[vtkusers] ActiViz C# | add 2 actors
Matias Montroull
matimontg at gmail.com
Tue Jan 21 07:53:09 EST 2014
Thank you, seems to work, at least I see both images in the same position
now.
Now, if I understand correctly, the NDI tracker points should try to match
the mesh points, that's not happening, my NDI points although are closer to
the mesh, still are upside down even after running
vtkIterativeClosestPointTransform (see the image attached). So I think even
if it runs correctly, it's going to be hard for vtk to find the match
between points..
Thanks,
On Mon, Jan 20, 2014 at 7:12 PM, Maarten Beek <beekmaarten at yahoo.com> wrote:
> Source is moved to target -> it's your choice
>
> use StartByMatchingCentroidsOn() to align the centers first.
>
>
>
>
> On Monday, January 20, 2014 1:57:24 PM, Matias Montroull <
> matimontg at gmail.com> wrote:
> Ok, so here's my code: See the registration commented section at the
> bottom.
>
> Question, Source should be my NDI points or the mesh points?
>
> Thanks for your time..
>
> //Mesh
> vtkDICOMImageReader readerdicom = new vtkDICOMImageReader();
> readerdicom.SetDirectoryName(@"C:\CDDICOM\images");
> readerdicom.Update();
>
> //extract skin
> vtkContourFilter skinextractor = vtkContourFilter.New();
> skinextractor.SetInputConnection(readerdicom.GetOutputPort());
> skinextractor.SetValue(0, -800);
>
> //remove inner points
> vtkPolyDataConnectivityFilter contornos = new
> vtkPolyDataConnectivityFilter();
> contornos.SetInputConnection(skinextractor.GetOutputPort());
> contornos.SetExtractionModeToLargestRegion();
> contornos.SetColorRegions(1);
> vtkCleanPolyData removepoints = new vtkCleanPolyData();
> removepoints.SetInput(contornos.GetOutput());
> removepoints.Update();
>
> vtkPolyDataNormals skinnormals = vtkPolyDataNormals.New();
> skinnormals.SetInputConnection(removepoints.GetOutputPort());
> skinnormals.SetFeatureAngle(90.0);
> skinnormals.ComputePointNormalsOn();
>
> vtkPolyDataMapper skinmapper = vtkPolyDataMapper.New();
> skinmapper.SetInputConnection(skinnormals.GetOutputPort());
> skinmapper.ScalarVisibilityOff();
>
> vtkActor actor_mesh = vtkActor.New();
> actor_mesh.SetMapper(skinmapper);
>
>
> //Rregistracion (I load my NDI tracker registered points)
>
> vtkTesting test = vtkTesting.New();
> string root = test.GetDataRoot();
> string filePath = System.IO.Path.Combine(root,
> @"C:/tracker/reg.poi");
>
> FileStream fs = null;
> StreamReader sr = null;
> String sLineBuffer;
> String[] sXYZ;
> char[] chDelimiter = new char[] { ' ', '\t', ';' };
> double[] xyz = new double[3];
> vtkPoints points = vtkPoints.New();
> int cnt = 0;
>
>
> // in case file must be open in another application too use
> "FileShare.ReadWrite"
> fs = new FileStream(filePath, FileMode.Open, FileAccess.Read,
> FileShare.ReadWrite);
> sr = new StreamReader(fs);
> while (!sr.EndOfStream)
> {
> sLineBuffer = sr.ReadLine();
> cnt++;
> sXYZ = sLineBuffer.Split(chDelimiter,
> StringSplitOptions.RemoveEmptyEntries);
> if (sXYZ == null)
> {
> System.Windows.MessageBox.Show("data seems to be in
> wrong format at line " + cnt, "Format Exception");
> return;
> }
> xyz[0] = double.Parse(sXYZ[0],
> CultureInfo.InvariantCulture);
> xyz[1] = double.Parse(sXYZ[1],
> CultureInfo.InvariantCulture);
> xyz[2] = double.Parse(sXYZ[2],
> CultureInfo.InvariantCulture);
> points.InsertNextPoint(xyz[0], xyz[1], xyz[2]);
> }
> vtkPolyData polydata = vtkPolyData.New();
> polydata.SetPoints(points);
>
> vtkSurfaceReconstructionFilter surf = new
> vtkSurfaceReconstructionFilter();
> surf.SetInput(polydata);
> vtkContourFilter cf = new vtkContourFilter();
> cf.SetInputConnection(surf.GetOutputPort());
>
> vtkVertexGlyphFilter glyphFilter = vtkVertexGlyphFilter.New();
> glyphFilter.SetInputConnection(polydata.GetProducerPort());
> glyphFilter.Update();
> // Visualize
> vtkPolyDataMapper registracion_mapper =
> vtkPolyDataMapper.New();
>
>
> registracion_mapper.SetInputConnection(glyphFilter.GetOutputPort());
> vtkActor actorregistracion = vtkActor.New();
> actorregistracion.SetMapper(registracion_mapper);
> actorregistracion.GetProperty().SetPointSize(3);
> actorregistracion.GetProperty().SetColor(1, 0.5, 0);
>
> double[] a = actorregistracion.GetCenter();
> double[] b = actor_mesh.GetCenter();
>
>
>
> //Registration:
> vtkIterativeClosestPointTransform closestpoints = new
> vtkIterativeClosestPointTransform();
> closestpoints.SetSource(removepoints.GetOutput());
> closestpoints.SetTarget(glyphFilter.GetOutput());
> closestpoints.GetLandmarkTransform().SetModeToRigidBody();
> closestpoints.SetMaximumNumberOfIterations(1000);
> closestpoints.SetMaximumNumberOfLandmarks(400);
> closestpoints.StartByMatchingCentroidsOff();
> closestpoints.Modified();
> closestpoints.Update();
>
> vtkTransformPolyDataFilter transform = new
> vtkTransformPolyDataFilter();
> transform.SetInput(removepoints.GetOutput());
> transform.SetTransform(closestpoints);
> transform.Update();
>
> vtkPolyDataMapper solucion_mapper = vtkPolyDataMapper.New();
> solucion_mapper.SetInputConnection(transform.GetOutputPort());
> vtkActor actorsolucion = vtkActor.New();
> actorsolucion.SetMapper(solucion_mapper);
> actorsolucion.GetProperty().SetColor(0, 0, 1);
> actorsolucion.GetProperty().SetPointSize(3);
>
>
>
> On Mon, Jan 20, 2014 at 3:47 PM, Maarten Beek <beekmaarten at yahoo.com>wrote:
>
> Not after the mapper because that doesn't generate a vtkPolyData (inherits
> from vtkDataSet).
> I would put it at the end of both pipelines (vtkClosestPointTransform
> needs two inputs: source and target) before the results of these pipelines
> are added to their mappers.
> Depends on what data you want to register (vtkPolyDataNormals doesn't
> change the location of the points so you could take the result before this
> algorithm as well).
>
>
> On Monday, January 20, 2014 10:04:10 AM, Maarten Beek <
> beekmaarten at yahoo.com> wrote:
> Both data have their own coordinate system. One from the apparatus that
> generated the skin surface, the other one from the NDI tracker. Both data
> would be in the same coordinate system if some calibration of the equipment
> is performed.
>
> The current data has to be registered to each other (moving one object
> into the coordinate system of the other). A first step would be to align
> the centers (see: vtkClosestPointTransform), then some additional
> iterations would be required to improve the registration.
>
>
>
> On Saturday, January 18, 2014 7:44:23 PM, Matias Montroull <
> matimontg at gmail.com> wrote:
> Hi,
>
> I've managed to add 2 actors to a render, however, I would like to set the
> same center for both..
>
> Reason being is that I have a skin face surface and a set of points I
> registered using a NDI tracker. So, I'd like to view both to see how close
> my points are to the surface to make some tests and then optimization (find
> the closest points to the surface).
>
> My points appear at the right of the image as shown in the screenshoot
> attached.. Is that because I need to set the center to be the same por
> something else I'm missing?
>
> Thanks!
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20140121/1dfe7fba/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Capture.JPG
Type: image/jpeg
Size: 49342 bytes
Desc: not available
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20140121/1dfe7fba/attachment-0001.jpe>
More information about the vtkusers
mailing list