[vtkusers] elp:How to get the gray value of a special point based on VTK

[杜 建军]

> friends:
>     I am developping a project based on VTK and VC6. Now,I want to get the grey value of some points on png/bmp/dicom/jepg images.
>     In VTK, defined vtkImageData *m_vtkImageData; ,when the valuable has the data of image. Now, how to get the gray value of a seed point.
>     give me some advices,please.
> 
> sincerely
>                                                    D.J.J