Automatic Tree Segmentation Crashes about 3d-forest-classic

[acardoso85]

Hi, thank you very much for creating and maintaining this great application.
I am having similar problem, related with the issue title.

I am trying to use 3D Forest application for Linux (ubuntu 22.4) to segment also a large point cloud from a forest parcel obtained with TLS.
I was able to import the base cloud (.las), and also separate terrain from vegetation.
In the automatic tree segmentation step, I set the parameters, the program start processing, until a moment that it closed.
Here are the lines form the Terminal:

parametry - prefix: ID_
parametry - vegetace-rest: vegetation-rest
parametry - input-vegetace: cloud_subtraction.pcd
parametry - input-veliksot: 0.06
parametry - input-range: 0.75
parametry - input-multiplikator: 2
parametry - input-elementy: 150
parametry - input-typ: PCA
parametry - input-distance from terrain: 1.8
thread vytvoren
seg nastaveno
connect nastaveno
SegmentationOctree::createOctree()
Tue May 9 15:38:06 2023
Segmentation::ccomputeDescriptor()
Tue May 9 15:38:10 2023
intensityMin: 0
intensityMax: 66.6667
m_PCAValue: 50
SegmentationOctree::mergeClusters()
Tue May 9 15:38:15 2023
SegmentationOctree::createComponents()
Tue May 9 15:38:16 2023
SegmentationOctree::findNeighborElements()
Tue May 9 15:38:16 2023
free(): double free detected in tcache 2
Abortado (`core' generado)

I probed with different point cloud and different set of parameters, and happened the same.
The last two lines seem to be the error. I think the program crashes when it runs this function: findNeighborElements()

I wonder which could be the problem o some recomendation to solve?
Thanks!
Andrea

[Loris-L]

Hi @acardoso85 , have you tried to convert the base cloud from .las to .pcd and use that one for all steps in 3DForest?

[acardoso85]

Hi @Loris-L , yes. I converted the .las to .pcd in Cloud compare. If I start project with .pcd file, when I start the automatic segmentation the program crash in the same step.
parametry - prefix: ID
parametry - vegetace-rest: vegetation-rest
parametry - input-vegetace: Vegetation_octree_25.pcd
parametry - input-veliksot: 0.05
parametry - input-range: 0.7
parametry - input-multiplikator: 2
parametry - input-elementy: 150
parametry - input-typ: PCA
parametry - input-distance from terrain: 1.6
thread vytvoren
seg nastaveno
connect nastaveno
SegmentationOctree::createOctree()
Tue May 23 10:21:40 2023
Segmentation::ccomputeDescriptor()
Tue May 23 10:21:43 2023
intensityMin: 0
intensityMax: 66.663
m_PCAValue: 46
SegmentationOctree::mergeClusters()
Tue May 23 10:21:49 2023
SegmentationOctree::createComponents()
Tue May 23 10:21:49 2023
SegmentationOctree::findNeighborElements()
Tue May 23 10:21:49 2023
free(): double free detected in tcache 2
Abortado (`core' generado)

I will appreciated more suggestions, or any idea why it could be happened this.
Thanks Andrea

[Loris-L]

@acardoso85 idk why 3D Forest crashes, but you could try to do the segmentation in Cloud Compare