[vtkusers] dimensions of image

[Renaud Isabelle]

Hi,
 
I'm reading a jpeg image with vtkJPEGReader and visualize it as usual with vtkActor, vtkRenderer, vtkRenderWindow.... 
 
To scale and position correctly my image, I need to set up camera parameters, as I forgot yesterday. 
 
My image is 640*470 pixels. However, as I'm trying to retrieve its dimensions , I got something wrong. 
 
//pipeline
void ExecutePipeline()
{
  shiftscale->SetInput( reader->GetOutput(); //vtkImageShiftScale
  actor->SetInput( shiftscale->GetOutput();  //vtkImageActor
  renderer->AddActor( actor );                     //vtkRenderer
  renderWindow->AddRenderer( renderer );   //vtkRenderWindow
 
  SetupCamera();
}
 
void SetupCamera()
{
 vtkImageData* image = reader->GetOutput();
 int dimension[2]; image->GetDimensions(dimension); --> 106200544, 0 ???????????????
 float spacing[2]; image->GetSpacing(spacing);          --> 1,1
 float origin[2];  image->GetOrigin(origin);                   --> 0,0

}
 
here is how I call my functions:
reader->SetFileName("image.jpg"); //vtkJPEGReader
ExecutePipeline();
 
What did I miss? Plese help me
 
Isabelle
 

		
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