changepoint kernel

[Maia R.]

Hi everyone,

I'd like to use different kernels on different regions. For example, one kernel at the two extremities of a femur and another one in between. How can I define such regions in Scalismo ?

Thank you very much,

Best regards

[Marcel Luethi]

HI Maia

One simple possibility is to click some landmark points, and define a region as the points that are closest to a given landmark.

Another possibility would be to use a drawing tool, such as meshlab to color the regions, and then use the color as an indicator for the region. (To read a mesh colored mesh, you can use the method readVertexColorMesh3D, that you find in MeshIO).

Best regards,

Marcel

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[V R]

Thank you very much. 

Good idea for the color !

[Maia R.]

Hi,

How can I extract only a specific colored mesh ?

I tried to do this:

====

val coloredMesh = readVertexColorMesh3D("coloredMesh.ply")

val id = coloredMesh.color == Color.red

======

But id is just a boolean.

How can I  get the partial colored mesh or apply a kernel on such a partial colored mesh only ?

Thank you,

Best regards,

Maia

[Marcel Luethi]

Hi Maia

You will need to loop over all the points/pointIds, and extract the point ids with the given color. Something like this should work:

val coloredMesh : VertexColorMesh3D = ???
val idsWithRedColor = coloredMesh.shape.pointSet.pointIds.filter(id => coloredMesh.color(id) == java.awt.Color.RED)

I am not sure, though, about the exact comparison of the colors. You might have to check how the color is represented, by printing out the color at a few point ids.

Best regards,

Marcel

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[Maia R.]

Hi Marcel,

Thanks a lot.

Best regards

Maia