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<DIV><FONT size=2>Hi to all,</FONT></DIV>
<DIV><FONT size=2>We know extracting a rectangular region is
simple(vtkExtractROI) ,but if we want to extact a irregular region ,how
to develop?</FONT></DIV>
<DIV><FONT size=2>Thanks</FONT></DIV></BODY></HTML>