<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2800.1479" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Hi there,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>I try to compute the initial translation of the two 3D data. However,
after<BR>I use vtkExtractVOI to extract a part (also a volume) from one of the
3D<BR>data. The origin stays the same! In my program, the
vtkImageData is used<BR>to be converted to itk::Image to compute the initial
translation, so if the<BR>origin information stay the same, the center of the
image is wrong. So, I<BR>wonder if the definition of the term "origin"
differs in vtk and itk?<BR></DIV>
<DIV><FONT face=Arial size=2>Thanx!</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Grace</FONT></DIV></BODY></HTML>