[vtkusers] How To Change A 24 Bits BMP Picture To A 8 Bits ?

[JohnMark]

Hi , vtkusers ,     with the help of classes vtkStructuredPoints and vtkBMPWriter , I change the DICOM pictures to BMP pictures successfully . however , I found the BMP pictures' format was wrong when I decided to use them to reconsturct ( i.e. , volume rendering ) . it asked for 8 bits' BMP pictures , not 24 bits . So , I want to know whether there is a class changing 24 bits BMP picture to 8 bits ?      and I find there is not a function to do so in vtkStructuredPoints .      thanks a lot !      Mark
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