[vtkusers] Getting image data quickly into Java objects

[Jeff Lee]

mabey something like...

    vtkImageData imgData = ...

    vtkPNGWriter writer = new vtkPNGWriter();
    writer.SetInput(imgData);
    writer.WriteToMemoryOn();
    writer.Write();

    vtkUnsignedCharArray arr = writer.GetResult();

    byte[] bytes = new byte[arr.GetNumberOfTuples()];
    for (int i = 0; i < arr.GetNumberOfTuples(); ++i) {
      bytes[i] = (byte)arr.GetTuple1(i);
    }

...

Greg Scott wrote:

> I've seen in the past people have asked a similar question, yet I've 
> found no answers.
>  
> I would like to move the RGB data from a vtkImageData instance into 
> Java, i.e. into a byte[] array. As I understand it, the usual 
> GetScalarPointer methods are not available in the Java wrapping of VTK.
>  
> Can anyone suggest a fast way to do this, other than looping through 
> the entire image data doing GetPoint... on each one, which returns, 
> say a float.
>  
> Any suggestions would be much appreciated.
> Thanks
> Greg
>