Search results for: Juha Hyyppä

Items from 1 to 20 out of 69 results

article

Confirmation of post-harvest spectral recovery from Landsat time series using measures of forest cover and height derived from airborne laser scanning data

Joanne C. White, Ninni Saarinen, Ville Kankare, Michael A. Wulder, more

Remote Sensing of Environment > 2018 > 216 > C > 262-275

Landsat time series (LTS) enable the characterization of forest recovery post-disturbance over large areas; however, there is a gap in our current knowledge concerning the linkage between spectral measures of recovery derived from LTS and actual manifestations of forest structure in regenerating stands. Airborne laser scanning (ALS) data provide useful measures of forest structure that can be used...

article

In-situ measurements from mobile platforms: An emerging approach to address the old challenges associated with forest inventories

Xinlian Liang, Antero Kukko, Juha Hyyppä, Matti Lehtomäki, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2018 > 143 > C > 97-107

Accurate assessments of forest resources rely on ground truth data that are collected via in-situ measurements, which are fundamental for all other statistical- and/or remote-sensing-based deductions on quantified forest attributes. The major bottleneck of the current in-situ observation system is that the data collection is time consuming, and, thus, limited in extent, which potentially biases any...

article

Depth camera indoor mapping for 3D virtual radio play

Juho‐Pekka Virtanen, Matti Kurkela, Tuomas Turppa, Matti T. Vaaja, more

The Photogrammetric Record > 33 > 162 > 171 - 195

By combining game engines with indoor mapping, it is possible to create interactive virtual environments that represent the real world. In this paper a virtual version of an audio installation in a historic building is produced, where the user freely explores the building and experiences a set of audio clips, creating a virtual radio play. A depth camera indoor mapping system, Matterport, captured...

article

An overview of the laser ranging method of space laser altimeter

Hui Zhou, Yuwei Chen, Juha Hyyppä, Song Li

Infrared Physics & Technology > 2017 > 86 > C > 147-158

Space laser altimeter is an active remote sensing instrument to measure topographic map of Earth, Moon and planetary. The space laser altimeter determines the range between the instrument and laser footprint by measuring round trip time of laser pulse. The return pulse reflected from ground surface is gathered by the receiver of space laser altimeter, the pulsewidth and amplitude of which are changeable...

article

Arctic Mackenzie Delta channel planform evolution during 1983–2013 utilising Landsat data and hydrological time series

Jenni‐Mari Vesakoski, Tua Nylén, Berit Arheimer, David Gustafsson, more

Hydrological Processes > 31 > 22 > 3979 - 3995

Arctic deltas, such as the Mackenzie Delta, are expected to face major climate change and increased human influence in the near future. Deltas are characterised by highly dynamic fluvial processes, and changing climate will cause considerable evolution of the riverine environment. The changes are difficult to predict with existing knowledge and data. This study quantified channel planform change of...

article

Graph SLAM correction for single scanner MLS forest data under boreal forest canopy

Antero Kukko, Risto Kaijaluoto, Harri Kaartinen, Ville V. Lehtola, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2017 > 132 > C > 199-209

Mobile laser scanning (MLS) provides kinematic means to collect three dimensional data from surroundings for various mapping and environmental analysis purposes. Vehicle based MLS has been used for road and urban asset surveys for about a decade. The equipment to derive the trajectory information for the point cloud generation from the laser data is almost without exception based on GNSS-IMU (Global...

article

A Novel GNSS Technique for Predicting Boreal Forest Attributes at Low Cost

Jingbin Liu, Juha Hyyppa, Xiaowei Yu, Anttoni Jaakkola, more

IEEE Transactions on Geoscience and Remote Sensing > 2017 > 55 > 9 > 4855 - 4867

One of the biggest challenges in forestry research is the effective and accurate measuring and monitoring of forest variables, as the exploitation potential of forest inventory products largely depends on the accuracy of estimates and on the cost of data collection. This paper presented a novel computational method of low-cost forest inventory using global navigation satellite system (GNSS) signals...

article

Object-based analysis of multispectral airborne laser scanner data for land cover classification and map updating

Leena Matikainen, Kirsi Karila, Juha Hyyppä, Paula Litkey, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2017 > 128 > C > 298-313

During the last 20years, airborne laser scanning (ALS), often combined with passive multispectral information from aerial images, has shown its high feasibility for automated mapping processes. The main benefits have been achieved in the mapping of elevated objects such as buildings and trees. Recently, the first multispectral airborne laser scanners have been launched, and active multispectral information...

article

Automated matching of multiple terrestrial laser scans for stem mapping without the use of artificial references

Jingbin Liu, Xinlian Liang, Juha Hyyppä, Xiaowei Yu, more

International Journal of Applied Earth Observation and Geoinformation > 2017 > 56 > C > 13-23

Terrestrial laser scanning has been widely used to analyze the 3D structure of a forest in detail and to generate data at the level of a reference plot for forest inventories without destructive measurements. Multi-scan terrestrial laser scanning is more commonly applied to collect plot-level data so that all of the stems can be detected and analyzed. However, it is necessary to match the point clouds...

article

Feasibility of Multispectral Airborne Laser Scanning Data for Road Mapping

Kirsi Karila, Leena Matikainen, Eetu Puttonen, Juha Hyyppa

IEEE Geoscience and Remote Sensing Letters > 2017 > 14 > 3 > 294 - 298

Multispectral airborne laser scanning (ALS) data have recently become available. The objective of this letter is to study the feasibility of these data for road mapping—for road detection and road surface classification. The results are compared with the results of traditional aerial ortho images using object-based image analysis and Random Forest classification. The results demonstrate that the multispectral...

article

Feasibility of Terrestrial laser scanning for collecting stem volume information from single trees

Ninni Saarinen, Ville Kankare, Mikko Vastaranta, Ville Luoma, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2017 > 123 > C > 140-158

Interest in measuring forest biomass and carbon stock has increased as a result of the United Nations Framework Convention on Climate Change, and sustainable planning of forest resources is therefore essential. Biomass and carbon stock estimates are based on the large area estimates of growing stock volume provided by national forest inventories (NFIs). The estimates for growing stock volume based...

article

Temporal and spatial variations of global ionospheric total electron content under various solar conditions

Jingbin Liu, Manuel Hernandez-Pajares, Xinlian Liang, Jiachun An, more

Journal of Geodesy > 2017 > 91 > 5 > 485-502

By utilizing the numerical technique of principal component analysis (PCA), this work analyses temporal and spatial variations of the ionosphere under various solar conditions during the period 1999–2013. Applying the PCA technique to the time series of the global ionospheric total electron content (TEC) maps provides an efficient method for analyzing the main ionospheric variability on a global scale...

chapter

Mobile laser scanning based 3D technology for mineral environment modeling and positioning

Yuwei Chen, Jian Tang, Juha Hyyppa, Zhijie Wen, more

2016 Fourth International Conference on Ubiquitous Positioning, Indoor Navigation and Location Based Services (UPINLBS) > 289 - 294

2016 Fourth International Conference on Ubiquitous Positioning, Indoor Navigation and Location Based Services (UPINLBS)

The laser scanning based mobile mapping technology has been extensively investigated in academia in last two decades. It has been fully accepted by some traditional industries, such as surveying and forestry. However, for other traditional industries, the potential applications with such a high efficient, high speed 3D modeling technology are still underestimated. In this paper, we try to investigate...

article

International Benchmarking of the Individual Tree Detection Methods for Modeling 3-D Canopy Structure for Silviculture and Forest Ecology Using Airborne Laser Scanning

Yunsheng Wang, Juha Hyyppa, Xinlian Liang, Harri Kaartinen, more

IEEE Transactions on Geoscience and Remote Sensing > 2016 > 54 > 9 > 5011 - 5027

Canopy structure plays an essential role in biophysical activities in forest environments. However, quantitative descriptions of a 3-D canopy structure are extremely difficult because of the complexity and heterogeneity of forest systems. Airborne laser scanning (ALS) provides an opportunity to automatically measure a 3-D canopy structure in large areas. Compared with other point cloud technologies...

article

Remote sensing methods for power line corridor surveys

Leena Matikainen, Matti Lehtomäki, Eero Ahokas, Juha Hyyppä, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2016 > 119 > C > 10-31

To secure uninterrupted distribution of electricity, effective monitoring and maintenance of power lines are needed. This literature review article aims to give a wide overview of the possibilities provided by modern remote sensing sensors in power line corridor surveys and to discuss the potential and limitations of different approaches. Monitoring of both power line components and vegetation around...

article

Can global navigation satellite system signals reveal the ecological attributes of forests?

Jingbin Liu, Juha Hyyppä, Xiaowei Yu, Anttoni Jaakkola, more

International Journal of Applied Earth Observation and Geoinformation > 2016 > 50 > C > 74-79

Forests have important impacts on the global carbon cycle and climate, and they are also related to a wide range of industrial sectors. Currently, one of the biggest challenges in forestry research is effectively and accurately measuring and monitoring forest variables, as the exploitation potential of forest inventory products largely depends on the accuracy of estimates and on the cost of data collection...

chapter

Range calibration of airborne profiling radar used in forest inventory

Ziyi Feng, Yuwei Chen, Teemu Hakala, Juha Hyyppa

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) > 6672 - 6675

IGARSS 2016 - 2016 IEEE International Geoscience and Remote Sensing Symposium

In this paper, a range calibration and modulation sweep linearity verification method of a helicopter-borne FM-CW (Frequency-Modulated Continuous Waveform) profiling radar are presented. The radar is designed to collect backscatter signal waveforms to build target stand profiles. Various forest elements e.g. tree height; density; species, etc. can be evaluated through this profiling radar. This paper...

article

Terrestrial laser scanning in forest inventories

Xinlian Liang, Ville Kankare, Juha Hyyppä, Yunsheng Wang, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2016 > 115 > C > 63-77

Decision making on forest resources relies on the precise information that is collected using inventory. There are many different kinds of forest inventory techniques that can be applied depending on the goal, scale, resources and the required accuracy. Most of the forest inventories are based on field sample. Therefore, the accuracy of the forest inventories depends on the quality and quantity of...

article

A comprehensive but efficient framework of proposing and validating feature parameters from airborne LiDAR data for tree species classification

Yi Lin, Juha Hyyppä

International Journal of Applied Earth Observations and Geoinformation > 2016 > 46 > Complete > 45-55

Tree species information is crucial for digital forestry, and efficient techniques for classifying tree species are extensively demanded. To this end, airborne light detection and ranging (LiDAR) has been introduced. However, the literature review suggests that most of the previous airborne LiDAR-based studies were only based on limited kinds of tree signatures. To address this gap, this study proposed...

chapter

Scan matching technology for forest navigation with map information

Yuwei Chen, Jian Tang, Ehsan Khoramshahi, Teemu Hakala, more

2016 IEEE/ION Position, Location and Navigation Symposium (PLANS) > 198 - 203

2016 IEEE/ION Position, Location and Navigation Symposium - PLANS 2016

The topic of positioning in dense forest has attracted researchers' attention in the last few decades. Currently, accurate and robust positioning in complex forest environment is still not available by using standalone GNSS, and it is a major drawback for forestry automation. Laser scanning-based SLAM demonstrated its potential as an alternative positioning solution in dense boreal forest environment...

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Keywords

REMOTE SENSING (15)
LASER SCANNING (14)
VEGETATION (12)
FORESTRY (10)
LIDAR (10)
ACCURACY (9)
MOBILE LASER SCANNING (8)
TERRESTRIAL LASER SCANNING (8)
FOREST INVENTORY (7)
LASER RADAR (6)
MEASUREMENT BY LASER BEAM (6)
LASER MODES (5)
POINT CLOUD (5)
LASERS (4)
MOBILE COMMUNICATION (4)
THREE-DIMENSIONAL DISPLAYS (4)
AIRBORNE LASER SCANNING (3)
ALS (3)
BIOMASS (3)
CHANGE DETECTION (3)
ESTIMATION (3)
LANDSAT (3)
MAPPING (3)
MOBILE LASER SCANNING (MLS) (3)
MOBILE MAPPING (3)
SOLID MODELING (3)
TLS (3)
ADCP (2)
AIRBORNE LASER SCANNING (ALS) (2)
BOREAL FOREST (2)
CALIBRATION (2)
CROWDSOURCING (2)
DATA COLLECTION (2)
FLUVIAL GEOMORPHOLOGY (2)
GEOSPATIAL ANALYSIS (2)
HISTOGRAMS (2)
IMAGE SEGMENTATION (2)
IMAGE-BASED POINT CLOUD (2)
INDEXES (2)
INDIVIDUAL TREE (2)
INDOOR NAVIGATION (2)
LASER MEASUREMENT APPLICATION (2)
MEANDERING (2)
MOBILE (2)
MODELLING (2)
MONITORING (2)
MULTISPECTRAL (2)
PERSONAL LASER SCANNING (2)
PLOT-LEVEL FOREST VARIABLES (2)
REMOTE SENSING BY LASER BEAM (2)
ROADS (2)
SHAPE (2)
STEM CURVE (2)
TREE SPECIES CLASSIFICATION (2)
UAV (2)
URBAN FOREST (2)
VEGETATION MAPPING (2)
3D DATA (1)
3D MODEL (1)
3D MODEL SIMPLIFICATION (1)
3D MODELING (1)
ABOVEGROUND (1)
ABOVEGROUND BIOMASS (1)
ABSTRACTS (1)
AERIAL (1)
AERIAL PHOTOGRAPHS (1)
AERIAL-TO-GROUND (1)
AIRBORNE LASER-SCANNING (ALS) (1)
AIRBORNE LIDAR (1)
AIRBORNE RADAR (1)
AMBIENT INTELLIGENCE (1)
AMBIENT LIGHT POSITIONIG (1)
ANALYTICAL MODELS (1)
ANISOTROPY (1)
ARC FITTING (1)
ARTIFICIAL INTELLIGENCE (1)
ATMOSPHERE MONITORING WITH GEODETIC TECHNIQUES (1)
BACKSCATTER (1)
BARIUM (1)
BEDLOAD TRANSPORT (1)
BENCHMARK (1)
BENCHMARK TESTING (1)
BIDIRECTIONAL REFLECTANCE (1)
BIOMEDICAL MONITORING (1)
BOREAL (1)
BOREAL FOREST HEIGHT ESTIMATION (1)
BUILDINGS (1)
CAMERA (1)
CAMERAS (1)
CANOPY STRUCTURE (1)
CFD (1)
CITIES AND TOWNS (1)
CLASSIFICATION (1)
CLIMATE CHANGE (1)
CLOUDS (1)
CLUSTERING (1)
CLUSTERING ALGORITHMS (1)
COAL MINE (1)
COHERENCE (1)
COHERENCE TOMOGRAPHY (1)
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Elsevier (32)
ieee (29)
Springer (4)
Wiley (4)

INFONA - science communication portal

Search results for: Juha Hyyppä

Confirmation of post-harvest spectral recovery from Landsat time series using measures of forest cover and height derived from airborne laser scanning data

In-situ measurements from mobile platforms: An emerging approach to address the old challenges associated with forest inventories

Depth camera indoor mapping for 3D virtual radio play

An overview of the laser ranging method of space laser altimeter

Arctic Mackenzie Delta channel planform evolution during 1983–2013 utilising Landsat data and hydrological time series

Graph SLAM correction for single scanner MLS forest data under boreal forest canopy

A Novel GNSS Technique for Predicting Boreal Forest Attributes at Low Cost

Object-based analysis of multispectral airborne laser scanner data for land cover classification and map updating

Automated matching of multiple terrestrial laser scans for stem mapping without the use of artificial references

Feasibility of Multispectral Airborne Laser Scanning Data for Road Mapping

Feasibility of Terrestrial laser scanning for collecting stem volume information from single trees

Temporal and spatial variations of global ionospheric total electron content under various solar conditions

Mobile laser scanning based 3D technology for mineral environment modeling and positioning

International Benchmarking of the Individual Tree Detection Methods for Modeling 3-D Canopy Structure for Silviculture and Forest Ecology Using Airborne Laser Scanning

Remote sensing methods for power line corridor surveys

Can global navigation satellite system signals reveal the ecological attributes of forests?

Range calibration of airborne profiling radar used in forest inventory

Terrestrial laser scanning in forest inventories

A comprehensive but efficient framework of proposing and validating feature parameters from airborne LiDAR data for tree species classification

Scan matching technology for forest navigation with map information

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