[vtkusers] About sharing window/level values of vtkimageactor from 2D and 3D viewers

[Waldo Valenzuela]

Hi guys,

I am having a problem to shared the values of  window/level between a image actor of 2D viewer and 3D viewer, with the same values on both the colour image are different.

I create the vtkimageactor like this:

        // Create a greyscale lookup table
        vtkSmartPointer<vtkLookupTable> table =
        vtkSmartPointer<vtkLookupTable>::New();
        table->SetRange(0, 255); // image intensity range
        table->SetValueRange(0.0, 1.0); // from black to white
        table->SetSaturationRange(0.0, 0.0); // no color saturation
        table->SetRampToLinear();
        table->Build();
        
        m_imagemaper = VTKImageMapToWindowLevelColors::New();
        m_imagemaper->SetLookupTable(table);
        m_imagemaper->SetInputConnection(resliceimage->GetOutputPort());
        m_imagemaper->Update();

        VTKImageActor m_imageactor3D = VTKImageActor::New();
#if VTK_MAJOR_VERSION <= 5
        m_imageactor3D->SetInput(resliceimage->GetOutput());
#else
        m_imageactor3D->SetInputData(resliceimage->GetOutput());
#endif
        m_imageactor3D->GetMapper()->SetInputConnection(m_imagemaper->GetOutputPort());
        m_imageactor3D->Update();

        VTKImageActor m_imageactor2D = VTKImageActor::New();
#if VTK_MAJOR_VERSION <= 5
        m_imageactor2D->SetInput(resliceimage->GetOutput());
#else
        m_imageactor2D->SetInputData(resliceimage->GetOutput());
#endif
        m_imageactor2D->GetMapper()->SetInputConnection(m_imagemaper->GetOutputPort());
        m_imageactor2D->Update();

For 2D visualisation I set the interactor style to vtkInteractorStyleImage.
and 3D visualisation I set the interactor to vtkInteractorStyleTrackballCamera.

After, from the 2D viewer a get the window/level values like this:

            double window = this->CurrentImageProperty->GetColorWindow();
            double level = this->CurrentImageProperty->GetColorLevel();

and set this values to 3D visualisation:

        vtkImageMapToWindowLevelColors *mapper = vtkImageMapToWindowLevelColors::SafeDownCast(m_imageactor3D->GetMapper()->GetInputAlgorithm());
        if (mapper) {
            mapper->SetLevel(level);
            mapper->SetWindow(window);
            mapper->Update();
        }

But the problem is that colour (brightness and contrast) from 2D viewer is different from 3D viewer. I attached a screenshot of the problem.

I really appreciate any help on this problem.

Cheers,

Waldo.

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