Fitting a cilinder to 3D vertices
5 views (last 30 days)
Show older comments
Alonso Figueroa
on 29 May 2018
Commented: Walter Roberson
on 31 May 2020
I am having problems fitting a cylinder to a point cloud. Trying to use "pcfitcylinder", an error saying 'the value of 'ptCloud' is invalid. Expected ptCloud to be a pointCloud object' while the pointcloud is a nx3 created from the vertices of an .stl file. The code is:
Bone_model=stlread(fullfile(Bone_path,Bone_file));
maxDistance=.5
cilinder = pcfitcylinder(Bone_model.vertices,maxDistance);
pcshow (Bone_model.vertices);hold on;
plot(cilinder)
Is there anything i'm doing wrong?
1 Comment
Accepted Answer
Walter Roberson
on 30 May 2018
stlread() appears to be one of the functions from the File Exchange, probably https://www.mathworks.com/matlabcentral/fileexchange/22409-stl-file-reader
The vertices returned by that stlread() function are configured for use by patch(). pcfitcylinder() requires that a pointcloud object be passed in.
You might be able to use
pc = pointcloud(Bone_model.vertices);
[cilinder,inlierIndices] = pcfitcylinder(pc, maxDistance);
cylpc = select(cilinder, inlierIndices);
pcshow(cylpc)
Note that pcfitcylinder attempts to find a subset of the pointcloud that is in the form of an cylinder.
7 Comments
M.S. Khan
on 31 May 2020
Hi Danny,
could you please explain the coding to me. i also want to apply it on my problem.
Warm regards,
Walter Roberson
on 31 May 2020
M.S. Khan, which coding are you referring to? The only line of code that Daniel posted was
TalusPtCloud = pointCloud(Talus.solidVertices{1,1}, 'Normal', Talus.solidNormals{1,1});
More Answers (0)
See Also
Categories
Find more on Point Cloud Processing in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!