Extract 3D model of interest from multiple 3D mesh models

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Mario 2018-9-1

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https://ww2.mathworks.cn/matlabcentral/answers/417086-extract-3d-model-of-interest-from-multiple-3d-mesh-models

评论： Mario 2018-9-1

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Hi,

I am currently trying to extract my desired 3D model from multiple reconstucted 3D mesh models (see attached image).

The code that I currently have is:

m = isosurface(Phi1,0.5); % reconstructed mesh 3D models from binary 3D images
VER=m.vertices; % obtained vertices from all reconstructed mesh 3D models
FAC=m.faces; % obtained faces from all reconstructed mesh 3D models
SMesh=splitFV(FAC,VER); %implemented code shown in the link below
colours = lines(length(SMesh));
    for i=1:length(SMesh)
       QQ=patch(SMesh(i),'facecolor',colours(i,:),'EdgeColor','none');
    end
[xi,yi] = getpts() % obtained xi and yi coordinates from a mouse click

As you can see, I labelled all defined independent mesh models (shown in separate colors) by using code implemented in this link.

Now i have a variable SMesh containing all these labelled mesh 3D models, and each model has its defined faces and vertices.

Now I am trying to interactively, by using a mouse click, define a desired 3D model for extraction and extract it from those labelled 3D models.

I searched and found getpts(), but I am not sure if and how to implement it's extracted X,Y coordinates to do what I need, and if this approach is possible.

How can I do this? Any help would be greatly appreciated.

Thanks in advance!

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KSSV 2018-9-1

The major part of the mesh you need is in green color..I think you have it already??

Mario 2018-9-1

Hi KSSV,

In a way I do, if you consider that the green colored part is the largest, so I can extract it based on that feature.

But, this is somewhat a good case. There will be cases where multiple mesh 3D models are similar in size, so that is the reason why I want to be able to interactively select the desired mesh 3D model and extract it.

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