Eetu Puttonen

Research manager @fgi_nls Remote Sensing Photogrammetry @pointcloudfi laserscanning.fi #coelasr

[SilviLaser 2027 @SilviLaser2027]

🌐 The #official #website of #SilviLaser2027 is now live!

We are pleased to announce the launch of https://t.co/bRpUkMbuBa

#Stay #tuned and visit the website regularly to receive the #latest #updates about the upcoming #SilviLaser 2027 #conference.

[3DOMFBK @3DOMFBK]

@takhtkeshha presenting our joint work with @photo_TUW & @fgi_nls supprted by @EuroSDR on multispectral #lidar for #forestry mapping, characterization and management
#3D #AI @FBK_research

[FGI, NLS @fgi_nls]

Postdoc positions open now at the FGI:
🌊Digital Waters project
🚁Drone Technologies
🗺️Geoinformatics
📡 Laser Scanning
🛰️Satellite Navigation
📏Geodetic Reference Frames
🌌Space Geodesy
This is a unique opportunity, take a chance and apply!
https://t.co/WJYQzx9xet

[Eetu Puttonen @ep_fgi]

! Come work with us !
We are looking for a "Postdoctoral Researcher - laser scanning" for a 3-year position.
Details here: https://t.co/ZUqyQbw681
Call open until 31 December.
See also the other six positions opened up with the @Maanmittaus in @fgi_nls.

https://t.co/PHNWmyYPnl

[CiTIUS @citiususc]

Warmest congratulations to Miguel Yermo García for his successful thesis defense on #HPC solutions for #LiDAR #ALS #PointClouds, pathfinding, and powerline detection.

Your #CiTIUSPhD in high-performance computing is truly inspiring. Well done!

🔗 https://t.co/Wk5hXbCG3l

[Eetu Puttonen @ep_fgi]

The 4D & 5D datasets can be used for point cloud time series visualizations, method testing, as course material, or in 4D TLS experiment planning.

For any questions, drop me a DM or en email.

Have fun!

17/n

[Eetu Puttonen @ep_fgi]

Today, the experiments have evolved into a more permanent forest monitoring setting with our Lidar Phenology unit (LiPhe).

With LiPhe, we are monitoring many interesting phenomena in forest structure over the seasons:

13/n

[Eetu Puttonen @ep_fgi]

@AShcherbacheva et al. (2024), "A study of annual tree-wise LiDAR intensity patterns of boreal species observed using a hyper-temporal laser scanning time series", https://t.co/C6hIMZykoc

16/n

[Eetu Puttonen @ep_fgi]

Puttonen et al. (2015)
https://t.co/DeMowuwmn7

Puttonen et al. (2016)
https://t.co/y6LGBSSrQz

The 5D test data (215MB) measured in Finland is available here:
https://t.co/A0qc2Vim9h

12/n

[Eetu Puttonen @ep_fgi]

These experiments were inspired by the results we found in earlier studies with TLS time series (5D TLS).

The results showed peculiar changes in reflection spectra and branch direction overnight that warranted further investigations:

11/n

[Eetu Puttonen @ep_fgi]

And of course thanks to past and present @fgi_nls colleagues who helped with the data collection.
@KarjalainenM1ka @swittke1 @Xinlian_Liang @LehtomakiMatti @MicrocosmAI
Teemu Hakala, Paula Litkey, Ziyi Feng, Roope Näsi, Aimad el-Issaou

10/n

[Eetu Puttonen @ep_fgi]

A big thanks to @fgi_nls for making the experiments possible and to @SuomenAkatemia for the funding

9/n

[Eetu Puttonen @ep_fgi]

@SamuliJunttila et al. (2022), "Tree Water Status Affects Tree Branch Position", https://t.co/BpI9rnkKyc

7/n

[Eetu Puttonen @ep_fgi]

Glira et al. (2023), "Nonrigid Point Cloud Registration Using Piecewise Tricubic Polynomials as Transformation Model", https://t.co/bVRcVsGyPA

8/n

[Eetu Puttonen @ep_fgi]

Parts of the data have already been used in publications, but there's more to look into.

Puttonen et al. (2019), "A Clustering Framework for Monitoring Circadian Rhythm in Structural Dynamics in Plants From Terrestrial Laser Scanning Time Series"
https://t.co/SGgWbbjsVB

6/n

[Eetu Puttonen @ep_fgi]

About 30 (August) and 20 (October) individual target objects are manually delineated in their own point clouds for quick viewing.

Full point clouds are provided for every fifth scan.

5/n

[Eetu Puttonen @ep_fgi]

Open 4D TLS test data (9.3GB) to try with:
"Three Terrestrial Laser Scanning Point Cloud Time Series Measured Overnight in Finland in August and October 2016"
https://t.co/8MhsPIdT5s

A thread 🧵:

[Eetu Puttonen @ep_fgi]

The data are provided in .laz (1.4) format.

The August data are registered in the same rectilinear coordinate frame, the October data in their own.

4/n

[Eetu Puttonen @ep_fgi]

Each experiment site has tens of scans collected with short intervals using two (October) or three scanners (August).
The experiment site had both natural and artificial target objects.

3/n

[Eetu Puttonen @ep_fgi]

We did three overnight TLS experiments in southern Finland in 2016.

Two nights had leaf-on (late August) and one night leaf-off (middle of October) conditions.

2/n