[vtkusers] how can i get grayscale scene?!

[xiong jun]

Dear friends, 
i want to display the grayscale images.But the following code is giving 
color image as output but i want grayscale image as output.And how to 
convert the color scene to grayscale?Please give me suggestion. 
For that output i wrote the folowing code: 
        vtkExtractVOI *extract = vtkExtractVOI::New(); 
                extract->SetInput(image); 
                extract->SetVOI(0,256,64,64,0,64); 

        vtkDataSetMapper *contMapper = vtkDataSetMapper::New(); 
                contMapper->SetInput(extract->GetOutput()); 
                contMapper->SetScalarRange(0,4095); 

        vtkActor *conactor = vtkActor::New(); 
                conactor->SetMapper(contMapper); 

                aRenderer->AddActor(conactor); 
                aRenderer->SetBackground(0.22656, 0.42969, 0.64453); 
                renWin->SetSize( 300, 300); 

        renWin->Render(); 
Thanking you, 
Regards, 
mickyxiong 











_________________________________________________________________
免费下载 MSN Explorer:  http://explorer.msn.com/lccn/