ziyi;
Jiang, Changhui;
Jia, Jianxin;
Sun, Haibin;
Hyyppä, Juha;
Ramos, Isaac

Publication type:

Article

Using Microwave Profile Radar to Estimate Forest Canopy Leaf Area Index: Linking 3D Radiative Transfer Model and Forest Gap Model.

Published in:

Remote Sensing, 2021, v. 13, n. 2, p. 297, doi. 10.3390/rs13020297

By:

Du, Kai;
Huang, Huaguo;
Feng, Ziyi;
Hakala, Teemu;
Chen, Yuwei;
Hyyppä, Juha

Publication type:

Article

Comparison of Backpack, Handheld, Under-Canopy UAV, and Above-Canopy UAV Laser Scanning for Field Reference Data Collection in Boreal Forests.

Published in:

Remote Sensing, 2020, v. 12, n. 20, p. 3327, doi. 10.3390/rs12203327

By:

Hyyppä, Eric;
Yu, Xiaowei;
Kaartinen, Harri;
Hakala, Teemu;
Kukko, Antero;
Vastaranta, Mikko;
Hyyppä, Juha

Publication type:

Article

Erratum: Du, K., et al. Simulation of Ku-Band Profile Radar Waveform by Extending Radiosity Applicable to Porous Individual Objects (RAPID2) Model. Remote Sensing 2020, 12, 684.

Published in:

2020

By:

Du, Kai;
Huang, Huaguo;
Zhu, Yuyi;
Feng, Ziyi;
Hakala, Teemu;
Chen, Yuwei;
Hyyppä, Juha

Publication type:

Correction Notice

The Determination of Effective Beamwidth of Ku Band Profiling Radar Based on Waveform Matching Method in the Boreal Forest of Finland.

Published in:

Remote Sensing, 2020, v. 12, n. 17, p. 2710, doi. 10.3390/rs12172710

By:

Zhou, Hui;
Chen, Yuwei;
Hu, Nan;
Dong, Yuandan;
Xu, Xinmin;
Feng, Ziyi;
Hakala, Teemu;
Hyyppä, Juha

Publication type:

Article

Seamless integration of above- and under-canopy unmanned aerial vehicle laser scanning for forest investigation.

Published in:

Forest Ecosystems (Springer Nature), 2021, v. 8, n. 1, p. 1, doi. 10.1186/s40663-021-00290-3

By:

Wang, Yunsheng;
Kukko, Antero;
Hyyppä, Eric;
Hakala, Teemu;
Pyörälä, Jiri;
Lehtomäki, Matti;
El Issaoui, Aimad;
Yu, Xiaowei;
Kaartinen, Harri;
Liang, Xinlian;
Hyyppä, Juha

Publication type:

Article

A Clustering Framework for Monitoring Circadian Rhythm in Structural Dynamics in Plants From Terrestrial Laser Scanning Time Series.

Published in:

Frontiers in Plant Science, 2019, p. N.PAG, doi. 10.3389/fpls.2019.00486

By:

Puttonen, Eetu;
Lehtomäki, Matti;
Litkey, Paula;
Näsi, Roope;
Feng, Ziyi;
Liang, Xinlian;
Wittke, Samantha;
Pandžić, Miloš;
Hakala, Teemu;
Karjalainen, Mika;
Pfeifer, Norbert

Publication type:

Article

Visual-Inertial Odometry Using High Flying Altitude Drone Datasets †.

Published in:

Drones (2504-446X), 2023, v. 7, n. 1, p. 36, doi. 10.3390/drones7010036

By:

George, Anand;
Koivumäki, Niko;
Hakala, Teemu;
Suomalainen, Juha;
Honkavaara, Eija

Publication type:

Article

Artificial target detection with a hyperspectral LiDAR over 26-h measurement.

Published in:

Optical Engineering, 2015, v. 54, n. 1, p. 1, doi. 10.1117/1.OE.54.1.013105

By:

Puttonen, Eetu;
Hakala, Teemu;
Nevalainen, Olli;
Kaasalainen, Sanna;
Krooks, Anssi;
Karjalainen, Mika;
Anttila, Kati

Publication type:

Article

Comparing field measurements and annotations as training data for UAV-based detection of standing dead trees in coniferous forest.

Published in:

International Journal of Remote Sensing, 2023, v. 44, n. 17, p. 5375, doi. 10.1080/01431161.2023.2248561

By:

Heinaro, Einari;
Tanhuanpää, Topi;
Kukko, Antero;
Hakala, Teemu;
Holopainen, Markus

Publication type:

Article

High-precision estimation of grass quality and quantity using UAS-based VNIR and SWIR hyperspectral cameras and machine learning.

Published in:

Precision Agriculture, 2024, v. 25, n. 1, p. 186, doi. 10.1007/s11119-023-10064-2

By:

Oliveira, Raquel Alves;
Näsi, Roope;
Korhonen, Panu;
Mustonen, Arja;
Niemeläinen, Oiva;
Koivumäki, Niko;
Hakala, Teemu;
Suomalainen, Juha;
Kaivosoja, Jere;
Honkavaara, Eija

Publication type:

Article

Effect of small-scale snow surface roughness on snow albedo and reflectance.

Published in:

Cryosphere Discussions, 2020, p. 1, doi. 10.5194/tc-2020-154

By:

Manninen, Terhikki;
Anttila, Kati;
Jääskeläinen, Emmihenna;
Riihel&#228, Aku;
Peltoniemi, Jouni;
Räisänen, Petri;
Lahtinen, Panu;
Siljamo, Niilo;
Thölix, Laura;
Meinander, Outi;
Kontu, Anna;
Suokanerva, Hanne;
Pirazzini, Roberta;
Suomalainen, Juha;
Hakala, Teemu;
Kaasalainen, Sanna;
Kaartinen, Harri;
Kukko, Antero;
Hautecoeur, Olivier;
Roujean, Jean-Louis

Publication type:

Article

A Novel Machine Learning Method for Estimating Biomass of Grass Swards Using a Photogrammetric Canopy Height Model, Images and Vegetation Indices Captured by a Drone.

Published in:

Agriculture; Basel, 2018, v. 8, n. 5, p. 70, doi. 10.3390/agriculture8050070

By:

Viljanen, Niko;
Honkavaara, Eija;
Näsi, Roope;
Hakala, Teemu;
Niemeläinen, Oiva;
Kaivosoja, Jere

Publication type:

Article

Autonomous robotic drone system for mapping forest interiors.

Published in:

International Archives of the Photogrammetry, Remote Sensing & Spatial Information Sciences, 2024, v. 48, n. 2, p. 167, doi. 10.5194/isprs-archives-XLVIII-2-2024-167-2024

By:

Karjalainen, Väinö;
Koivumäki, Niko;
Hakala, Teemu;
George, Anand;
Muhojoki, Jesse;
Hyyppa, Eric;
Suomalainen, Juha;
Honkavaara, Eija

Publication type:

Article

VARIABILITY OF REMOTE SENSING SPECTRAL INDICES IN BOREAL LAKE BASINS.

Published in:

International Archives of the Photogrammetry, Remote Sensing & Spatial Information Sciences, 2018, v. 42, n. 2, p. 411, doi. 10.5194/isprs-archives-XLII-2-411-2018

By:

Hakala, Taina;
Pölönen, Ilkka;
Honkavaara, Eija;
Näsi, Roope;
Hakala, Teemu;
Lindfors, Antti

Publication type:

Article

UPSCALING OF SOLAR INDUCED CHLOROPHYLL FLUORESCENCE FROM LEAF TO CANOPY USING THE DART MODEL AND A REALISTIC 3D FOREST SCENE.

Published in:

International Archives of the Photogrammetry, Remote Sensing & Spatial Information Sciences, 2017, v. 42, n. 3/W3, p. 107, doi. 10.5194/isprs-archives-XLII-3-W3-107-2017

By:

Weiwei Liu;
Atherton, Jon;
Mõttus, Matti;
MacArthur, Alasdair;
Teemu, Hakala;
Maseyk, Kadmiel;
Robinson, Iain;
Honkavaara, Eija;
Porcar-Castell, Albert

Publication type:

Article

Under-Canopy UAV Laser Scanning Providing Canopy Height and Stem Volume Accurately.

Published in:

Forests (19994907), 2021, v. 12, n. 7, p. 856, doi. 10.3390/f12070856

By:

Hyyppä, Juha;
Yu, Xiaowei;
Hakala, Teemu;
Kaartinen, Harri;
Kukko, Antero;
Hyyti, Heikki;
Muhojoki, Jesse;
Hyyppä, Eric

Publication type:

Article

Characterizing Seedling Stands Using Leaf-Off and Leaf-On Photogrammetric Point Clouds and Hyperspectral Imagery Acquired from Unmanned Aerial Vehicle.

Published in:

Forests (19994907), 2019, v. 10, n. 5, p. 415, doi. 10.3390/f10050415

By:

Imangholiloo, Mohammad;
Holopainen, Markus;
Saarinen, Ninni;
Vastaranta, Mikko;
Hyyppä, Juha;
Markelin, Lauri;
Rosnell, Tomi;
Näsi, Roope;
Hakala, Teemu;
Honkavaara, Eija

Publication type:

Article

SLAM-Aided Stem Mapping for Forest Inventory with Small-Footprint Mobile LiDAR.

Published in:

Forests (19994907), 2015, v. 6, n. 12, p. 4588, doi. 10.3390/f6124390

By:

Jian Tang;
Yuwei Chen;
Kukko, Antero;
Kaartinen, Harri;
Jaakkola, Anttoni;
Khoramshahi, Ehsan;
Hakala, Teemu;
Hyyppä, Juha;
Holopainen, Markus;
Hyyppä, Hannu

Publication type:

Article

Feasibility of Hyperspectral Single Photon Lidar for Robust Autonomous Vehicle Perception.

Published in:

Sensors (14248220), 2022, v. 22, n. 15, p. 5759, doi. 10.3390/s22155759

By:

Taher, Josef;
Hakala, Teemu;
Jaakkola, Anttoni;
Hyyti, Heikki;
Kukko, Antero;
Manninen, Petri;
Maanpää, Jyri;
Hyyppä, Juha

Publication type:

Article

Direct Reflectance Measurements from Drones: Sensor Absolute Radiometric Calibration and System Tests for Forest Reflectance Characterization.

Published in:

Sensors (14248220), 2018, v. 18, n. 5, p. 1417, doi. 10.3390/s18051417

By:

Hakala, Teemu;
Markelin, Lauri;
Honkavaara, Eija;
Scott, Barry;
Theocharous, Theo;
Nevalainen, Olli;
Näsi, Roope;
Suomalainen, Juha;
Viljanen, Niko;
Greenwell, Claire;
Fox, Nigel

Publication type:

Article

A Backpack-Mounted Omnidirectional Camera with Off-the-Shelf Navigation Sensors for Mobile Terrestrial Mapping: Development and Forest Application.

Published in:

Sensors (14248220), 2018, v. 18, n. 3, p. 827, doi. 10.3390/s18030827

By:

Batista Campos, Mariana;
Garcia Tommaselli, Antonio Maria;
Honkavaara, Eija;
dos Santos Prol, Fabricio;
Kaartinen, Harri;
El Issaoui, Aimad;
Hakala, Teemu

Publication type:

Article

Two-channel Hyperspectral LiDAR with a Supercontinuum Laser Source.

Published in:

Sensors (14248220), 2010, v. 10, n. 7, p. 7057, doi. 10.3390/s100707057

By:

Yuwei Chen;
Räikkönen, Esa;
Kaasalainen, Sanna;
Suomalainen, Juha;
Hakala, Teemu;
Hyyppä, Juha;
Ruizhi Chen

Publication type:

Article

Polarised Multiangular Reflectance Measurements Using the Finnish Geodetic Institute Field Goniospectrometer.

Published in:

Sensors (14248220), 2009, v. 9, n. 5, p. 3891, doi. 10.3390/s90503891

By:

Suomalainen, Juha;
Teemu Hakala;
Peltoniemi, Jouni;
Puttonen, Eetu

Publication type:

Article

Effect of small scale surface roughness and snowpack properties on snow albedo.

Published in:

Geophysical Research Abstracts, 2018, v. 20, p. 696

By:

Manninen, Terhikki;
Pirazzini, Roberta;
Peltoniemi, Jouni;
Anttila, Kati;
Lahtinen, Panu;
Siljamo, Niilo;
Thölix, Laura;
Riihelä, Aku;
Kontu, Anna;
Suokanerva, Hanne;
Meinander, Outi;
Suomalainen, Juha;
Hakala, Teemu;
Kaasalainen, Sanna;
Kaartinen, Harri;
Kukko, Antero;
Roujean, Jean-Louis

Publication type:

Article

Effect of small-scale snow surface roughness on snow albedo and reflectance.

Published in:

Cryosphere, 2021, v. 15, n. 2, p. 793, doi. 10.5194/tc-15-793-2021

By:

Manninen, Terhikki;
Anttila, Kati;
Jääskeläinen, Emmihenna;
Riihelä, Aku;
Peltoniemi, Jouni;
Räisänen, Petri;
Lahtinen, Panu;
Siljamo, Niilo;
Thölix, Laura;
Meinander, Outi;
Kontu, Anna;
Suokanerva, Hanne;
Pirazzini, Roberta;
Suomalainen, Juha;
Hakala, Teemu;
Kaasalainen, Sanna;
Kaartinen, Harri;
Kukko, Antero;
Hautecoeur, Olivier;
Roujean, Jean-Louis

Publication type:

Article

A Novel Tilt Correction Technique for Irradiance Sensors and Spectrometers On-Board Unmanned Aerial Vehicles.

Published in:

Remote Sensing, 2018, v. 10, n. 12, p. 2068, doi. 10.3390/rs10122068

By:

Suomalainen, Juha;
Hakala, Teemu;
Alves de Oliveira, Raquel;
Markelin, Lauri;
Viljanen, Niko;
Näsi, Roope;
Honkavaara, Eija

Publication type:

Article

Estimating Biomass and Nitrogen Amount of Barley and Grass Using UAV and Aircraft Based Spectral and Photogrammetric 3D Features.

Published in:

Remote Sensing, 2018, v. 10, n. 7, p. 1082, doi. 10.3390/rs10071082

By:

Näsi, Roope;
Viljanen, Niko;
Kaivosoja, Jere;
Alhonoja, Katja;
Hakala, Teemu;
Markelin, Lauri;
Honkavaara, Eija

Publication type:

Article

Assessment of Classifiers and Remote Sensing Features of Hyperspectral Imagery and Stereo-Photogrammetric Point Clouds for Recognition of Tree Species in a Forest Area of High Species Diversity.

Published in:

Remote Sensing, 2018, v. 10, n. 5, p. 714, doi. 10.3390/rs10050714

By:

Tuominen, Sakari;
Näsi, Roope;
Honkavaara, Eija;
Balazs, Andras;
Hakala, Teemu;
Viljanen, Niko;
Pölönen, Ilkka;
Saari, Heikki;
Ojanen, Harri

Publication type:

Article

The Comparison of Canopy Height Profiles Extracted from Ku-band Profile Radar Waveforms and LiDAR Data.

Published in:

Remote Sensing, 2018, v. 10, n. 5, p. 701, doi. 10.3390/rs10050701

By:

Zhou, Hui;
Chen, Yuwei;
Feng, Ziyi;
Li, Fashuai;
Hyyppä, Juha;
Hakala, Teemu;
Karjalainen, Mika;
Jiang, Changhui;
Pei, Ling

Publication type:

Article

Assessing Biodiversity in Boreal Forests with UAV-Based Photogrammetric Point Clouds and Hyperspectral Imaging.

Published in:

Remote Sensing, 2018, v. 10, n. 2, p. 338, doi. 10.3390/rs10020338

By:

Saarinen, Ninni;
Vastaranta, Mikko;
Näsi, Roope;
Rosnell, Tomi;
Hakala, Teemu;
Honkavaara, Eija;
Wulder, Michael A.;
Luoma, Ville;
Tommaselli, Antonio M. G.;
Imai, Nilton N.;
Ribeiro, Eduardo A. W.;
Guimarães, Raul B.;
Holopainen, Markus;
Hyyppä, Juha

Publication type:

Article

An Analysis of Ku-Band Profiling Radar Observations of Boreal Forest.

Published in:

Remote Sensing, 2017, v. 9, n. 12, p. 1252, doi. 10.3390/rs9121252

By:

Piermattei, Livia;
Hollaus, Markus;
Milenković, Milutin;
Pfeifer, Norbert;
Quast, Raphael;
Yuwei Chen;
Hakala, Teemu;
Karjalainen, Mika;
Hyyppä, Juha;
Wagner, Wolfgang

Publication type:

Article

Individual Tree Detection and Classification with UAV-Based Photogrammetric Point Clouds and Hyperspectral Imaging.

Published in:

Remote Sensing, 2017, v. 9, n. 3, p. 185, doi. 10.3390/rs9030185

By:

Nevalainen, Olli;
Honkavaara, Eija;
Tuominen, Sakari;
Viljanen, Niko;
Hakala, Teemu;
Xiaowei Yu;
Hyyppä, Juha;
Saari, Heikki;
Pölönen, Ilkka;
Imai, Nilton N.;
Tommaselli, Antonio M. G.

Publication type:

Article

UAV-Borne Profiling Radar for Forest Research.

Published in:

Remote Sensing, 2017, v. 9, n. 1, p. 58, doi. 10.3390/rs9010058

By:

Yuwei Chen;
Hakala, Teemu;
Karjalainen, Mika;
Ziyi Feng;
Jian Tang;
Litkey, Paula;
Kukko, Antero;
Jaakkola, Anttoni;
Hyyppä, Juha

Publication type:

Article

Using UAV-Based Photogrammetry and Hyperspectral Imaging for Mapping Bark Beetle Damage at Tree-Level.

Published in:

Remote Sensing, 2015, v. 7, n. 11, p. 15467, doi. 10.3390/rs71115467

By:

Näsi, Roope;
Honkavaara, Eija;
Lyytikäinen-Saarenmaa, Päivi;
Blomqvist, Minna;
Litkey, Paul;
Hakala, Teemu;
Viljanen, Niko;
Kantola, Tuula;
Tanhuanpää, Topi;
Holopainen, Markus

Publication type:

Article

Investigating Bi-Temporal Hyperspectral Lidar Measurements from Declined Trees--Experiences from Laboratory Test.

Published in:

Remote Sensing, 2015, v. 7, n. 10, p. 13863, doi. 10.3390/rs71013863

By:

Junttila, Samuli;
Kaasalainen, Sanna;
Vastaranta, Mikko;
Hakala, Teemu;
Nevalainen, Olli;
Holopainen, Markus

Publication type:

Article

Processing and Assessment of Spectrometric, Stereoscopic Imagery Collected Using a Lightweight UAV Spectral Camera for Precision Agriculture.

Published in:

Remote Sensing, 2013, v. 5, n. 10, p. 5006, doi. 10.3390/rs5105006

By:

Honkavaara, Eija;
Saari, Heikki;
Kaivosoja, Jere;
Pölönen, Ilkka;
Hakala, Teemu;
Litkey, Paula;
Mäkynen, Jussi;
Pesonen, Liisa

Publication type:

Article

Land Surface Albedos Computed from BRF Measurements with a Study of Conversion Formulae.

Published in:

Remote Sensing, 2010, v. 2, n. 8, p. 1918, doi. 10.3390/rs2081918

By:

Peltoniemi, Jouni I.;
Manninen, Terhikki;
Suomalainen, Juha;
Hakala, Teemu;
Puttonen, Eetu;
Riihelä, Aku

Publication type:

Article

Analysis of Properties of Reflectance Reference Targets for Permanent Radiometric Test Sites of High Resolution Airborne Imaging Systems.

Published in:

Remote Sensing, 2010, v. 2, n. 8, p. 1892, doi. 10.3390/rs2081892

By:

Eija Honkavaara;
Teemu Hakala;
Jouni Peltoniemi;
Juha Suomalainen;
Eero Ahokas;
Lauri Markelin

Publication type:

Article

Exploring forest changes in an Ips typographus L. outbreak area: insights from multi-temporal multispectral UAS remote sensing.

Published in:

European Journal of Forest Research, 2024, v. 143, n. 6, p. 1871, doi. 10.1007/s10342-024-01734-5

By:

Östersund, Madeleine;
Honkavaara, Eija;
Oliveira, Raquel A.;
Näsi, Roope;
Hakala, Teemu;
Koivumäki, Niko;
Pelto-Arvo, Mikko;
Tuviala, Johanna;
Nevalainen, Olli;
Lyytikäinen-Saarenmaa, Päivi

Publication type:

Article