[vtkusers] displaying histogram using vtkImageAccumulate

[Prathamesh Kulkarni]

Hello all,

I want to be able to display histogram of a part of an image. Following is
what I did so far:

image_accumulate->SetInput(vtkImageData);
image_accumulate->SetStencil(vtkImageStencilData);
image_accumulate->Update();

histogram_image = image_accumulate->GetOutput();
histogram_image->Update();


When I cast the histogram image to unsigned char and render it using
vtkImageActor, I see a blank white image. Am I missing something here?


Thanks,
Prathamesh
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