[vtkusers] vtkImageMapToWindowLevelColors

[zx_sanjin at 163.com]

hi all guys:

    I'm using the vtkImageMapToWindowLevelColors class for "Match Colors". I used VS2005, vtk 4.1 under the winodwsXP.   

    I can get the "Match Colors" result, but the result is not good - It seems that something above the result. 

    Here is my code:

    void TestMap2Color()
    {
     vtkDICOMImageReader* reader = vtkDICOMImageReader::New(); 
     reader->SetFileName("c:\\IM2");
     reader->Update();

     vtkLookupTable *hueLut = vtkLookupTable::New();
     hueLut->SetTableRange (0, 2000);
     hueLut->SetHueRange (0, 1);
     hueLut->SetSaturationRange (1, 1);
     hueLut->SetValueRange (1, 1);
     hueLut->Build(); //effective built

     vtkImageMapToWindowLevelColors* pImageMapToColors = vtkImageMapToWindowLevelColors ::New();
     pImageMapToColors->SetLookupTable(hueLut);
     pImageMapToColors->SetInput(reader->GetOutput());
     pImageMapToColors->Update();

     vtkImageViewer* pViewer = vtkImageViewer::New();
     pViewer->SetInput(pImageMapToColors->GetOutput());
     pViewer->GetImageMapper()->SetColorLevel(10);
     pViewer->GetImageMapper()->SetColorWindow(100);
     pViewer->Render();

     vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
     iren->SetRenderWindow(pViewer->GetRenderWindow());
     iren->Initialize();
     iren->Start();
    }
    
    I upload a bmp file for the screen-shot : http://www.chmbook.com/cpptk/upload/20071/cpb2_2007123113255.jpg

    If I used vtkImageViewer2 instead of vtkImageViewer, It work fine! show for this: http://www.chmbook.com/cpptk/upload/20071/cpb2_2007123113632.jpg

    I checked the vtk code, and I found the vtkImageViewer2 class used the vtkImageActor class, that based on vtkProp2D, 
    and, the vtkImageViewer class used the vtkActor2D. But in our project, we must be used the vtkActor2D class:(

    I think that only remove something in the render result is ok, but how can I do? 

    Another question, I must use these code in above code:
     pViewer->GetImageMapper()->SetColorLevel(10);
     pViewer->GetImageMapper()->SetColorWindow(100);

    otherwise I can't get any result, why?


    Thanks for any advice!
    
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