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[Kilian Demeulemeester <>]

Hello, 

Here is the point cloud in PLY format: 
https://drive.google.com/file/d/1cPcxFLQCccmd2X1OWzunc0WtRIiuM9f0/view?usp=sharing
 

Best,

Bien cordialement.
Kilian Demeulemeester 
Directeur R&D  
Snapkin | Outil de mesure et de mise en plan 2D/3D pour le bâtiment.
Tél : +33 (0)7 83 49 82 36 | Discutons !


-----Message d'origine-----
De : 

 
<>
 De la part de Simon Giraudot
Envoyé : lundi 9 juillet 2018 09:27
À : 

Objet : Re: [cgal-discuss] Point Set Shape Detection - connected component do 
not provide expected results

Hello,

Le 06/07/2018 à 15:33, Kilian Demeulemeester a écrit :
> The point cloud is available here: 
> https://drive.google.com/open?id=1r4-9vLq35L6c4SwlGvqppzv6-wrP8nfV (108Mo).
I can't seem to open E57 files, could you convert your point cloud to another 
format? (PLY, OFF, LAS, XYZ.)

Thank you,

--
Simon Giraudot, PhD
R&D Engineer
GeometryFactory - http://geometryfactory.com/


>
> We are using CGAL 4.10.2.
>
> I've seen that there has been changes relative to that package but... 
> nothing related to this.
>
> I've checked the release note and didn't see anything related to that bug.
>
> I've also blamed the changes of the method connected_component in 
> CGAL\Shape_detection_3\Shape_base.h - and did not find any changes lately.
>
> As for now, I think I will try to extend the class 
> CGAL::Shape_detection_3::Plane<Traits> to create my own version - and 
> overload the connected_component method to use our own version (using 
> opencv).
>
>
> Bien cordialement.
> Kilian Demeulemeester
> Directeur R&D
> Snapkin | Outil de mesure et de mise en plan 2D/3D pour le bâtiment.
> Tél : +33 (0)7 83 49 82 36 | Discutons !
> 
>
> -----Message d'origine-----
> De : 
> 
>  
> <>
>  De la part de Simon Giraudot
> Envoyé : vendredi 6 juillet 2018 15:04
> À : 
> 
> Objet : Re: [cgal-discuss] Point Set Shape Detection - connected component 
> do not provide expected results
>
> Hello,
>
> This is indeed unexpected. From what you explain in your email, I don't 
> think you did anything wrong, so I suspect there is a bug in the package. 
> What version of CGAL do you use? There has been some changes in the Shape 
> Detection package lately (but if I remember correctly, nothing that 
> addresses a bug like this one).
>
> Is there any way you could you share the point cloud so I can try to 
> reproduce it and find where is the bug?
>
> Best,
>
> --
> Simon Giraudot, PhD
> R&D Engineer
> GeometryFactory - http://geometryfactory.com/
>
>
> Le 06/07/2018 à 10:16, KDemeul a écrit :
>> Hello,
>>
>> I am trying to use the  Point Set Shape Detection
>> <https://doc.cgal.org/latest/Point_set_shape_detection_3/index.html#Chapter_Point_Set_Shape_Detection>
>> package - in order to detect PLANEs only.
>>
>> I've defined the value of the parameters as follow:
>> -probability=0.01
>> - minPoints=10000
>> - epsilon=0.01
>> - clusterEpsilon=0.05
>> - normalThreshold=0.9
>>
>> However, it seems that the clusterEpsilon parameter is not correctly taken
>> into account.
>>
>> Here is an example of a plane detected by the algorithm.
>>
>> As one can see, the left part is disconnected from the right part - by a 
>> gap
>> of approx 1.6m.
>>
>> <http://cgal-discuss.949826.n4.nabble.com/file/t375977/Sans_titre.png>
>>
>> Is there something I don't get?
>>
>> Best regards,
>>
>> Kilian Demeulemeester.
>>
>>
>>
>> --
>> Sent from: http://cgal-discuss.949826.n4.nabble.com/
>>
>
>



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