[vtkusers] what's the contour iso surface of human skin

[Ali Habib]

Dear Jim

I used  the below code but the output still contain internal structure as
attached output display

vtk.vtkDICOMImageReader VDR = new vtk.vtkDICOMImageReader();
            VDR.SetDirectoryName(@"E:\Master
Degree\DataSet\case2\DICOM\PA1\ST1\SE2");
            VDR.SetDataOrigin(0, 0, 0);
            VDR.Update();

            vtkImageThreshold VIT = new vtkImageThreshold();
            VIT.ThresholdBetween(-300, 300);
            VIT.SetInputConnection(VDR.GetOutputPort());

            VIT.Update();

            vtk.vtkImageIslandRemoval2D ImageIslandRemoval2D = new
vtk.vtkImageIslandRemoval2D();
            ImageIslandRemoval2D.SetInput(VIT.GetOutput());
            ImageIslandRemoval2D.SetAreaThreshold(1000);

            vtk.vtkContourFilter skinExtractor = new vtk.vtkContourFilter();

 skinExtractor.SetInputConnection(ImageIslandRemoval2D.GetOutputPort());
            //skinExtractor.SetValue(0, -500);
            skinExtractor.GenerateValues(1, -300, 300);
            skinExtractor.ComputeGradientsOn();

            vtk.vtkPolyDataConnectivityFilter VPDC = new
vtk.vtkPolyDataConnectivityFilter();
            VPDC.SetInput(skinExtractor.GetOutput());
            VPDC.SetExtractionModeToLargestRegion();
            VPDC.Update();

            // map to graphics library
            vtkPolyDataMapper map = new vtkPolyDataMapper();
            map.SetInput(VPDC.GetOutput());

            // actor coordinates geometry, properties, transformation
            vtkActor aSphere = new vtkActor();
            aSphere.SetMapper(map);
            aSphere.GetProperty().SetColor(0, 0, 1); // sphere color blue

            // a renderer and render window
            vtkRenderer ren1 = new vtkRenderer();
            vtkRenderWindow renWin = new vtkRenderWindow();
            renWin.AddRenderer(ren1);

            // an interactor
            vtkRenderWindowInteractor iren = new
vtkRenderWindowInteractor();
            iren.SetRenderWindow(renWin);

            // add the actor to the scene
            ren1.AddActor(aSphere);
            ren1.SetBackground(1, 1, 1); // Background color white

            // render an image (lights and cameras are created
automatically)
            renWin.Render();

            // begin mouse interaction
            iren.Start();
            // release memory and return
            VPDC.Dispose();
            map.Dispose();
            aSphere.Dispose();
            ren1.Dispose();
            renWin.Dispose();
            iren.Dispose();

Any suggestion please

Best regards

On Sun, Oct 10, 2010 at 12:02 PM, Jim Peterson <jimcp at cox.net> wrote:

> Ali Habib wrote:
>
>> I'm sorry for disturbance , but could you give me sample example
>>  Best regards
>>
>>  Ali,
>
> vtkContourFilter has a function GenerateValues() that creates contours for
> an equally distributed set of values between low and high specified. in the
> snippet below, VoxelData is an instance of vtkImageData.
>
> ...
>       vtkContourFilter skinExtractor = new vtkContourFilter();
>       skinExtractor.SetInput(VoxelData);
>       skinExtractor.GenerateValues(3, -200, 2300);
> ...
>
> This example gives 3 contours at -200, 1050 and 2300. to search for tissues
> I think I would look in the range of -300 to 300. I think there is a fairly
> wide range of values that all resolve to some aspect of skin.
>
> HTH,
> Jim
>
>
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