surface reconstruction

classic Classic list List threaded Threaded
5 messages Options
Reply | Threaded
Open this post in threaded view
|

surface reconstruction

hend helal
if have a set of points for a building model collected from images , how can
i reconstruct the model from these points as an object?
 



--
Sent from: http://www.pcl-users.org/
_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users
Reply | Threaded
Open this post in threaded view
|

Re: surface reconstruction

Stephen McDowell
perhaps one of the surface tutorials may be helpful? http://pointclouds.org/documentation/tutorials/#surface-tutorial

reconstructing a “model” and “as an object” could mean many things and still be accurate.  can you be more specific?  E.g. you want to save them all as one single PCD file?



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users
Reply | Threaded
Open this post in threaded view
|

Re: surface reconstruction

hend helal
well i am supposed to have set of xyz points fro a building , which i go from 2 images of a building , now i want to reconstruct the model of this building using these points , make a sloid object , so is that possible ? and if so how 
i have seen the attached tutorials , they are about triangulation between points , but i need to make surfaces , so any help :D

On 13 April 2018 at 15:37, Stephen McDowell <[hidden email]> wrote:
perhaps one of the surface tutorials may be helpful? http://pointclouds.org/documentation/tutorials/#surface-tutorial

reconstructing a “model” and “as an object” could mean many things and still be accurate.  can you be more specific?  E.g. you want to save them all as one single PCD file?



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users
Reply | Threaded
Open this post in threaded view
|

Re: surface reconstruction

Diego Correa Tristain
The usual approach is a Delanay triangulation.
There's lot of inferences to make about unordered data, but it is the fastest approach.


On Fri, Apr 13, 2018 at 10:54 AM, Hend Helal <[hidden email]> wrote:
well i am supposed to have set of xyz points fro a building , which i go from 2 images of a building , now i want to reconstruct the model of this building using these points , make a sloid object , so is that possible ? and if so how 
i have seen the attached tutorials , they are about triangulation between points , but i need to make surfaces , so any help :D

On 13 April 2018 at 15:37, Stephen McDowell <[hidden email]> wrote:
perhaps one of the surface tutorials may be helpful? http://pointclouds.org/documentation/tutorials/#surface-tutorial

reconstructing a “model” and “as an object” could mean many things and still be accurate.  can you be more specific?  E.g. you want to save them all as one single PCD file?



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users



_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users
Reply | Threaded
Open this post in threaded view
|

Re: surface reconstruction

Stephen McDowell
In reply to this post by hend helal
> they are about triangulation between points , but i need to make surfaces

maybe this is a terminology or domain confusion.  the four tutorials there (including the one Diego sent) are all examples of how to represent surfaces

typically, like Diego suggests, surfaces are represented using a triangulation.  a triangle mesh is the “output” in this scenario.  in most applications triangle meshes are a good choice, speed being a major advantage.  they’re also easier to use in other contexts, e.g. save a .ply file and open it in blender or something.

if you are looking for other surface representations see the B-spline tutorial.  splines are mathematically attractive for many reasons, i’ll leave it to the video for an excellent example of why :)

so if none of the tutorials are the “surface” you are looking for, what is the output you need to make?

_______________________________________________
[hidden email] / http://pointclouds.org
http://pointclouds.org/mailman/listinfo/pcl-users